steel billets

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IN ITS EFFORTS TO MEET THE
GROWING DEMAND FOR STEEL
IN THE COUNTRY AND IN THE
REGION, THE COMPANY IS
MAKING GIANT STRIDES IN
STEEL PRODUCTION
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C O M PA N Y P R O F I L E
ADDING STRENGTH TO REGIONAL INFRASTRUCTURE
Qatar Steel Company was formed in 1974 as the first integrated steel plant in the Arabian Gulf. Commercial
production commenced in 1978 with the company becoming wholly owned by the Government of Qatar in 1997.
Today, Qatar Steel is widely recognized as a foremost
leader in the steel industry, extending its pioneering
commitment from an expansive mill site located in
the heart of the progressive Mesaieed Industrial
City - 45 kilometers south of the nation’s capital,
Doha. The Company also operates a UAE based
subsidiary - Qatar Steel Company FZE.
Today the plant with its offices occupies an area of
707,000 sq. meters, adjacent to which is a further
375,000 sq. meters plot reserved for future
developments. The total employee-base of over
1,650 spans 12 different nationalities, and the mill
runs on a 3-shift system.
Inspired to meet the growing demand for steel in
Qatar as well as the region in general, Qatar Steel
has embarked upon a series of initiatives aimed at
increasing its production capacity. The ongoing
modernization and technically advanced expansion
projects are designed to produce world class
products, which will further enhance the company’s
presence in the world of steel production.
FACILITIES IN DUBAI
Plant facilities have come to include a Midrex process
based DRI/HBI Combo Mega Module, Electric Arc
Furnaces with a Ladle Refining Furnace, a Continuous
Casting plant and Rolling Mills with the latest
automated features. Other auxiliaries include wellequipped Jetty facilities, a Main Power Substation,
Quality Control Center, Maintenance Shops and
facilities for sea/fresh water, compressed air, natural
gas and a Clinic.
Qatar Steel Company FZE, formerly QASCO Dubai
Steel FZE was established in August 2003 to meet
the growing demand for high-quality steel wire-rod
products within the GCC as well as in international
markets.
The company operates two primary facilities at
its 60,000 Sq. meter Jebel Ali Free Zone site: An
upgraded Wire Rod Mill with an installed capacity
of 240,000 metric tonnes [MT] per annum and the
present Rebar Mill with an annual capacity of 50,000
MT. The latter is soon to be replaced by a modern
new Bar Mill from VAI–POMINI with a 300,000 MT
capacity.
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DIRECTOR AND GENERAL MANAGER’S
MESSAGE
Over the years, we at Qatar Steel have successfully forged a remarkable reputation for our enterprise
by establishing unrivalled quality, flexibility and reliability in all our product and service offerings.
Central to this achievement has been our drive to exceed our customers’ expectations.
Today, as our business grows to shape new horizons for both our own people and the communities
which we serve, we remain committed to our philosophy of producing high quality products which
comply with the highest international standards, developing mutually beneficial partnerships with
our customers, investing in human capital, and maintaining our stance as good corporate citizens.
Having taken steps towards pre-empting the growing demand for steel in the region, our expansion
projects are in full swing and will bring our annual production of DRI to 2.3 million tons, molten
steel production to over 1.5 million tons and rebars to over 1.5 million tons in Qatar. Similarly,
substantial investments have been made in Dubai to increase production of existing wire rod mill
from 180,000 MT to 240,000 MT and re-bars from 50,000 MT to 300,000 MT through installation
of a new bar mill.
As a premier player in the region’s steel industry with ambitious growth plans in a competitive
market environment, we have embraced the task of re-branding ourselves externally and internally,
in order to prepare for all our future endeavors. Through the promise of making steel matter, Qatar
Steel will continue to strive not only to maintain but enhance its reputation by a process of continuous
improvement in every area of its operations.
As an existing or potential customer, your unstinted support is highly valued as we continue to grow
and participate in the development of the steel industry.
Sheikh Nasser Bin Hamad Al-Thani
Director & General Manager
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VISION, MISSION AND VALUES
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QATAR STEEL HAS GAINED A REPUTATION AS A
MANUFACTURER OF SUPERIOR QUALITY PRODUCTS,
DESIGNED TO MEET INTERNATIONAL STANDARDS.
THE PRODUCTS ARE USED IN MAJOR PUBLIC AND
PRIVATE PROJECTS IN THE REGION, MAINTAINING ITS
ACTIVE PRESENCE IN THE GCC IN ADDITION TO BEING
THE MAJOR PLAYER IN THE DOMESTIC MARKET. OUR
PRODUCTS ARE DISTRIBUTED THROUGH A STRONG
NETWORK OF TRADERS IN THE REGION, WHO IN
TURN SUPPLY THEM TO PROJECT OWNERS/END USERS
IN THEIR RESPECTIVE MARKETS.
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S E T T I N G S TA N D A R D S F O R
C U S T O M E R S AT I S F A C T I O N
Strong foresight, diligent market intelligence and efficient execution of plans have been the essence of
Qatar Steel’s efforts to stay ahead of competition on product, price, delivery and other service offerings.
The company ensures high sales performance year after year,
drawing strength from maintaining close relationships with its
customers. While a robust technological network facilitates
efficient handling of order management, the company’s sales
and shipping operations complement each other by meeting
all customer expectations ensuring efficient, reliable and prompt
delivery of material.
As part of its relentless efforts to offer the best service to its
customers, the marketing wing conducts regular market visits
involving feedback sessions, customer satisfaction surveys and
promotional activities. It also promptly redresses grievances,
if any, through an efficient Customer Relationship Management
(CRM) section.
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BY CHARGING OXIDE PELLETS,
DRI/HBI ARE PRODUCED
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DIRECT REDUCTION PLANT
Qatar Steel has adopted the gas based Direct Reduction process technology in its integrated steel complex for
iron-making. Its MIDREX process DR Module (DR1), built and commissioned in August 1978 was the first-ofits-kind in the region with a capacity of 400,000 tons.
In its thirty years of operations, the company’s production has continuously increased and from 2004 onwards exceeded 800,000 tons
annually. This was accomplished by leveraging the inherent capabilities of the equipment, marginal investments in balancing bottlenecks,
upgrading the equipment to meet greater efficiencies, along with various other procedural and operational improvements.
CAPACITY EXPANSIONS
A green field DRI/HBI combo dual discharge 1.5MMTY module
(DR2) is currently undergoing equipment trails to go into
commercial production by April 2007. This plant incorporates
all the features found on an up-to-date Midrex plant. In addition,
the plant uses Simpax - An automated level-2 quality control
module.
SALIENT FEATURES OF SPONGE IRON FROM
DR1/DR 2
Selective premium DR Grade pellets with low elements and
gangues are sourced to produce consistently high metallized
CDRI & HBI.
DR1 produces CDRI exclusively for captive consumption. The
metallization percentage is 93-95% with 1.6% – 2.2% carbon.
The plant consistently achieved >95% availability with >99.7%
operational reliability.
DR2 is equipped to facilitate the manufacturing of HBI and
CDRI. The CDRI produced will contain metallization of 92%94% with 1.8% – 2.5% carbon. HBI produced in DR 2 will offer
metallization of 91%-92% and 1.3%-1.8% carbon.
Steady state operations are expected to result in extremely
consistent quality of DRI & HBI.
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WELL - EQUIPPED JETTY IN CLOSE
PROXIMITY TO PRODUCTION FACILITIES
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ELECTRIC ARC FURN A CE
Qatar Steel has embarked upon various projects with a systematic
approach for improving the productivity of all its operations.
At present Qatar Steel has 3 UHP Electric Arc Furnaces of 80
tons capacity each; two of them are conventional launder type
tapping, equipped with 50 MVA. The third EAF, is EBT type and
split shell design, with a transformer capacity of 70 MVA. A ladle
refining furnace (LRF3) has been installed for the EAF in order
to produce quality steel as well as to increase productivity. LRF3
is in operational since November 2006, due to which the tap
to tap time is reduced from 75 minutes to 60 minutes per
charge. With the installation of a HiJet for EF3 for carbon and
oxygen injection very soon will further reduce tap to tap time.
With the additional of this LF3 and HiJet the production figure
of EF3 will reach a production capacity of 622,000 tons per year.
One more EAF (EF2R) is scheduled to start by May 2007 along
with another Ladle Refining Furnace (LF2R), and a Continuous
Casting Machine (CC2R). This unit will ensure a production
capacity of 666,000 tons per year.
Also it is planned to install one more EAF/CC of 160 tons
capacity state of the art EAF in a green field adjacent to the new
DR with an annual capacity of 1.25 million tons per year which
is expected to be in operation by June 2009.
In order to increase the productivity
• A gunning robot is installed in EF3 which enabled Qatar
Steel to increase the furnace availability. Another unit is
planned for EF2R during the year 2007.
• Installation of PYTOM - the online measurement of
temperature and molten steel analysis is planned during the
year 2007 to further reduce the tap to tap time thereby
increasing productivity. The expected benefits are on-line
control of the EAF process, possibility of on-demand
temperature adjustment, less oiling & re-blows, molten steel
analysis online, less stress on refractories becuase overheating
can be prevented completely.
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THE BILLETS ARE CUT
AUTOMATICALLY BY
GAS CUTTING EQUIPMENT
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CONTINUOUS CASTING PLANT
The Casting Plant is equipped with four Continuous Casting Machines of four strands each with a total capacity
of 1.8 million tons per year.
The Continuous Casting Plant is equipped with 4 casting machines of 4 strands each.
No.1 and No.2 machines are straight mould type.
The size of billet is:
• 150 x 150 mm square at a speed of 1.8 to 2.2 meters/minute
Billets are cut to the length 3~4 meter by hydraulic shear and
transferred to Rolling Mill to produce the plain and deformed bars.
No.3 machine commissioned in January 2000 is also
of 4 strands but of curved mould type.
The sizes of billets are:
• 150 x 150 mm square at a speed of 1.8 to 2.6 meter/minute
• 130 x 130 mm square at a speed of 2.6 to 3.5 meter/minute
No. 4 machine (CC2R) which will be commissioned
in June 2007 is of 4 strands with curved mould.
The sizes of billets are:
• 200 x 200 mm square at a speed of 1.45 meter/minute
• 150 x 150 mm square at a speed of 2.6 meter/minute
• 130 x 130 mm square at a speed of 3.5 meter/minute
Billets from No.3 machine and CC2R are cut to 3~14 meters
by gas cutting equipment in each strand. A charge number is
punched on each billet by a marking machine and forwarded for
further processing to rolling mill/billet customers.
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CONTINUOUS CASTING PLANT
PRODUCTION CAPACITY
1.8 million tons per year
STRANDS
Four Machines of 4 strands each
TYPE
Two Low Head Straight Mould
One 8 M Radius Curved Mould
BILLETS SIZE
130 x 130
3.5~12 Meters
150 x 150
3~12 Meters
200 x 200
3~14 Meters
SALIENT FEATURES OF THE PLANT
-
On line Tundish Nozzle change system has been implemented in all the three Continuous Casting machines in order to
increase the sequence of Continuous Casting Operation and CC Yield.
-
Slide gate system of Vesuvius LV11 is introduced to ensure higher safety in operation and to reduce the running cost.
-
Ladle shroud Manipulator is introduced for low carbon steel making in No.3 CC machine.
-
Electro-magnetic stirrer will be installed in CC3, to improve quality of billets.
-
By routing the heats through Ladle Furnace, the super heat is reduced in casting.
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THE ROLLING MILL EPITOMISES
QUALITY AND PRODUCTIVITY
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ROLLING MILLS
BAR MILLS
The Rolling Mill is a tandem type mill consisting of Re-heating Furnace, Roughing, inter, and finishing strands. The mill is designed to
produce bars ranging from 10-25 mm plain bars and 10-40 mm deformed bars.
The mill’s capacity was designed to produce 330,000 MT; however various modifications have ensured double this capacity since start
up. Furthermore, a High Speed Finishing Bar Mill was commissioned in 1996, contributing to the expansion of the old mill and adding
the 8 mm size to increase the annual production capacity to 750,000 tons.
Qatar Steel Rolling Mill produces finished products, in keeping with its commitment to quality and productivity. The required billets
are received from the Continuous Casting shop, pre-heated in a Re-heating Furnace and rolled to different sizes.
To minimize the Mill’s down time and production costs, Qatar Steel Rolling Mill implemented the PLC control system in the Re-heating
Furnace, mill motors, and the auto counting machine. Moreover, a straightening machine was installed in 2005 to straighten deformed
coils of 8-12 mm as per the demands of the market place.
Qatar Steel has commissioned its ultra-modern Rolling Mill from VAI POMINI, which will enable an increase in its annual production
to 1.5 million tons of reinforcement bars.
In its facilities in Dubai, a new Bar Mill from the same source with the latest automation features is currently being set up with a capacity
to produce 300,000 metric tons of deformed bars ranging from 8-40 mm in 12 meter straight lengths.
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ROLLING MILLS
WIRE ROD MILL - DUBAI OPERATIONS
The wire rod mill employs world class technology supported by the renowned MORGAN, DANIELI, SIEMENS & MESTA with outstanding
technical features including 40 T/hr reheating furnace with automatic temperature control.
Wire Rod mill with latest automation features, is capable of rolling low carbon, low alloy steel, high carbon, and cold head quality wire
rods of sizes 5.5 to 12 mm along with re-bars in coils of sizes 8 to 12 mm.
MILL LAY OUT:
ROUGHING MILL - 9 Stands + Shear
INTERMEDIATE MILL - Repeater + 6 Stands + 3 Loopers
PRE-FINISHING MILL - 2 Stands H-V ( MORGAN ) + 2 Loopers + Shear
FINISHING MILL - 10 Stand - No Twist Mill (NTM)-MORGAN - U.S.A
WATER BOXES - With Equalization Zones
SPECIAL FEATURE - Stelmor Conveyor - 6 independent zone, REFORM TUB with ring distributor - Morgan U.S.A.
COIL COMPACTOR - Auto & Manual
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QUALITY ASSURANCE
Qatar Steel quality assurance system has been established to
impact its operations across the board, from order placements
to shipment of products.
All products including reinforcing bars and wire-rods are
manufactured from select raw materials with definite chemical
compositions and ensured quality. Inspections are conducted
throughout the manufacturing process to ensure compliance to
customers’ requirements. Qatar Steel has also established Quality
Control Laboratories which are equipped with the latest testing
and analytical instruments, such as an Optical Emission
Spectrometer, XRF, Oxygen and Nitrogen analyzers and
computerized testing machines.
We assure uniform quality which satisfies all local and international
requirements. Qatar Steel’s Quality Management System meets
ISO 9001:2000 standards.
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SAMPLE TESTING TO ENSURE
PROCESS CONTROL
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QUALITY ASSURANCE
NEW TECHNOLOGY/INNOVATIONS
THIRD PARTY CERTIFICATIONS
Qatar Steel produces high strength reinforcing bars by exclusive
micro-alloying with vanadium. In order to remain cost effective,
niobium was introduced successfully to improve the strength
and ductility of our steel reinforcing bars.
Consistent with Qatar Steel’s resolve of ensuring the quality
of its products, reinforcing bars manufactured at facilities in
Mesaieed and Dubai have received many prestigious
accreditations, including JIS and UK CARES. The Company
satisfactorily operates a Quality System which complies with
the requirements of BS EN ISO 9001:2000 and the relevant
CARES Quality and Operations Assessment Schedules.
A ladle furnace ensures greater homogeneity of steel, resulting
in greater uniformity of the mechanical properties and chemical
compositions of our reinforcing bars. A thermo-mechanical
process will be adopted shortly to produce reinforcing bars
of varying standards in the new rolling mill (RM 2) improving
cost efficiency.
Qatar Steel is certified as a quality manufacturer and supplier
of products conforming to BS4449:1997 Grade 460B.
BS4449:2005. Grade 500 will be introduced immediately
following the commissioning of the new rolling mill.
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UNLIKE SCRAP BASED STEEL PLANTS WHICH FACE
EMISSION-CONTROL PROBLEMS RESULTING FROM
HEAVY METALS AND TOXIC CHEMICALS, QATAR STEEL
DILIGENTLY COMPLIES WITH REGULATIONS THAT
PROMOTE ENVIRONMENTAL CARE. OUR PRODUCTION
IS BASED ON DRI,WHICH EMPLOYS THE CLEANEST RAW
MATERIALS. AN EXTERNAL ACCREDITED
LABORATORY HAS CONFIRMED OUR
ABILITY TO MAINTAIN VERY LOW
LEVELS OF HEAVY METAL AND DIOXIN
EMISSIONS.
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THE ENVIRONMENT
ENVIRONMENT MANAGEMENT PROGRAM
ISO 14001:2004
In addition to spearheading our environment friendly
expansion plans, our Environment Section
coordinates various projects with internal
departments under an Environment Management
Program. The company s most significant
environmental contribution is centered on diffusing
dust emissions, which to a large degree are the
results of technology utilized in the 1970 s. The
revamping of our dust collection system in our
existing facilities is within the scope of these projects.
Qatar Steel migrates to the new environmental ISO
14001:2004 standard as another landmark move
towards these globally accepted environment
standards. The alignment of environmental
objectives, targets and programs with the corporate
HSE objective were considered significant
achievements during this transition. We succeeded
in defining our communication with interested
parties, establishing an effective internal audit
system and reviewing its performance with the top
management. Our success has inspired us to proceed
with the development of an integrated management
system in the near future.
As a part of waste management, Qatar Steel
continues to study various options to re-using / recycling its production waste. Palletizing DR product
dust and EF dust, recycling of Refractory bricks and
extracting iron from slag are some of the programs
under progress. The utilization of used tyres as a
carbon source in the steel melting process is an
achievement in the right direction. This project may
be able to contribute to solving or reducing a major
community waste problem.
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QATAR STEEL MANUFACTURES WORLD-CLASS
PRODUCTS IN ACCORDANCE WITH THE HIGHEST
INTERNATIONAL QUALITY STANDARDS. ALL
PRODUCTS ARE SUPPORTED BY EFFECTIVE AND
RELIABLE DELIVERY AND AFTER SALE SERVICES.
OUR CLOSE PROXIMITY TO NEIGHBORING GCC
COUNTRIES ENABLES US TO CATER TO A SIZEABLE
PORTION OF THE REGIONS’ REQUIREMENTS, AS
WELL AS QATAR’S OWN DOMESTIC NEEDS.
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P R O D U C T S P E C I F I C AT I O N S
SPONGE IRON
Our DRI Analysis shows high metallization and low gangue, which meet the requirements of steel
making operation. The typical quality of sponge produced from MIDREX plant at Qatar Steel.
S. No
Item
Value (%)
Remarks
CHEMICAL COMPOSITION
1
Total Iron T. Fe
92.20 Min
2
Metallic Fe
87.60 Min
3
Metallization
95.00 Min
4
Carbon
1.45 Min
5
SiO2
1.65
6
CaO
1.59
7
MgO
0.73
8
MnO
0.13
9
P
0.03 Max
10
Al203
0.55
11
TiO2
0.130 Max
12
V2O5
0.180
13
S
0.001 Max
14
Cu
0.003 Max
SiO2+Al203 = 2.2 max.
CaO + MgO = 2.32 max.
PHYSICAL CHARACTERISTICS
1
Size
> 3.36 mm
Rest
2
Fines
<= -3.36 mm
Up to 1% is acceptable
3
Compression
strength
70 kg/P Min
P stands for Piece
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P R O D U C T S P E C I F I C AT I O N S
HOT BRIQUETTED IRON (HBI)
S. No
Item
Value (%)
1
Total Iron T. Fe
92.0
2
Metallic Fe
84.64
3
Metallization
92.0
4
Carbon
1.3
5
P
0.045 (Max)
6
S
0.003 (Max)
7
Total Gangue
4.0 (Max)
CHEMICAL COMPOSITION
PHYSICAL CHARACTERISTICS
1
Bulk Density (Ton/M3)
2.4 ~ 2.7
2
Apparent Density (Ton/M3)
5.0 (Min)
3
Average Size (mm)
106 x 48.4 x 32
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CONTINUOUS CASTING IS USED TO
MANUFACTURE UNIFORM AND CLEAN
EFFICIENTLY
BILLETS QUICKLY AND EFFICIENTLY.
STEEL BILLETS
Although some of the billets produced at Qatar Steel are sold directly to customers, most are processed into bars in one of our rolling
mills. We supply high quality steel billets of various cross-sections and sizes, which enable us to meet the customer requirements and
industry specifications, including ASTM, JIS and CNS.
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P R O D U C T S P E C I F I C AT I O N S
Permissible variations from specified ranges and makings are tabulated:
1. Chemical Composition and Mechanical properties
As per International Standard/other chemical composition at options
2. SIZE RANGE
Cross Section
130 mm X 130 mm
150 mm X 150 mm
Weight
132 kg/meter for 130 mm X 130 mm
175 kg/meter for 150 mm X 150 mm
Length
3.5 meter to 12 meter
Nominal Corner Radius
6 mm max. for 130 mm X 130 mm
8 mm max. for 150 mm X 150 mm
3. ALLOWABLE VARIATION ON SIZE
Face Length
Difference in Diagonals
Cut Length
Bending
Rhombodity
Angular twist
Straightness
Billet ends
Surface Quality
Short Length
± 3 mm
< 8 mm
± 50 mm
Not more than 5 mm in 1 meter
Not more than 30 mm in 6 meter
Not more than 40 mm in 12 meter
Any two adjacent faces to be within 2 degree of a right angle.
Not more than 1 degree per meter and not more than 6 degree over
12 meter length. (No. twist will be preferable)
Camber 5mm/meter
Billet ends to be cut at right angles with surface roughness within 2 ~ 4 mm
Free from deep crack (not longer than 20 mm and not deeper than 0.5 mm)
Free from surface pin hole (diameter not more than 4 mm and not deeper
than 3 mm).
Free from oscillation mark (not deeper than 0.6 mm)
Not more than 5% of the total order weight
4. IDENTIFICATION
Marking
At the end of billet, cast number is to be stamped/hand written.
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DEFORMED BARS
Hot Rolled Deformed Bar is the core production between our melting and finishing operation. Our deformed bars geometry such as
knots and ribs, their height, width, shape and spacing are well controlled during grooving and rolling to give maximum bond strength
without affecting bendability and fatigue strength.
CHEMICAL COMPOSITION %
QATAR STEEL
STANDARD
QD 30
C
max
--
MN
max
--
P
max
0.050
MECHANICAL PROPERTIES
S
max
0.050
Yield
strength
(kg/mm2)
minimum
Tensile
strength
(kg/mm2)
minimum
Elongation (%)
minimum
Test Piece
(GL)
30
49
14
No.1
18
No.2
BEND TEST
Bending Angle
Degree
Bending
Diameter
180
Rated Dia. x 3.5
QD 43
--
1.80
0.050
0.050
43
64
12
200mm
180
<=D16 Rated Dia x 3.5
>D16 Rated Dia x 4
QD 47
0.25
--
0.050
0.050
47
1.08 x
Actual YS
14
5D
180
Rated Dia x 3
No.1 Test Piece: The gauge length shall be 8 times the diameter of steel bars up to 25mm in nominal diameter.
No.2 Test Piece: The gauge length shall be 4 times the diameter of steel bars above 25mm in nominal diameter.
Rebend Test for QD 47 is required.
TOLERANCE ON DIMENSION
MASS
LENGTH
34
LENGTH
TOLERANCE
up to 7m
+ 40mm - 0mm
over 7m
+ 50mm - 0mm
SIZE
D20 & under
D22 to D30
D32 to D40
TOLERANCE
Single Piece
One Set
± 6%
± 5%
± 4%
± 5%
± 4%
± 3.5%
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P R O D U C T S P E C I F I C AT I O N S
NOMINAL DIMENSIONS, WEIGHT & TOLERANCE ON KNOTS
Designation
Nominal
Dia. (d)
(mm)
Nominal
Cross
Sectional
Area (mm2)
Unit Mass
(kg/m)
Maximum
Average
Knot Space
(mm)
Height of Knots
Min
Max
(mm)
(mm)
Ltgd/Ri
Width
(mm)
Nominal Mass Kg/Piece
6m
9m
12m
D8
8
50.27
0.395
5.6
0.3
0.6
3.14
2.37
3.56
4.74
D10
10
78.54
0.617
7.0
0.4
0.8
3.9
3.70
5.55
7.40
D12
12
113.1
0.888
8.4
0.5
1.0
4.7
5.33
7.99
10.66
D14
14
153.9
1.21
9.8
0.6
1.2
5.5
7.26
10.89
14.52
D16
16
201.1
1.58
11.2
0.7
1.4
6.3
9.48
14.22
18.96
D18
18
254.5
2.00
12.6
0.8
1.6
7.1
12.00
18.00
24.00
D20
20
314.2
2.47
14.0
1.0
2.0
7.9
14.82
22.23
29.64
D22
22
380.1
2.98
15.4
1.1
2.2
8.6
17.88
26.82
35.76
D25
25
490.9
3.85
17.5
1.3
2.6
9.8
23.10
34.65
46.20
D28
28
615.8
4.83
19.6
1.4
2.8
11.0
28.98
43.47
57.96
D30
30
706.9
5.55
21.0
1.5
3.0
11.8
33.30
49.95
66.60
D32
32
804.2
6.31
22.4
1.6
3.2
12.6
37.86
56.79
75.72
D36
36
1017.4
7.986
25.2
1.8
3.6
14.1
47.92
71.87
95.83
D40
40
1256.6
9.864
28.0
2.0
4.0
15.7
59.18
88.78
118.37
MARKING
JIS G3112 SD 295A
QD30 (ASTM A615 GR40)
The bars with one dot represent
QD30
QD43 (ASTM A615 GR60)
The bars with two dots
represent QD43/QD43S
QD47 (BS4449:1997 GR460)
As per ‘CARES’
Deformed bars produced at Qatar Steel conform to various national and international standards such as, QD30/QD43/QD 47
[Qatar], BS 4449: 1997 Grade 460 [British], SSA 2/1992 [Saudi High Tensile ], ASTM A615 Grade 40/Grade 60 [American] and
JIS G3112 SD 295 A [Japanese].
The registered trade mark ‘QATAR STEEL’ is rolled on every deformed rebar at an interval of about one metre, along with all
identification marks.
ALLOWABLE LIMIT OF KNOTS
Average Spacing of Knots
Height of Knots
Width of longitudinal ribs
= 1/10 (p1+p2+. . .+p10)
= 1/3 (h1+h2+h3)
= g1+g2
p - spacing
h - height
g - gap
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P R O D U C T S P E C I F I C AT I O N S
WIRE-ROD AND RE-BAR IN COILS
PRODUCT SIZE :
STEEL GRADES :
5.5 MM to 12 MM ( Wire Rods )
8.0 MM to 12 MM ( Rebar in Coil )
SAE 1008 / SAE 1012 / SAE 1018 / SAE 1042 / SAE 1060 / SAE 1065 / SAE 1070 / ASTM GR60/BS4449; GR460
(Other grades as per customer specification)
COIL WEIGHT & DIMENSIONS:
METALLURGICAL STANDARD:
Inner Diameter (mm) :
Outer Diameter (mm) :
Coil Weight
(Kg) :
Decarburization
Surface Defect
Cold Upsettability
850 – 950
1100-1200
1100 - 1200
:
:
:
1% max of wire rod diameter
1% max of wire rod diameter
67% (Billet route)
MECHANICAL PROPERTIES OF WIRE RODS AND REBARS
GRADE
%C
%Mn
%Si
%P
%S
Ys-N/MM2
Ts-N/MM2
%El
SAE 1008
0.06-0.10
0.30-0.50
0.15 Max
0.035 Max
0.025 Max
250-300
350-425
30 Min
SAE 1018
0.15-0.20
0.60-0.90
0.10-0.35
0.035 Max
0.025 Max
300-350
450-525
22 Min
ASTM GR60
0.35-0.40
1.30-1.50
0.17-0.25
0.035 Max
0.025 Max
420 Min.
620 Min.
9 Min.
BS4449;
GR460
0.25 Max.
1.60 Max.
0.60 Max
0.035 Max
0.025 Max
460 Min.
600 Min.
14 Min.
DIMENSIONAL TOLERANCES OF WIRE RODS IN COMPARISON WITH
INTERNATIONAL STANDARD:
STANDARD
WIRE ROD SIZE
MM
TOLERANCE
MM +/-
OUT OF ROUND
MM
QATAR STEEL
COMPANY FZE
5.5 - 12.0
0.20
0.30 MM
ASTM A510
5.5 - 12.0
0.40
0.60 MM
REMARKS
QATAR STEEL COMPANY FZE
Tolerance is Half of ASTM Tolerance
ASTM, A510 Specification for
Wire-Rods-General requirements
COIL IDENTIFICATION
Each coil will have unique coil number along with Heat number/Charge number printed on high temperature withstanding,
acid proof metallic tags.
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