Products

Deformed Bars

Micro Alloyed & Quench and self temp deformed bars are the core production of Qatar Steel. QS deformed bars geomatry such as knots and ribs,their hight,width,shape and spacing are well controlled during grooving and rolling to give maximum bord strangth without affecting bendability and fatigue strength.

Chemical Composition %								Mechanical Properties					Bend Test		Rebend Test
QATAR STEEL STANDARD	C max	Mn max	P max	S max	Cu max	N max	*CE max	Yield Strength N/mm2(Mpa) min	Tensile Strength N/mm2 (Mpa) min	Elongation % min	Agt % Min	Test Piece (GL)	Bending Angle Degree	Bending Diameter mm	Bending Angle Degree	Bending Diameter mm
EQUIVALENT TO ASTM A615 GR40	-	-	0.050	0.050	-	-	-	280	420	10mm-11 >10mm-12	-	No.1 No.2	180	Rated Dia x 3.5
EQUIVALENT TO ASTM A615 GR60	-	1.80	0.050	0.050	-	-	-	420	620	10-20mm-9 22&25mm-8 >25mm-7	-	200 mm	180	≤D16 Rated Dia x 3.5 D18-D25 Rated Dia x 5 ≥D28 Rated Dia x 7
SSA 2/1992	0.33	-	0.050	0.050	-	-	0.54	460	506	12		200mm	180	Rated Dia. x 3	45 to 23	Rated Dia. x 5
BS4449: 1997 GR460B	0.25	-	0.050	0.050	-	0.012	0.51	460	YS x 1.08	14	5.0	5d	45		45 to 23	≤D16 Rated Dia x 5 >D16 Rated Dia x 7
BS4449: 2005 GRB500B	0.22	-	0.050	0.050	0.80	0.012	0.50	500	YS x 1.08	-	5.0	-	90		90 to 20	≤D16 Rated Dia x 4 >D16 Rated Dia x 7

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
*CE= C + Mn + Cr+Mo+V + Ni + Cu                   6           5                15

Tolerance On Dimension
Length			Mass
Length	Tolerance		SIZE	ASTM	SSA	BS 460B	BS B500B
up to 7m	+40mm - 0mm		D10~D40	-6 %
over 7m	+50mm - 0mm		Upto 10mm		± 8%
			>10~20mm		± 6%
			>D20~D32		± 5%
			>D32		± 4%
			D8 & D10 >D10			±6.5%
						±4.5%
			Up to 8mm >D8				± 6.0%
							± 4.5%

Nominal Dimensions, Weight & Tolerance On Knots

Requirement for rib geometry Height of transverse ribs  0.03d to 0.15d Rib spacing, c                 0.4d to 1.2d Rib inclination, ß             35° to 75°

The projection of transverse ribs shall extend over at least 75% of circumference of the product which shall be calculated from the nominal diameters. Longitudinal rib: Where longitudinal rib are present, there height shall not exceed 0.10d, where d is the nominal diameter of the product.

Deformed bars produced at Qatar Steel conform to various national and international standards such as, BS 4449:1997 Grade 460B & BS 4449:2005 Grade B 500B (British), SSA 2/1992 (Saudi High Tensile), ASTM A 615 Grade 40/Grade 60 (American) and JIS G 3112 SD 295A (Japanese).

The registered trade mark 'QATAR STEEL' is rolled on every deformed rebars at an interval of about one meter, long with all identification marks.