SA453 Grade 665 Class A - ASME SA-453/SA-453M - H2ABC

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Grade	SA453 Grade 665 Class A
Corresponding Standard	ASME SA-453/SA-453M Specification for bolting materials, High- Temperature, 50 to120 ksi [345 to 827 MPa] yield strength with expansion coefficients comparable to Austenitic Steel
Classification	Precipitation-Hardening Stainless Steel

SA453 Grade 665 Class A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	B	Al
Minimum Value	-	0.1	1.25	-	-	12	24	-	1.25	2.7	0.01	-
Maximum Value	0.08	0.8	2	0.04	0.03	15	28	0.25	2.25	3.3	0.07	0.25

SA453 Grade 665 Class A Mechanical Properties

diameter d mm	Test Temperature	Mark	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
All specifications	Room Temperature	Gr 665 Class A	≥1170	≥830	≥12	≥15	HBW: 311~388； HRB: ≥32； HRC: ≤41
All specifications			≥100h, Endurance strength: ≥515			≥3

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