Standard:

ASTM A210 —American Society for Testing and Materials Standards

ASME SA210 — AmericanSociety of Mechanical Engineers standards

Purpose:

For boiler pipesand boiler flue pipe, including security side, the dome and the support tubeand superheater tubes minimum wall thickness of seamless carbon steel pipes.

The mainproduction steel grades:

A-1, C, etc. arenegotiated, but also supply other grades of steel.

Mechanicalproperties:  

Standard	Grade	Tensile strength (MPa)	Yield strength (MPa)	Elongation (%)
ASTMA210 ASME SA210	A-1	≥415	≥255	≥30
	C	≥485	≥275	≥30

Chemical composition:

Standard	Grade	Chemical Composition
		C	Si	Mn	P	S	Cr	Mo	Cu	Ni	V
ASTM A210 ASME SA210	C	≤0.35	≥0.10	0.29～1.06	≤0.035	≤0.035	/	/	/	/	/
	A-1	≤0.27	≥0.10	≤0.93	≤ 0.035	≤0.035	/	/	/	/	/

Hot-finished tubes need not be heat treated. Cold-finished tubes shall be given a subcritical anneal, a full anneal, or a normalizing heat treatment after the final cold-finishing process.

The tubes shall have a hardness not exceeding the following: 79 HRB or 143 HRB for Grade A-1,89 HRB or 179 HRB for Grade C.

Hydrostatic or Nondestructive Electric Test —Each tube shall be subjected to the hydrostatic, or,

instead of this test, a nondestructive electric test may be used when specified by the purchaser

In addition to the marking prescribed in Specifi-cation A 450/A 450M, the marking shall indicate

whether the tube is hot-finished or cold-finished.