ASTM A210 Standard Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes.

This specification covers seamless medium-carbon steel boiler and superheater tubes. The specification also covers minimum-wall-thickness, tubing sizes, boiler flues including safe ends, arch and stay tubes. The specification provides tensile and hardness properties but only applicable to certain size limitations. Material manufacturing shall be killed. Tubes shall be made by seamless process, marked as either hot-finished or cold-finished. Surface condition shall be specifically stated in the order. 

Mechanical Properties::

Grade
Tensile Strength(Mpa)
Yield Strength(Mpa)
Elongation (%)
A1
≥ 415
≥ 255
≥ 30

≥ 485
≥ 275
≥ 30

Chemical composition:

Grade
C(Max)
Mn
Si(Min)
P(Max)
S(Max)
A1
0.27
Max.0.93
0.10
0.035
0.035
C
0.35
0.29~1.06
0.10
0.035
0.035