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A-656 Grade 60, 70, 80

Overview

An 80,000 minimum yield grade used in construction areas where added strength is a concern. This low carbon / high manganese grade achieves it’s physical characteristics through the controlled rolled process along with small additions of Vanadium and Columbium. The low carbon provides good welding characteristics and enhanced forming capabilities.

Chemical Requirements

*Elements represented in percentage
– A “-” indicates that element is not defined for that Type.

Element Composition
Type 3 Type 7 Type 8
Carbon, maxA 0.18 0.18 0.18
Manganese, maxA 1.65 1.65 1.65
Phosphorus, max 0.025 0.025 0.025
Sulfur, max 0.030 0.030 0.030
Silicon, max 0.60 0.60 0.60
Vanadium, max 0.08 0.15B 0.15C
Nitrogen, max 0.030 0.030 0.030
Columbium 0.008-0.10 0.10 maxB 0.10 maxC
Titanium, max 0.15C

Tensile Requirements

Grades 60
[415]
70
[485]
80
[550]
Yield point, min, ksi [MPa] 60 [415] 70 [485] 80 [550]
Tensile strength, ksi [MPa] 70 [485] 80 [550] 90 [620]
Elongation in 8 in. [200 mm], min, % 17B 14B 12B
Elongation in 2 in. [50 mm], min, % 20B 17B 15B

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