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ASTM A178 Welded Steel Boiler Tubes

ASTM A178 Welded Steel Boiler Tubes

This specification covers standards for electric-resistance-welded tubes with minimum-wall-thickness made of carbon steel and carbon-manganese steel to be used in boiler tubes, boiler flues, superheater flues, and safe ends.

Description

This standard specification use for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes.


1.Chenmical composition


Element

Grade A 

Low-carbon steel

Grade C

Medium-carbon steel

Grade D

Carbon-Man-ganese steel

C0.06-0.18
0.35max0.27max
Mn0.27-0.630.80max1.00-1.50

P max

0.0350.0350.030
S max0.0350.0350.015
Si......0.10min

2.Mechanical property


Tensile strength min Mpa325
Yiled Strength min  Mpa
180
Elongation in 2 or 50mm min %35


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