ASTM A516 GR55

ASTM A516 – Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service

Grade: 55


Chemical Requirements

Carbon,max A,B:
    1⁄2 in. [12.5 mm] and under0.18
    Over 1⁄2 in. to 2 in. [12.5 to 50 mm], incl0.20
    Over 2 in. to 4 in. [50 to 100 mm], incl0.22
    Over 4 to 8 in. [100 to 200 mm], incl0.24
    Over 8 in. [200 mm]0.26
    1⁄2 in. [12.5 mm] and under:
        Heat analysis0.60-0.90
        Product analysis0.55-0.98
    Over 1⁄2 in. [12.5 mm]:
        Heat analysis0.60-1.20
        Product analysis0.55-1.30
Sulfur, maxA0.025
        Heat analysis0.15-0.40
        Product analysis0.13-0.45

A Applies to both heat and product analyses.

B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 % by heat analysis and 1.60 % by product analysis.


Tensile Requirements

Tensile strength, ksi [MPa]55–75 [380–515]
Yield strength, min,A ksi [MPa]30 [205]
Elongation in 8 in. [200 mm], min, %B23
Elongation in 2 in. [50 mm], min, %B27

A Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.

B See Specification A20/A20M for elongation adjustment.