Brand Name :
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Type/Size/Grade/Variety :
Name of the product Bright Steel Bars
Steel Designation/Grade and its properties As per Annexure-A enclosed
Finished Condition Drawn
Shape Round bar
Dimensions and tolerance
classes • Dimensions: Round bar of diameter from 6.00 mm to upto and including 40.00 mm
• Tolerance classes: h9, h10, h11 h12
Annex-A to the Scope of Licence as per IS 9550:2001
Sr. No. Steel
Designation/
Grade Chemical
Composition Heat Treatment
Carried out (if any) Mechanical
Properties (if any)
1 SUP9D %.C: 0.56-0.62
% Si: 0.15-0.35
% Mn: 0.70 - 1.00
% Cr: 0.75-1.00
% S: 0.035 Max
% P: 0.035 Max +AC Tensile Strength - 125 kgf/mm2 Min.
Yield Strength - 110 kgf/mm2 Min.
% Elongation – Min. 9
% Reduction of Area – Min. 20
Hardness - 39-43 HRC
2 POSMA45R % C: 0.43-0.47
% Si: 0.20-0.40
% Mn: 1.10 - 1.50
% Ni: 0.05 - 0.20
% Cr: 0.05 - 0.15
% S: 0.030 - 0.060
% P: 0.030 Max
% Al: 0.01 - 0.07
% V: 0.09 - 0.11
% Ti: 0.01 - 0.03 - Hardness - HRC 24-30
3 S20C % C: 0.18 - 0.23
% Si: 0.15 - 0.35
% Mn: 0.30 - 0.60
% Ni: 0.20 Max
% Cr: 0.20 Max
% Cu: 0.30 Max
% S: 0.035 Max
% P: 0.030 Max - -
4 51CRV4 % C: 0.47 - 0.55
% Si: 0.40 Max
% Mn: 0.70 - 1.10
% Cr: 0.90 - 1.20
% V: 0.10 - 0.25
% S: 0.025 Max
% P: 0.025 Max - -
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