tandard:

ASTMA213 — American Society for Testing and Materials Standards

ASMESA213 — American Society of Mechanical Engineers standards

Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater, and Heat-Exchanger Tubes

Purpose:

Boilerand Superheater for minimum wall thickness seamless ferritic and austeniticsteel and austenitic steel heat exchanger.

The main production steel grades:

T11,T12, T22, etc. are negotiated, but also supply other grades of steel.

Mechanical properties:

Standard	Grade	Tensile strength (MPa)	Yield strength (MPa)	Elongation (%)
ASTMA213 ASMESA213	T11	≥415	≥170	≥30
	T12	≥415	≥205	≥30
	T22	≥415	≥205	≥30

Chemical composition:

Standard	Grade	C	Si	Mn	P、S	Cr	Mo	V	Cu	Ni
ASTM A213 ASME SA213	T11	0.05～0.15	0.50～1.00	0.30～0.60	≤0.025	1.00～1.50	0.44～0.65	/	/	/
	T12	0.05～0.15	≤0.50	0.30～0.61	≤0.025	0.80～1.25	0.44～0.65	/	/	/
	T22	0.05～0.15	≤0.50	0.30～0.60	≤0.025	1.90～2.60	0.87～1.13	/	/	/

Surface Condition

Ferritic alloy cold-finished steel tubes shall be free of scale and suitable for inspection. A slight amount of oxidation is not considered scale.
Ferritic alloy hot-finished steel tubes shall be free of loose scale and suitable for inspection.
Stainless steel tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
Any special finish requirement shall be subject to agreement between the supplier and the purchaser.