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A 131 ABS Grade A


Used primarily in structural applications in marine / shipping industry for barges, ships, small vessels, support structures and various type of equipment.

Chemical Requirements

*Elements represented in percentage

Element Chemical Composition (heat analysis), % max unless otherwise specified
Grades A
Deoxidation and Thickness (t), in. [mm]
Killed or Semi-Killed t 2.0 in. [50 mm], Killed t 2.0 in. [50 mm]
C 0.21C
Mn, min 2.5 x C
Si 0.50D
P 0.035
S 0.035
Ni E
Cr E
Mo E
Cu E
C + Mn/6 0.40

Tensile Requirements

Grade Tensile Strength,
ksi [MP]
Yeild Point, min
ksi [MP]
Elongation in 8 in. [200 mm]A,B, min % Elongation in 2 in. [50 mm]B,C, min %
A, B, D, E 58 TO 75 [400 to 520] 34 [235] 21 24