This specification covers seamless carbon steel pipe for high-temperature service (Note 1) in NPS 1/8 to NPS 48 [DN 6 to DN 1200] (Note 2) inclusive, with nominal (average) wall thickness as given in ASME B36.10. It shall be permissible to furnish pipe having other dimensions provided such pipe complies with all other requirements of this specification.
Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations, and for welding. When the steel is to be welded, it is presupposed that a welding procedure suitable to the grade of steel and intended use or service will be utilized.
Note 1: It is suggested, consideration be given to possible graphitization.
Killed steel, with primary melting process being open-hearth, basic-oxygen, or electric-furnace, possible combined with separate degassing or refining.Steel cast in ingots or strand cast is permissible.Hot-finished pipe need not be heat treated.Cold-drawn pipe shall be heat treated after the final cold draw pass.
Chemical Requirements ASTM A106
|Grade A||Grade B||Grade C|
|Carbon,max||0.25 (1)||0.30 (2)||0.35 (2)|
(1) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above
the specified maximum will be permitted up to a maximum of 1.35%.
(2)Unless otherwise specified by the purchaser, for each reduction of 0.01% below the specified carbon maximum,
an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65%.
(3) These five elements combined shall not exceed 1%.