mechanical seamless tubings

Pipe Products
MECHANICAL
SEAMLESS TUBINGS
http://www.nssmc.com/
2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 Japan
Tel: +81-3-6867-4111
MECHANICAL SEAMLESS TUBINGS
P011en_01_201505f
© 2015 NIPPON STEEL & SUMITOMO METAL CORPORATION
Introduction
Nippon Steel & Sumitomo Metal Corporation, as a leading manufacturer
in the field of high-grade seamless steel pipes and tubes, provides seamless
steel pipes with the highest quality to various industries, including the
industrial machine market, such as energy, automobiles, and construction
machinery, etc.
At present, we are producing seamless pipes at Wakayama Works
(Wakayama City and Kainan City, Wakayama Prefecture), Amagasaki
Works (Amagasaki City, Hyogo Prefecture) and Kimitsu Works [Tokyo
Area] (Itabashi-ku, Tokyo), using the latest technology. In the seamless pipes
market for automobiles and construction machinery, functionality is becoming
higher year-by-year due to diversified requirements.
Our seamless steel pipes and tubes for machine structural use, produced
through consistent control regarding pig iron production and steelmaking
processes, are highly acclaimed by customers for having quality that is
unsurpassed by competitors, such as that regarding uniform composition,
smooth inner/outer surface characteristics, and highly accurate dimensions,
etc.
To meet the increasingly diversifying requirements of customers, we
continue to strive to become "No. 1 in customer evaluation."
Table of Contents
Introduction
Features ………………………………………………………………………………………………… 2
Major specifications and application examples ………………………………………… 2 ～ 5
Automobile parts …………………………………………………………………………………… 3
Construction machine parts ……………………………………………………………………… 4
Industrial machine parts and construction materials ……………………………………… 5
Production process drawings …………………………………………………………………6・7
Types and standard specifications ……………………………………………………………8・9
Range of production
Hot-finish seamless steel pipes (Mannesmann mandrel mill process) ………… 10・11
Hot-finish seamless steel pipes (Mannesmann plug mill process) ……………………… 12
Non-thermal, refined, highly weldable, high-tensile-strength steel pipes
(WEL-TEN ST series, Mannesmann plug mill process) ………………………………………… 13
Quenched and tempered steel pipes (Mannesmann mandrel mill process) … 14・15
Cold-finish seamless steel pipes (Mannesmann mandrel mill process) ………………… 16
Cold-finish seamless steel pipes (Mannesmann plug mill process) …………………… 17
Dimensional tolerance ………………………………………………………………………………18
References
Hardness conversion table ……………………………………………………………………… 19
Dimensions, mass, and cross-section performance ……………………………………… 20
Comparison table of carbon steel/alloy steel for machine structural use ……………… 21
Notice:
While every effort has been made to ensure the accuracy of the information contained within this publication, the use of the information is at the reader’s risk and no warranty is
implied or expressed by Nippon Steel & Sumitomo Metal Corporation with respect to the use of the information contained herein. The information in this publication is subject to
change or modification without notice. Please contact the Nippon Steel & Sumitomo Metal Corporation office for the latest information.
Please refrain from unauthorized reproduction or copying of the contents of this publication.
The names of our products and services shown in this publication are trademarks or registered trademarks of Nippon Steel & Sumitomo Metal Corporation, affiliated companies, or
third parties granting rights to Nippon Steel & Sumitomo Metal Corporation or affiliated companies. Other product or service names shown may be trademarks or registered trademarks of their respective owners.
1
Features
Steel pipes used for automobile parts (cold-finish)
1. Production of high-performance steel through consistent control, from the
material design stage onward
Airbag inflators
• To deliver materials that satisfy customer requirements, we consistently control our products from the material
design stage onward.
• We provide strict quality control, from the stages of material processing, pig iron production, and steelmaking
to the delivery of uniform products.
2. Production of seamless steel pipes with the latest tubemaking technology
For curtain airbags
For side airbags
• We have achieved excellent inner/outer surface characteristics and high dimensional accuracy with our unique
seamless tubemaking technology, including the high-cross-angle piercing method, which we developed owing
to years of experience and unceasing technical development.
3. Wide production range
• We utilize both hot-finish and cold-finish equipment. This allows us a wide range of production capabilities with
respect to product diameters from small to large.
• Using refining equipment such as sufficient numbers of heat treatment systems, we are able to produce
seamless steel pipes suitable for every specification and application.
4. Strict quality control
• Each process is computer controlled, and quality control is provided for each product.
• In addition, we provide strict quality control together with non-destructive inspections, thus we can stably
supply highly accurate products.
Constant velocity joint ball cages
Driveshafts
Thin section bearings
Airbag inflators (for passenger seats)
Constant velocity joint ball cages
Bearings
Major specifications and application examples
Driveshafts
Constant velocity ball cages
Stabilizers
Class
Major specifications
Major application examples
Processing examples
of products
Low carbon
STKM11A ～13A
S10C ～S25C
Cylinders, print rolls, dies, dolly parts, bushings,
joints, agriculture devices, forklift truck tires
Cutting, welding,
plastic forming
Medium carbon
STKM14A ～15A
S35C ～S38C
Driveshafts
Plastic forming,
heat treatment
High carbon
STKM16A、17A
S40 ～S55C
Print rolls, rack bars, input shafts, joints,
engine parts, transmission parts, cylinders,
bushings
Heat treatment (mainly
quenching
and tempering), cutting,
plastic forming
High-manganese steel
STKM18A ～20A
Cylinders, boring rods, airbags
Cutting, welding
(NSSMC material)
SUMISTRONGR55-H ～80-QC
WEL-TENR650H ～980ST
Cylinders, earth drills, crane booms
Cutting, welding
Alloy steel
SCr415, 420
SCM415 ～440
SNCM439
Gears, cylinders, bushings, airbags,
accumulators, bit materials, drive parts
(driveshafts, ball cages)
Heat treatment, cutting,
plastic forming
SUJ2
Bearings, inner races, slide shafts
Cutting, heat treatment
Carbon steel
Bearing steel
Steering rack bars
Bearings for valve rockers
Stabilizers
2
Driveshafts
Bearings for water pumps
Input shafts
Steering rack bars
3
Steel pipes used for construction machine parts (hot-finish)
Steel pipes used for industrial machine parts and construction materials (hot-finish)
Boom materials
Print rolls
Print rolls
Flanges for power shovels
Rolls for cardboard processing
Crawler cranes
Earth drills
Gear materials
Bushings for crawler tracks
Shovels
Pins for crawler tracks
Seismic-control oil dampers
Truck cranes
Cylinders
4
Accumulators
5
Production process drawings Seamless steel pipes (Mannesmann process)
■ Hot-finish process
◎ Mandrel mill process
After heating the round steel billet, hollow pipes are developed using a cross-angle piercer. Then, they are
elongated and rolled to develop the base pipe using a mandrel mill, which is a multi-stage continuous roll. This
base pipe is reheated and finished to control the specified outside diameter and thickness, by reduction mill, and
then the products are considered completed.
◎ Plug mill process
After heating a round steel billet, hollow pipes are developed using a piercer. Then, they are elongated and
rolled using a plug mill. Subsequently, they are reeled and sized to specified diameters, and are then considered
completed. Smaller steel pipes are finished to control the specified outside diameter and thickness, by reduction
mill, after reheating the original pipe formed to the specified diameter.
Piercer
Cross-angle piercer
◎ Cold process
Products that require higher dimensional accuracy and furthered mechanical properties compared to products
manufactured by the hot process are cold-drawn after the hot process, and are then considered complete.
Mannesmann process
Rolling
(mandrel mill)
Cross-angle piercing
Hot process
Pipe materials
Heating
Cooling
Piercing
Straightening
Rolling
(plug mill)
Reeling
pipes
Specifying the diameter
Specifying the diameter
Non-destructive inspection
Reheating
Identification/painting
Reduction mill
Hot-roll products
Cold process
Heat treatment
Lubrication
Cold drawing
Cutting
6
Heat treatment
Non-destructive inspection
Identification/painting
Straightening
Cold-roll products
7
Types and standard specifications
Table 1: Chemical composition and mechanical properties
Type code
Production
method
Chemical composition (%)
C
Si
Mn
P
Cu
Ni
Cr
Ni+Cr
Mo
Nb
V
Nb+V
B
≦ 0.60
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 290
－
≦ 0.35
0.30 ～ 0.90
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 370
≧ 215
≧ 30
0.35 ～ 0.45
≦ 0.40
0.40 ～ 1.00
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 510
≧ 325
≧ 20
0.45 ～ 0.55
≦ 0.40
0.40 ～ 1.00
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 550
≧ 345
≧ 20
≦ 0.18
≦ 0.55
≦ 1.50
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 440
≧ 275
≧ 25
≦ 0.18
≦ 0.55
≦ 1.50
≦ 0.040
≦ 0.040
－
－
－
－
－
－
－
－
－
≧ 490
≧ 315
≧ 23
≦ 0.25
≦ 0.55
≦ 1.60
≦ 0.040
≦ 0.040
－
－
－
－
－
≦ 0.15
≦ 0.15
≦ 0.15
－
≧ 540
≧ 390
≧ 23
0.32 ～ 0.38
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.035
≦ 0.30
≦ 0.20
≦ 0.20
≦ 0.35
－
－
－
－
－
＊2
＊2
＊2
0.37 ～ 0.43
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.035
≦ 0.30
≦ 0.20
≦ 0.20
≦ 0.35
－
－
－
－
－
＊2
＊2
＊2
0.42 ～ 0.48
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.035
≦ 0.30
≦ 0.20
≦ 0.20
≦ 0.35
－
－
－
－
－
＊2
＊2
＊2
0.52 ～ 0.58
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.035
≦ 0.30
≦ 0.20
≦ 0.20
≦ 0.35
－
－
－
－
－
＊2
＊2
＊2
≦ 0.30
≧ 0.10
0.29 ～ 1.06
≦ 0.035
≦ 0.035
≦ 0.40
≦ 0.40
≦ 0.40
―
≦ 0.15
―
≦ 0.08
―
―
≧ 415
≧ 240
AS PER ASTM
≦ 0.35
≧ 0.10
0.29 ～ 1.06
≦ 0.035
≦ 0.035
≦ 0.40
≦ 0.40
≦ 0.40
―
≦ 0.15
―
≦ 0.08
―
―
≧ 485
≧ 275
AS PER ASTM
0.22 ～ 0.28
―
0.60 ～ 0.90
≦ 0.040
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.19 ～ 0.25
―
1.35 ～ 1.65
≦ 0.040
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.36 ～ 0.44
―
1.35 ～ 1.65
≦ 0.040
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.22 ～ 0.28
―
0.60 ～ 0.90
≦ 0.030
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.19 ～ 0.25
―
1.35 ～ 1.65
≦ 0.030
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.36 ～ 0.44
―
1.35 ～ 1.65
≦ 0.030
≦ 0.050
―
―
―
―
―
―
―
―
―
―
―
―
0.38 ～ 0.43
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
0.36 ～ 0.43
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
SCr420TK
SAE 4130
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
SUJ2
STKM17A
STKM18A
STKM18B
STKM20A
S35C
Carbon steel
≦ 0.35
≦ 0.25
Annealing
STKM16A
S40C
S45C
S55C
A106 GR.B
A106 GR.C
A519 GR.1026
A519 GR.1524
A519 GR.1541
SAE 1026
SAE 1524
SAE 1541
DIN1629 ST52.0-1984
SCr415
SCr420
SCM415
SCM420
SCM430
SCM435
SCM440
Alloy steel
SCM415TK
SCM420TK
SCM430TK
SCM435TK
SCM440TK
A519 GR.4130
A295 GR.52100
≦ 0.22
≦ 0.55
≦ 1.60
≦ 0.040
≦ 0.035
―
―
―
―
―
―
―
―
―
500 ～ 650
≧ 355
AS PER DIN
0.13 ～ 0.18
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
－
－
－
－
－
＊2
＊2
＊2
0.18 ～ 0.23
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
－
－
－
－
－
＊2
＊2
＊2
0.13 ～ 0.18
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.25
－
－
－
－
＊2
＊2
＊2
0.18 ～ 0.23
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.25
－
－
－
－
＊2
＊2
＊2
0.28 ～ 0.33
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.33 ～ 0.38
0.15 ～ 0.35
0.60 ～ 0.90
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
≦ 0.30
1.60 ～ 2.00
0.60 ～ 1.00
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.18 ～ 0.23
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
－
－
－
－
－
＊2
＊2
＊2
0.13 ～ 0.18
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.18 ～ 0.23
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.28 ～ 0.33
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.33 ～ 0.38
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.38 ～ 0.43
0.15 ～ 0.35
0.60 ～ 0.85
≦ 0.030
≦ 0.030
≦ 0.30
≦ 0.25
0.90 ～ 1.20
－
0.15 ～ 0.30
－
－
－
－
＊2
＊2
＊2
0.28 ～ 0.33
0.15 ～ 0.35
0.40 ～ 0.60
≦ 0.040
≦ 0.040
―
―
0.80 ～ 1.10
―
0.15 ～ 0.25
―
―
―
―
≧ 621
≧ 483
AS PER ASTM
0.28 ～ 0.33
0.15 ～ 0.35
0.40 ～ 0.60
≦ 0.030
≦ 0.040
―
―
0.80 ～ 1.10
―
0.15/0.25
―
―
―
―
―
―
―
Stress relieving
0.95 ～ 1.10
0.15 ～ 0.35
≦ 0.50
≦ 0.025
≦ 0.025
≦ 0.25
≦ 0.25
1.30 ～ 1.60
－
≦ 0.08
－
－
－
－
Annealing
0.93 ～ 1.05
0.15 ～ 0.35
0.25 ～ 0.45
≦ 0.025
≦ 0.015
≦ 0.30
≦ 0.25
1.35 ～ 1.60
－
≦ 0.10
－
－
－
－
Hardness HRBS ≦ 100
Annealing
0.98 ～ 1.10
0.15 ～ 0.35
0.25 ～ 0.45
≦ 0.025
≦ 0.025
≦ 0.35
≦ 0.25
1.30 ～ 1.60
－
≦ 0.06
SUMISTRONG 55-H
No heat treatment
(As rolled)
≦ 0.22
≦ 0.50
≦ 1.50
≦ 0.035
≦ 0.035
－
－
－
－
－
≦ 0.08
≦ 0.12
－
－
≧ 540
≧ 390
≧ 23
SUMISTRONG® 60-Q
Quenching, tempering
≦ 0.22
≦ 0.50
≦ 1.50
≦ 0.035
≦ 0.035
≦ 0.50
≦ 0.50
≦ 0.60
－
≦ 0.30
－
≦ 0.12
－
－
≧ 590
≧ 490
≧ 20
SUMISTRONG® 65-H
No heat treatment
(As rolled)
≦ 0.22
≦ 0.50
≦ 1.20
≦ 0.035
≦ 0.035
－
－
0.30 ～ 1.10
－
0.10 ～ 0.30
－
≦ 0.12
－
－
≧ 640
≧ 440
≧ 20
SUMISTRONG® 80-QA
Quenching, tempering
≦ 0.22
≦ 0.50
≦ 1.20
≦ 0.035
≦ 0.035
≦ 0.50
－
0.30 ～ 1.10
－
0.10 ～ 0.30
－
≦ 0.12
－
≦ 0.006
≧ 785
≧ 685
≧ 15
SUMISTRONG® 80-QC
Quenching, tempering
≦ 0.16
≦ 0.35
≦ 1.20
≦ 0.030
≦ 0.010
≦ 0.50
≦ 1.00
≦ 0.80
－
≦ 0.60
－
≦ 0.10
－
≦ 0.006
≧ 785
≧ 685
≧ 15
SUMISTRONG® 100-QC Quenching, tempering
≦ 0.20
≦ 0.50
≦ 1.20
≦ 0.025
≦ 0.010
≦ 0.20
≦ 0.20
≦ 1.20
≦ 1.20
≦ 0.90
≦ 0.06
≦ 0.10
≦ 0.10
―
≧ 960
≧ 890
14
WEL-TENR 650H
Normalizing
≦ 0.18
0.15 ～ 0.35
0.60 ～ 1.20
≦ 0.030
≦ 0.030
0.15 ～ 0.50
－
0.70 ～ 1.30
－
≦ 0.60
－
－
－
≦ 0.006
≧ 650
≧ 460
≧ 20
WEL-TENR 780ST
Thermo-mechanical
control process
Thermo-mechanical
control process
Thermo-mechanical
control process
≦ 0.10
≦ 0.20
≦ 2.20
≦ 0.020
≦ 0.010
－
≦ 0.55
－
－
≦ 0.35
≦ 0.08
－
－
≦ 0.002
≧ 785
≧ 685
≧ 15
≦ 0.10
≦ 0.20
≦ 2.20
≦ 0.020
≦ 0.010
－
≦ 0.55
－
－
≦ 0.40
≦ 0.08
－
－
≦ 0.002
≧ 880
≧ 800
≧ 15
≦ 0.12
≦ 0.20
≦ 2.30
≦ 0.020
≦ 0.010
－
≦ 0.55
－
－
≦ 0.60
≦ 0.08
－
－
≦ 0.003
≧ 980
≧ 890
≧ 14
SAE 52100
®
High-tensile-strength steel
WEL-TENR 880ST
WEL-TENR 980ST
Remarks
Elongation
≦ 0.12
SNCM439
STKM13A
Tensile strength
Yield Stress
N/mm2
N/mm2
％
≧ 35
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
No heat treatment
(As rolled)
STKM11A
Mechanical properties
S
JIS G3445
Carbon steel tubes
for machine structural
purposes
JIS G4051
ASTM A106
Cr+Cu+Mo+Ni+V ≦ 1%
ASTM A519
SAE
DIN1629
JIS G4053
Low-alloyed steels for
machine structural use
JISG3441
Alloy steel tubes for
machine purposes
ASTM A519
SAE
JIS G4805
High carbon chromium
bearing steels
ASTM A295
SAE
NSSMC standard
Note: The list above shows typical steel types. We can produce steel types other than the above. Please contact us for details.
*1. The elongation is the pipe axis direction of JIS N. 11 or a No. 12 test piece.
*2. If records of proof are required, we are prepared to discuss the details with you.
8
9
Range of production
Table 2: Production range of hot-finish seamless steel pipes (Mannesmann mandrel mill process)
Thickness（mm）
Outside diameter
（mm）
2
4
5
10
15
20
Outside diameter
25
30
35
40
45
（mm）
50
12.0
31.8
34.0
38.1
40.0
42.7
45.0
48.6
50.8
54.0 55.0
57.0
60.5
63.5 65.0
70.0
73.0
76.3
80.0
82.6 85.0
89.1
95.0 96.0
101.6
105.0
110.0 114.3
120.0
124.0
127.0
130.0
135.0
139.8
146.0
150.0
152.4
154.0
156.0
159.0
165.2
168.3
177.8
180.0
185.0
190.7
193.7
200.0
203.0
205.0
210.0
216.3
219.1
225.0
232.0
241.8
244.5
250.0
254.0
267.4
273.1
280.0
285.0
298.5
300.0
305.0
318.5
323.9
339.7
350.0
355.6
365.1
381.0
400.0
406.4
426.0
（mm）
3
13.0
: Range to be discussed
14.5
16.0
17.0
18.0
3.0
2.8
19.0
20.0
21.0
3.0
22.0
24.5
25.5
26.5
3.2
28.0
29.0
3.5
3.7
35.0
4.0
40.0
36.0
30.9
5.0
46.5
41.2
48.0
43.0
46.5
50.0
40.0
6.5
7.0
40.0
45.0
8.0
51.0
9.0
7.5
8.5
2
3
4
5
Outside diameter
10.5
10
15
20
25
Thickness（mm）
30
35
40
45
50
51.5
31.8
34.0
38.1
40.0
42.7
45.0
48.6
50.8
54.0 55.0
57.0
60.5
63.5 65.0
70.0
73.0
76.3
80.0
82.6 85.0
89.1
95.0 96.0
101.6
105.0
110.0 114.3
120.0
124.0
127.0
130.0
135.0
139.8
146.0
150.0
152.4
154.0
156.0
159.0
165.2
168.3
177.8
180.0
185.0
190.7
193.7
200.0
203.0
205.0
210.0
216.3
219.1
225.0
232.0
241.8
244.5
250.0
254.0
267.4
273.1
280.0
285.0
298.5
300.0
305.0
318.5
323.9
339.7
350.0
355.6
365.1
381.0
400.0
406.4
426.0
（mm）
Outside diameter
Note 1: We can discuss sizes not shown in the table above.
2: For the production range of STKM13B, please contact us.
10
11
Range of production
Table 4: Production range of non-thermal, refined, highly weldable, high-tensile-strength steel pipes
(WEL-TEN ST series, Mannesmann plug mill process)
Table 3: Production range of hot-finish seamless steel pipes (Mannesmann plug mill process)
Outside
diameter
（mm）
25.4 ＊
27.2
27.35
30.0 ＊
31.8
33.4
34.0
38.1
40.0
42.2 ＊
42.7
45.0
48.3
48.6
50.8
54.0
55.0 ＊
57.0 ＊
59.8 ＊
60.3
60.5
63.5
65.0
70.0
73.0
76.0 ＊
76.3
80.0
82.6
85.0
88.9
89.1
90.7 ＊
95.0 ＊
96.0 ＊
101.6
105.0
107.0
110.0
114.3
120.0
124.0 ＊
125.0 ＊
127.0
130.0 ＊
135.0 ＊
139.8
141.3 ＊
146.0 ＊
152.4 ＊
159.0 ＊
165.2
168.3
Thickness（mm）
3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
3.1
7.0
2.9
Outside
diameter
（mm）
Thickness（mm）
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
60.3
8.0
63.5
（ WEL-TEN®780C ）
: Range to be discussed
73.0
10.0
: Range to be discussed
3.2
12.0
76.3
82.6
13.0
88.9
3.5
15.0
101.6
4.0
114.3
3.5
WEL-TEN®780ST
WEL-TEN®880ST
120.6
15.5
127.0
16.0
139.8
20.0
3.8
21.0
5.0
152.4
（ WEL-TEN®780C ）
22.0
168.3
25.0
4.0
5.0
Note: We can discuss sizes of an outside diameter at less than 60.3Φ. Please contact us for details.
7.1
5.0
25.5
30.0
4.0
17.9
31.0
31.5
5.2
18.0
31.5
4.5
35.0
6.0
40.0
5.6
45.0
5.5
5.4
40.0
Note 1: We can produce the items marked with an asterisk (*) for large orders or depending on the roll period. Please contact us for details.
2: We can discuss sizes not shown in the table above.
12
13
Range of production
Table 5: Production range of quenched and tempered steel pipes (Mannesmann mandrel mill process)
Thickness（mm）
Outside diameter
（mm）
42.7
45.0
48.6
50.8
54.0 55.0
57.0
60.5
63.5 65.0
70.0
73.0
76.3
80.0
82.6 85.0
89.1
95.0 96.0
101.6
105.0
110.0 114.3
120.0
124.0
127.0
130.0
135.0
139.8
146.0
150.0
152.4
154.0
156.0
159.0
165.2
168.3
177.8
180.0
185.0
190.7
193.7
200.0
203.0
205.0
210.0
216.3
219.1
225.0
232.0
241.8
244.5
250.0
254.0
267.4
273.1
280.0
285.0
298.5
300.0
305.0
318.5
323.9
339.7
350.0
355.6
365.1
381.0
400.0
406.4
426.0
（mm）
Outside diameter
5
10
15
20
25
Outside diameter
30
35
40
45
50
16.0
42.7
45.0
48.6
50.8
54.0 55.0
57.0
60.5
63.5 65.0
70.0
73.0
76.3
80.0
82.6 85.0
89.1
95.0 96.0
101.6
105.0
110.0 114.3
120.0
124.0
127.0
130.0
135.0
139.8
146.0
150.0
152.4
154.0
156.0
159.0
165.2
168.3
177.8
180.0
185.0
190.7
193.7
200.0
203.0
205.0
210.0
216.3
219.1
225.0
232.0
241.8
244.5
250.0
254.0
267.4
273.1
280.0
285.0
298.5
300.0
305.0
318.5
323.9
339.7
350.0
355.6
365.1
381.0
400.0
406.4
426.0
17.0
18.0
19.0
20.0
21.0
22.0
24.5
25.5
26.5
28.0
29.0
5.0
30.0
5.5
7.0
7.5
40.0
8.0
9.0
10.5
39.5
5
10
15
20
25
Thickness（mm）
30
35
40
（mm）
45
50
（mm）
Outside diameter
Note: We can discuss sizes not shown in the table above.
14
15
Range of production
Table 7: Production range of cold-finish seamless steel pipes (Mannesmann plug mill process)
Bearings
Outside
diameter
(mm)
Thickness (mm)
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0
15.9
19.0
21.7
25.4
27.2
31.8
34.0
38.1
42.7
45.0
48.6
50.8
54.0
57.0
60.3
63.5
70.0
76.2
82.6
88.9
101.6
114.3
127.0
Outside
diameter
(mm)
5.4
6.3
: Range to be
discussed
8.1
8.1
9.4
10.5
10.5
11.7
12.3
13.5
13.5
15.0
15.0
16.0
16.2
16.2
16.9
15.9
15.9
15.9
15.9
15.9
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0
Thickness (mm)
Outside
diameter
(mm)
15.9
19.0
21.7
25.4
27.2
31.8
34.0
38.1
42.7
45.0
48.6
50.8
54.0
57.0
60.3
63.5
70.0
76.2
82.6
88.9
101.6
114.3
127.0
Outside
diameter
(mm)
Carbon steel, alloy steel
Outside
diameter
(mm)
15.9
19.0
21.7
25.4
27.2
31.8
34.0
38.1
42.7
45.0
48.6
50.8
54.0
57.0
60.3
63.5
70.0
76.2
82.6
88.9
101.6
114.3
127.0
Outside
diameter
(mm)
16
Thickness (mm)
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0
5.4
6.3
6.3
6.7
8.1
8.1
9.4
7.4
7.4
10.5
10.5
8.3
9.3
9.8
11.7
12.3
10.6
14
15.5
15.5
11.1
11.8
17
12.5
18.5
18.5
18.5
18.8
13.2
13.9
3.2
15.3
15.9
15.9
15.9
15.9
15.9
15.9
18.1
17.0
15.9
19.0
21.7
: Range to be
25.4
discussed
27.2
31.8
34.0
38.1
42.7
45.0
48.6
50.8
54.0
57.0
60.3
63.5
70.0
76.2
20.0
82.6
20.0
88.9
19.4
101.6
114.3
127.0
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0
Thickness (mm)
Outside
diameter
(mm)
Outside
diameter
(mm)
Outside
diameter
(mm)
Thickness (mm)
0.8
0.9
1.0
1.2
1.6
1.8
2.0
2.3
2.6
2.9
3.0
3.2
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
17.0
Table 6: Production range of cold-finish seamless steel pipes (Mannesmann mandrel mill process)
15.0
17.2
17.5
18.0
19.0
20.0
21.7
22.2
25.0
25.4
27.2
28.6
30.0
31.8
34.0
35.0
38.1
40.0
41.0
42.7
45.0
48.0
50.8
54.0
60.3
60.5
63.5
64.0
65.0
68.0
70.0
76.0
76.2
76.3
80.0
82.6
88.9
89.1
101.6
110.0
114.3
120.0
125.0
130.0
136.0
139.8
140.0
145.0
150.0
152.4
: Range to be discussed
Note: We can discuss sizes not shown in the table above.
17
Dimensional tolerance
Reference data: Hardness
Table 8: Dimensional tolerance
Table 9: Hardness conversion table
Tolerance
("D" for outside diameter)
D ＜ 50mm
D ≧ 50mm
± 0.5mm
No.2
D ＜ 50mm
D ≧ 50mm
± 0.25mm
± 0.12mm
No.3
D ＜ 25mm
25mm ≦ D ＜ 40mm
40mm ≦ D ＜ 50mm
50mm ≦ D ＜ 60mm
60mm ≦ D ＜ 70mm
70mm ≦ D ＜ 80mm
80mm ≦ D ＜ 90mm
90mm ≦ D ＜ 100mm
D ≧ 100mm
D ＜ 13mm
13mm ≦ D ＜ 25mm
25mm ≦ D ＜ 40mm
40mm ≦ D ＜ 65mm
65mm ≦ D ＜ 90mm
90mm ≦ D ＜ 140mm
D ≧ 140mm
± 0.25mm
No.1
No.4
WEL-TEN®
series
76.3mm ≦ D ＜ 90mm
90mm ≦ D ＜ 140mm
D ≧ 140mm
Class
Tolerance
("t" for outside diameter)
± 1 %
t ＜ 4mm
± 0.5 %
± 0.15mm
+ 0.6mm
－ 0.5mm
No.1
t ≧ 4mm
± 0.20mm
± 0.23mm
+ 15 %
－ 12.5%
± 0.25mm
± 0.30mm
No.2
t ＜ 3mm
t ≧ 3mm
± 0.3mm
No.3
t ＜ 2mm
t ≧ 2mm
± 0.15mm
± 10 ％
± 0.40mm
± 0.60mm
± 0.80mm
± 1.20mm
± 8 ％
(Upon agreement between
the parties involved)
± 1.00mm
± 1.20mm
± 1.0 ％
｛
2.75
｛
｛
2.85
｛
2.90
± 0.40mm
± 1.00mm
｛
2.70
2.80
± 0.18mm
± 0.5 %
Brinell
indent
diameter
mm
WEL-TEN®
series
Notes:
⑴ No. 1 shall apply to the outside tolerance of hot-finish seamless steel pipes.
⑵ In principle, No. 4 shall apply to the outside tolerance of pipes involving quenching and tempering.
⑶ No. 1 shall apply to the thickness tolerance of hot-finish seamless steel pipes.
⑷ The length tolerance shall be +50 mm and –0.
⑸ We can discuss dimensional tolerances not shown above.
─
± 12.5％
2.95
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
3.70
3.75
3.80
3.85
3.90
3.95
4.00
4.05
4.10
4.15
4.20
4.25
4.30
4.35
4.40
4.45
4.50
4.55
4.60
4.65
4.70
4.80
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
Brinell hardness 10-mm
ball/load 3,000 kgf
Standard
balls
─
─
（495）
─
─
（477）
─
─
（461）
─
─
444
─
─
429
415
401
388
375
363
352
341
331
321
311
302
293
285
277
269
262
255
248
241
235
229
223
217
212
207
201
197
192
187
183
179
174
170
167
163
156
149
143
137
131
126
121
116
111
Tungsten
carbide
balls
─
514
─
─
495
─
─
477
─
─
461
─
─
444
429
415
401
388
375
363
352
341
331
321
311
302
293
285
277
269
262
255
248
241
235
229
223
217
212
207
201
197
192
187
183
179
174
170
167
163
156
149
143
137
131
126
121
116
111
553
547
539
530
528
516
508
508
495
491
491
474
472
472
455
440
425
410
396
383
372
360
350
339
328
319
309
301
292
284
276
269
261
253
247
241
234
228
222
218
212
207
202
196
192
188
182
178
175
171
163
156
150
143
137
132
127
122
117
Rockwell superficial hardness diamond conical
indenter
Rockwell hardness*2
C scaleD scaleA scale-load 60- B scale-load
load 150-kgf
load 100-kgf
kgf diamond 100-kgf dia. 1.6diamond conical diamond conical
conical indenter mm (1/16 in) ball
indenter
indenter
77.1
76.9
76.7
76.4
76.3
75.9
75.6
75.6
75.1
74.9
74.9
74.3
74.2
74.2
73.4
72.8
72.0
71.4
70.6
70.0
69.3
68.7
68.1
67.5
66.9
66.3
65.7
65.3
64.6
64.1
63.6
63.0
62.5
61.8
61.4
60.8
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
（110.0）
（109.0）
（108.5）
（108.0）
（107.5）
（107.0）
（106.0）
（105.5）
（104.5）
（104.0）
（103.0）
（102.0）
（101.0）
100.0
99.0
98.2
97.3
96.4
95.5
94.6
93.8
92.8
91.9
90.7
90.0
89.0
87.8
86.8
86.0
85.0
82.9
80.8
78.7
76.4
74.0
72.0
69.8
67.6
65.7
52.5
52.1
51.6
51.1
51.0
50.3
49.6
49.6
48.8
48.5
48.5
47.2
47.1
47.1
45.7
44.5
43.1
41.8
40.4
39.1
37.9
36.6
35.5
34.3
33.1
32.1
30.9
29.9
28.8
27.6
26.6
25.4
24.2
22.8
21.7
20.5
（18.8）
（17.5）
（16.0）
（15.2）
（13.8）
（12.7）
（11.5）
（10.0）
（　9.0）
（　8.0）
（　6.4）
（　5.4）
（　4.4）
（　3.3）
（　0.9）
─
─
─
─
─
─
─
─
65.0
64.7
64.3
63.9
63.8
63.2
62.7
62.7
61.9
61.7
61.7
61.0
60.8
60.8
59.7
58.8
57.8
56.8
55.7
54.6
53.8
52.8
51.9
51.0
50.0
49.3
48.3
47.6
46.7
45.9
45.0
44.2
43.2
42.0
41.4
40.5
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
15-N
scale load
15 kgf
30-N
scale load
30 kgf
45-N
scale load
45 kgf
86.7
86.5
86.3
86.0
85.9
85.6
85.3
85.3
84.9
84.7
84.7
84.1
84.0
84.0
83.4
82.8
82.0
81.4
80.6
80.0
79.3
78.6
78.0
77.3
76.7
76.1
75.5
75.0
74.4
73.7
73.1
72.5
71.7
70.9
70.3
69.7
70.7
70.3
69.9
69.5
69.4
68.7
68.2
68.2
67.4
67.2
67.2
66.0
66.8
65.8
64.6
63.5
62.3
61.1
59.9
58.7
57.6
56.4
55.4
54.3
53.3
52.2
51.2
50.3
49.3
48.3
47.3
46.2
45.1
43.9
42.9
41.9
58.0
57.6
56.9
56.2
56.1
55.2
54.5
54.5
53.5
53.2
53.2
51.7
51.5
51.5
49.9
48.4
46.9
45.3
43.6
42.0
40.5
39.1
37.8
36.4
34.4
33.8
32.4
31.2
29.9
28.5
27.3
26.0
24.5
22.8
21.5
20.1
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
─
Shore hardness
Thickness
Vickers
hardness
Outside diameter
Class
conversion table
─
70
─
─
68
─
─
66
─
─
65
─
─
63
61
59
58
56
54
52
51
50
48
47
46
45
43
─
41
40
39
38
37
36
35
34
─
33
─
32
31
30
29
─
28
27
─
26
─
25
─
23
22
21
─
20
19
18
15
Tensile
strength
(approximate
value) MPa ＊1
1915
1890
1855
1825
1820
1780
1740
1740
1680
1670
1670
1595
1585
1585
1510
1460
1390
1330
1270
1220
1180
1130
1095
1060
1025
1005
970
950
925
895
875
850
825
800
785
765
─
725
705
690
675
655
640
620
615
600
585
570
560
545
525
505
490
460
450
435
415
400
385
Note 1: 1 MPa = 1 N/mm2
2: The values shown in parentheses in the table are not often used. They are shown for reference only.
18
19
Dimensions, mass, and cross-section performance
Table 10: Dimensions, mass, and cross-section performance
Outside
diameter
Thickness
Mass
Crosssection
area
（mm）（mm）（kg/m） （cm ）
2
D
27.2
34.0
42.7
48.6
60.5
76.3
89.1
101.6
4
（cm ）
I
1.22
1.41
2.89
5.97
7.77
8.99
9.32
11.8
17.8
21.2
23.7
43.7
49.2
59.1
70.7
79.8
86.4
（cm ）
3
Z
0.893
1.03
1.70
2.80
3.64
3.70
3.83
4.86
5.90
7.00
7.84
11.5
12.9
13.2
15.9
17.9
19.4
Radius of
gyration of
area
（cm）
t
1.9
2.3
2.3
2.3
3.2
2.3
2.4
3.2
2.3
2.8
3.2
2.8
3.2
2.3
2.8
3.2
3.5
W
1.19
1.41
1.80
2.29
3.12
2.63
2.73
3.58
3.30
3.98
4.52
5.08
5.77
4.92
5.96
6.78
7.39
i
0.897
0.880
1.12
1.43
1.40
1.64
1.64
1.61
2.06
2.04
2.03
2.60
2.59
3.07
3.05
3.04
3.03
4.2
8.79
11.20
101
22.7
3.01
3.2
3.5
7.76
8.47
9.892
10.79
120
130
23.6
25.6
3.48
3.47
4.2
10.1
12.85
153
30.1
3.45
2.8
3.5
4.5
7.70
9.56
12.2
9.808
12.18
15.52
153
187
234
26.7
32.7
41.0
3.94
3.92
3.89
6.0
16.0
20.41
300
52.5
3.83
3.5
4.0
4.5
11.8
13.4
15.0
14.99
17.07
19.13
348
394
438
49.8
56.3
62.7
4.82
4.80
4.79
5.0
16.6
21.17
482
68.9
4.77
3.8
4.0
4.5
15.1
15.9
17.8
19.27
20.26
22.72
628
658
734
76.0
79.7
88.9
5.71
5.70
5.68
5.0
19.8
25.16
808
97.8
5.67
4.5
20.7
26.32
114×10
120
6.59
5.3
24.2
30.87
133×10
139
6.56
4.5
5.8
23.5
30.1
29.94
38.36
168×10
213×10
155
197
7.49
7.45
8.2
42.1
53.61
291×10
269
7.36
267.4
6.0
6.6
38.7
42.4
49.27
54.08
421×10
460×10
315
344
9.24
9.22
9.3
59.2
75.41
629×10
470
318.5
6.0
6.9
7.9
46.2
53.0
60.5
58.91
67.55
77.09
719×10
820×10
930×10
452
515
584
11.1
11.0
11.0
10.3
78.3
99.73
119×102 744
10.9
6.4
7.9
9.5
11.1
55.1
67.7
81.1
94.3
70.21
86.29
103.3
120.1
107×102
130×102
155×102
178×102
602
734
871
100×10
12.3
12.3
12.2
12.2
12.7 107.0
136.8
201×102 113×10
11.7
6.4
63.1
7.9
77.6
9.5
93.0
12.7 123.0
80.42
98.90
118.5
157.1
161×102
196×102
233×102
305×102
14.1
14.1
14.0
13.9
114.3
139.8
165.2
190.7
216.3
355.6
406.4
20
A
1.510
1.799
2.291
2.919
3.971
3.345
3.483
4.564
4.205
5.073
5.760
6.465
7.349
6.272
7.591
8.636
9.412
Moment of Modulus of
inertia of area section
792
967
115×10
150×10
9.13
Outside
diameter
Table 11: Comparison table of carbon steel/alloy steel for machine structural use
Thickness
Mass
Crosssection
area
（mm）（mm）（kg/m） （cm ）
2
D
457.2
508.0
558.8
609.6
711.2
812.8
914.4
1016.0
Comparison table of carbon steel/alloy steel for machine structural use
t
6.4
7.9
9.5
12.7
6.4
7.9
9.5
12.7
6.4
7.9
9.5
12.7
6.4
7.9
9.5
12.7
6.4
7.9
9.5
12.7
6.4
7.9
9.5
12.7
16.0
7.9
9.5
12.7
16.0
9.5
12.7
16.0
W
71.1
87.5
105
139
79.2
97.4
117
155
87.2
107
129
171
95.2
117.2
141
187
111.2
137.0
165.0
219
127.3
156.8
188
251
314
176.6
212
282
354
236
314
395
A
90.64
111.5
133.6
177.3
100.9
124.1
148.8
197.6
111.1
136.7
163.9
217.9
121.3
149.3
179.1
238.2
141.7
174.6
198.5
278.7
162.1
199.8
239.7
319.2
400.5
225
270.1
359.8
451.6
300.4
400.3
502.7
Moment of
inertia of area
4
（cm ）
I
230×102
281×102
335×102
438×102
317×102
388×102
462×102
606×102
424×102
519×102
619×102
813×102
552×102
676×102
806×102
106×103
880×102
108×103
129×103
170×103
132×103
162×103
193×103
256×103
318×103
231×103
276×103
366×103
456×103
380×103
504×103
628×103
Modulus of
section
（cm ）
3
Z
1010
1230
1470
1920
1250
1530
1820
2390
151×10
186×10
221×10
291×10
181×10
222×10
265×10
348×10
247×10
304×10
363×10
478×10
324×10
398×10
476×10
629×10
782×10
506×10
605×10
800×10
997×10
749×10
992×10
124×10
Radius of
gyration
of area
（cm）
i
15.9
15.9
15.8
15.7
17.7
17.7
17.6
17.5
19.5
19.5
19.4
19.3
21.3
21.3
21.2
21.1
24.9
24.9
24.8
24.7
28.5
28.5
28.4
28.3
28.2
32.1
32.0
31.9
31.8
35.6
35.5
35.4
C (%)
0.05
Standard
0.10
0.15
0.20
0.25
S10C
S15C
S20C
JIS G4051
(carbon steel)
0.35
S12C
S17C
0.40
S30C
S22C
0.50
0.55
S45C
S38C
S33C
STKM15A
0.60
S50C
S35C
S28C
STKM11A
0.45
S40C
S25C
S55C
S48C
S58C
S43C
STKM16A
S53C
STKM17A
STKM12A
JIS G3445
(carbon steel)
STKM13A
STKM18A
STKM14A
STKM19A,20A
1010
1015
1020
1012
⑴ Pipe mass（kg/m）　W = 0.02466（D － t）t（specific gravity 7.85g/cm3）
1030
1025
SAE J403
(carbon steel)
Remarks
0.30
1017
1040
1050
1035
1023
1045
1038
1055
1049
（D － t ）
⑵ Cross-section（cm2）　A ＝π
t
π
｛
64
｝
1033
⑶ Moment of inertia of area（cm4）　I = ─ D4 －（D － 2t）4
π
1042
32D｛
1
2
2
⑸ Radius of gyration of area（cm）　i = ─
4 D +（D － 2t）
D：Pipe outside diameter（cm）
t ：Pipe thickness（cm）
⑷ Modulus of section（cm3）　Z = ─ D4 －（D － 2t）4｝
SCr420TK
JIS G3441
(alloy steel)
SCM415TK SCM420TK
SCM430TK SCM435TK SCM440TK
SCM418TK
SAE J404
(alloy steel)
4120
4130
4135
4140
21
Pipe & tube plant of Nippon Steel & Sumitomo Metal
Head Office,
regional offices and branch offices
10
1
13
14
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3
15
9
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4
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6
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3
5
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17
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7
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6
6
7 1
2 1
5 2
9
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