ASTM A135 Grade B Electric-Resistance-Welded Steel Pipe/tube

ASTM A135 Standard Specification for Electric-Resistance-Welded Steel Pipe.

ASTM A135 Grade B steel pipe/tube is intended for conveying gas, vapor, water or other liquid; only Grade A is adapted for flanging and bending.

A135 grade B steel pipe chemical composition
 

The minimum elongation shall be determined by the following equation, with the calculated value rounded to the nearest percent:
E548t114
where:
E = elongation in 2 in. (50 mm), minimum, %, and
t = specified wall thickness, in