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ASTM A135 Gr.B ERW Pipe

November 27, 2023

Latest company news about ASTM A135 Gr.B ERW Pipe

Chemical Composition Of ASTM A135

Element Composition, max, %
Grade A Grade B
C 0.25 0.30
Mn 0.95 1.20
P 0.035 0.035
S 0.035 0.035

*The steel from which the ASTM A135 ERW pipe is made shall conform to the chemical requirements prescribed in this table, based on heat analysis.

Mechanical Property Of ASTM A135

ASTM A135 Grade A Grade B
Tensile Strength,
min, ksi [MPa]
Yield Strength,
min, ksi [MPa]
min, %
35 30

For ASTM A135 Grade B ERW steel pipes, the welds require heat treatment after welding. The minimum processing temperature is 1000°F (approximately 540°C), which ensures that the performance of the steel pipe meets the standard requirements. At the same time, one of the purposes of heat treatment is to prevent untempered martensite from remaining in the weld. Martensite is a hard phase in steel materials. Its presence will significantly increase the hardness of the material, but at the same time it will also reduce the plasticity and toughness of the material. Therefore, heat treatment is performed after welding to temper the martensite at the weld and become more stable, thus improving the overall performance of the steel pipe.

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