SPECIFICATIONS OF STEEL · PDF file · 2016-06-01SPECIFICATIONS OF STEEL BILLETS:...
Transcript of SPECIFICATIONS OF STEEL · PDF file · 2016-06-01SPECIFICATIONS OF STEEL BILLETS:...
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SPECIFICATIONS OF STEEL BILLETS:CHEMICAL COMPOSITION:Capable of producing billets with chemical compositions suitable for producing steel reinforcing bars with specifications like ASTM A615M, ASTM A706M and BS 4449. Other chemical compositions are also possible so please contact our Commercial Department, for further assistance and information.
SIZE:Cross Section 130 mm x 130 m
150 mm x 150 m
Cutting Lenghts 12 meters
(Please contact our Commercial
Department for other cutting lenghts
with min 6 m and max 12 m)
SIZE AND SHAPE TOLERANCES:Side Dimensions ± 2 % Measured on Cold Billet at least 150 mm from cut end.
Face Bulging/ Depression ≤ 2.0 % Expressed as percent in side length
Rhomboidity ≤ 2.5 % R% = * 100
Camber (Bend) ≤ 5 mm / m to 50 mm max Measured on Cold Billet at least 150 mm from cut end.
Angular Twist ≤ 0.8º / m to 8º max Measured on Cold Billet at least 150 mm from cut end.
Cutting Length 0 / +70 mm
/D1 - D2/0.5 * (D1 + D2)
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SURFACE AND INTERNAL QUALITY:The billets should be free from longitudinal cracks, transverse cracks, joint billet, scum, scab, shrinkage cavity and other surface and internal unsoundness that may adversely affect final product quality.
IDENTIFICATION:Heat Number Heat number to be stamped/hand written at the billet end.
Color Coding Color Coding signifying grade or class to be painted at the billet end (as per customer’s requirement.)
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The Company’s Quality Assurance System ensures that all products are in conformance to the customers specified quality size requirement as prescribed below, and as mentioned in every Mill Certificate issued on every delivered product.
d = rebar nominal diameter, mm
Minimum YieldStrength, N/mm2
Minimum TensileStrength, N/mm2 Gauge
LengthRebar Size,
mm
Elongation
Minimum %Elongation
Equivalent to ASTM A615M Grade 40*
Equivalent to ASTM A615M Grade 60*
Equivalent to ASTM A615M Grade 75*
Grade
MECHANICAL PROPERTIES
280
420
520
420
620
690
8 ~ 12
14 ~ 20
8 ~ 20
22 ~ 28
32 ~ 40
8 ~ 28
32 ~ 40
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12
9
8
7
7
6
200mm
BendAngle
Rebar Size,mm
Bend Test
Minimum %Elongation
8 ~ 18
20
8 ~ 18
20 ~ 28
32 ~ 40
8 ~ 28
32 ~ 40
3.5 x d
5 x d
3.5 x d
5 x d
7 x d
5 x d
7 x d
180º
GRADE AND SIZEGrade Rebar Nominal Diameter, mm
Equivalent to ASTM A615M Grade 40
Equivalent to ASTM A615M Grade 60
Equivalent to ASTM A615M Grade 75
8
8
8
10
10
10
12
12
12
14
14
14
16
16
16
18
18
18
20
20
20
-
22
22
-
25
25
-
28
28
-
32
32
-
36
36
-
40
40
Rebar sizes, standards and grades that are not mentioned above are also possible to produce, so please contact our CommercialDepartment for further assistance and information.
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GradeChemical Composition, %
Equivalent to ASTM A615M Grade 40*
Equivalent to ASTM A615M Grade 60*
Equivalent to ASTM A615M Grade 75*
C
-
-
-
Mn
-
-
-
Si
-
-
-
P
0.06 max
0.06 max
0.06 max
S
-
-
-
N
-
-
-
Ceq
-
-
-
Nominal Unit Mass, kg/m
Grade
Nominal Diameter
Minimum Weight Variation, % -6.0
8
0.395
10
0.617
12
0.888
14
1.208
16
1.578
18
1.998
20
2.466
22
2.984
All Grades
Commercial Length, m
12
Lenght Tolerance
0 / + 100mm
Special Lengths, m
For discussion with the customers(min of 6 m and max of 12 m)
25
3.853
28
4.834
32
6.313
36
7.990
40
9.865
CHEMICAL PROPERTIES
NOMINAL UNIT MASS
COMMERCIAL LENGTHS
KWTSTEEL is also capable of producing round bars, flat bars and light sections in accordance to international quality standards that the customer may specify.