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SA 516 (Hydrogen Induced Cracking – HIC)

Overview

This material is restricted to extra low sulfur, phosphorus, and other residual elements. HIC tests are performed on a per heat / thickness basis in association with NACE Standard TM0284. CLR (Crack Length Ratio), CTR (Crack Thickness Ratio), and CSR (Crack Sensitivity Ratio) yield excellent results in keeping with the quality of the steel product.

Chemical Requirements

*Elements represented in percentage

Elements Composition %
Grade 55
(Grade 380)
Composition %
Grade 60
(Grade 415)
Composition %
Grade 65
(Grade 450)
Composition %
Grade 70
(Grade 485)
Carbon, max
1/2 in. (12.5 mm) and under 0.18 0.21 0.24 0.27
Over 1/2 to 2 in. (12.5 to 50 mm), incl 0.20 0.23 0.26 0.28
 Over 2 to 4 in. (50 to 100 mm), incl 0.22 0.25 0.28 0.30
 Over 4 to 8 in. (100 to 200 mm), incl 0.24 0.27 0.29 0.31
 Over 8 in. (200 mm) 0.26 0.27 0.29 0.31
Manganese, max
1/2 (12.5) and under:
 Heat analysis 0.60-0.90 0.60-0.90 0.85-1.20 0.85-1.20
 Product analysis 0.55-0.98 0.55-0.98 0.79-1.30 0.79-1.30
Over 1/2 (12.5) and under:
 Heat analysis 0.60-1.20 0.85-1.20 0.85-1.20 0.85-1.20
 Product analysis 0.55-1.30 0.79-1.30 0.79-1.30 0.79-1.30
Phosphorus, max  0.010 0.010 0.010 0.010
Sulfur, max  0.002 0.002 0.002 0.002
Silicon
 Heat analysis 0.15-0.40 0.15-0.40 0.15-0.40 0.15-0.40
 Product analysis 0.13-0.45 0.13-0.45 0.13-0.45 0.13-0.45

Grade 55
(Grade 380)
Grade 60
(Grade 415)
Grade 65
(Grade 450)
Grade 70
(Grade 485)
Tensile strength, ksi (MPa) 55-75(380-515) 60-80(415-550) 65-85(450-585) 70-90(485-620)
Yield strength, min. ksi (MPa) 30(205) 32(220) 35(240) 38(260)
Elongation in 8 in. (200 mm), min, % 23 21 19 17
Elongation in 2 in. (50 mm), min, % 27 25 23 21
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