SA453 Grade 651 Class A - ASME SA-453/SA-453M - H2ABC

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Grade	SA453 Grade 651 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 651 Class A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	W	Nb ^*
Minimum Value	0.28	0.3	0.75	-	-	18	8	-	1	0.1	1	0.25
Maximum Value	0.35	0.8	1.5	0.04	0.03	21	11	0.5	1.75	0.35	1.75	0.6

SA453 Grade 651 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
d≤76	Room Temperature	Gr 651 Class A	≥690	≥485	≥18	≥35	HBW: 217~277； HRB: ≥95； HRC: ≤29
d＞76	Room Temperature			≥415
All specifications			≥100h, Endurance strength: ≥275		≥5

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