ASME ASTM Standard Boiler Tube Standard ASTM A213 Application It is used for boiler and superheater min wall thickness seamless ferrite and austenitic steel tube and heat exchanger austenitic steel tube. Main Steel Tube Grades A213 T11, A213T12, A213 T22 etc. Other grades can also be provided after consulting with customers. Chemical Composition

Standard	Grade	Chemical Composition %
		C	Si	Mn	P, S	Cr	Mo
ASTM A213	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
	T91	0.08-0.12	0.20-0.50	0.30-0.60	≤0.020	8.00-9.50	0.85-1.05

Mechanical Properties

Standard	Grade	Mechanical Properties
		Tensile Strength MPa	Yield Strength MPa	Elongation %
ASTM A213	T11	≥415	≥170	≥30
	T12	≥415	≥205	≥30
	T22	≥415	≥205	≥30
	T91	≥585	≥415	≥20