Qatar Steel Product Specifications and Sizes

DRI – 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.
Product and Product Quality

DRI Specification

Chemical Composition
	Guaranteed	Expected
Total Iron (T. Fe)	91.0% Min	92.0%
Metallic Iron (M.Fe )	85.0% Min	86.0%
Metallization	93.0% Min	94.0%
Carbon (C)	2.20% Min	2.40%
Phosphorous(P)	0.06% Max	0.04%
Sulphur (S)	0.01%Max	0.002%
Total Gangue (CaO+Al₂O₃+MgO+siO₂)	4.8%Max	4.20%

Physical Analysis
BulkDensity(Tons/M3)	1.6~1.9
Size Under 5 mmat Loading Port	5.0%Max

Material Safety Data Sheet (MSDS)
MSDS for DRI

Hot Briquetted Iron (HBI)

HBI Specifications

Chemical Composition	Guaranteed	Expected
Total Iron (T. Fe)	91.0% Min	91.5%
Metallic Iorn (M.Fe)	85.0% Min	85.5%
Metallization	93.4% Min	93.9%
Carbon (C)	1.3% Max	1.1%
Phosphorous (P)	0.050% Max	0.04%
Sulphur (S)	0.005% Max	0.001%
Total Gangue (CaO+Al₂O₃+MgO+SiO₂)	4.8% Max	4.20%

Physical Analysis
Bulk Density (Ton/M³)	2.4 ~ 2.7
Apparent Density (Ton/M³)	4.9 Min
Average Size (mm)	106 x 48 x 32
Size Under 1/4 Inch at Loading Port	5.0% Max

Steel Billets

Although some of the billets produced at Qatar Steel are sold directly to customers, most are processed into bars in 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.

Permissible variations from specified ranges and marketing’s are tabulated.

Product and Product Quality

Steel Billet Specification

Chemical Composition
	(As per below or as per customer requirement)
	Chemistry	%C	%Si	%Mn	%P	%S	N(ppm)
		0.15~0.25	0.12~0.20	0.60~0.80	0.035max	0.035max	120 max
Note: Tramp Elements (Ni + Cr + Cu + Mo) = 0.30% max

Physical Parameters

	Sr. No.	Item	Acceptance Criteria
	1.	LENGTH	3.8 meter to 12 meter (± 50mm) for 150 x 150mm² section) 6.0 meter to 12 meter (± 50mm) for 130 x 130 mm² section)
	2.	SECTION	150 x 150mm² or 130 x 130mm²
	3.	FACE LENGHT	± 3mm
	4.	RHOMBODITY	5% Max
	5.	CORNER RADIUS	8mm
	6.	STRAIGHTNESS	Camber 5mm/meter
	7.	BENDING	Not more than 5mm in 1 meter Not more than 30mm in 6 meter Not more than 60mm in 12 meter
	8.	ANGULAR TWIST	Not more than 1º / meter and Not more than 6º over 12 meter length.
	9.	CUTTING	Both ends will be Gas Cut
	10.	IDENTIFICATION	At the end of each billet cast number will be stamped or written by paint
	11.	SURFACE & INTERNAL QUALITY	The billets will be free from surface imperfections which impair the product quality such as longitudinal cracks, transverse cracks, Deep ripple mark, scab & thick scale, slag patches, surface blow holes & Internal quality should be free from harmful defects such as subsurface pinholes, blow hole, pipes, voids, and internal crack. As Qatar Steel have open casting process, chances of minor surface pinholes is there and it will not impair the product quality.
Note: % Rhombodity = [(D_Max – D_Min)/ D_Max] * 100

Reinforcing Steel Bars (Rebars)

Advanced technology to meet the market requirements and superior surface quality are some of the prominent features of Qatar Steel’s rebar.

Product and Product Quality

Rebar Specifications

Bend and Rebend tests are performed as specified inrespective standards using proper mandel diameters
Rub/Surfaces geometry and weight tolerance are maintained as per the relevant product standards

Technical Features

SS560 Gr B500B / CS2:2012 Gr 500B/ BS4449:2005 Gr B500B /QS BS 4449:2005 Gr B500B rebars are produced with low carbon equivalent & weldable, whereas ASTM A615 Gr60, Gr75, Gr80, ASTM A706 Gr 60, QS600, ISO 6935-2 B500B-R and SASO ASTM A615:2018 are Non-Weldable.
BS 4449:2005 Gr B500B rebars have High Strength compared to ASTM A615 Gr 60 which reduces steel consumption & congestion in structure, which in turn reduces overall cost of the project.

BS 4449:2005 Gr B500B rebars have better bend performance, due to severe bend & re-bend angle. Rebars confirming to BS 4449:2005 specification are subjected to fatigue testing and passed minimum 5 million stress cycles
QS 600 with yield strength > 600 MPa. Over the years, rebar with yield strength 420 MPa, 500 MPa etc., confirming to BS 4449 / ASTM A615 specification were available in Qatar/GCC region. Rebar with higher strength i.e., YS > 600 MPa will reduce the steel consumption by around 20% in construction, which in turn lowers the overall cost of structure and also lead to reduction in column size of heavily loaded structure.

Rebar Marking

Deformed bars produced at Qatar Steel conform to various national and international standards such as, BS 4449:2005 Grade B500B/Grade B500C (Nuclear Grade & British)/QS BS 4449:2005 Grade B500B, SASO ASTM A615:2018, ASTM A615 Grade 40/Grade 60/Grade 75/Grade 80 (American) & QS 600 (Qatar Steel High strength rebar).

The registered trade mark ‘QS’ is embossed on every rebar at an interval of about one meter along with the relevant identification marks

Wire-Rod and Re-Bar In Coils

Product and Product Quality

Products	Size – MM
Product Size
Wire Rod	5.5	6.0	6.5	7.0	8.0	9.0	10	11	12	14	16	–
Rebar in Coil	—	—	—	—	8.0	–	10	–	12	14	16	–

Wire Rod Grades: SAE1006/ SAE1008/ SAE1012/ SAE1018/ SAE1042/ SAE 1045/ SAE1060/ SAE1065/SAE1070/ SAE1080

Coil Weight & Dimension	Metallurgical Standard
Rebar in Coil: ASTM A615 GR60/ BS4449:1997: GR460B / BS4449:2005 GRB500B / ISO 6935-2
Inner Diameter (MM): 850 – 950	Decarburization : 1% max of wire rod diameter
Outer Diameter (MM): 1100-1200	Surface Defect : 1% max of wire rod diameter
Coil Weight (Kg) : 1050 -1200	Cold Up-settability : 67% (Billet route )

Grade	%C	%Mn	%Si	%P	%S	Ys-N/mm²	Ts-N/mm²	%El	%Agt.
Chemical & Mechanical Properties
SAE 1006	0.08 Max.	0.25 – 0.40	0.15 Max	0.035 Max	0.025 Max	240 – 290	340 – 415	35 Min	–
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 1012	0.10 – 0.15	0.30 – 0.60	0.15 Max.	0.035 Max	0.025 Max	275 – 325	400 – 475	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 A615 GR60	0.22Max.	0.60 – 1.00	0.35 Max	0.035 Max	0.025 Max	420 Min.	620 Min.	9 Min.	–
BS4449: 1997 GR460B	0.22Max.	0.60 – 1.00	0.35 Max	0.035 Max	0.025 Max	460 Min.	Ys x 1.08. Min	14 Min.	5% Min
BS4449 :2005 GRB500B	0.22Max.	0.60 – 1.00	0.35 Max	0.035 Max	0.025 Max	500-650.	Ys x 1.08 Min.	–	5% Min

Standard	Wire Rod Size (mm)	Tolerance +/- (mm)	Out of Round (mm)	Remarks
Dimensional Tolerances of Wire Rods:
QS FZE	5.5 – 16.0	0.20	0.30 MM	QS FZE Tolerance is Half of ASTM Tolerance
ASTM A510	5.5 – 16.0	0.40	0.60 MM	General requirements