SA453 Grade 660 Class A S66286 - ASME SA-453/SA-453M

Grade	SA453 Grade 660 Class A
	S66286
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 660 Class A Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	Ti	V	B	Al
Minimum Value	-	-	-	-	-	13.5	24	1	1.9	0.1	0.001	-
Maximum Value	0.08	1	2	0.04	0.03	16	27	1.5	2.35	0.5	0.01	0.35

SA453 Grade 660 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	Room Temperature	Gr 660 Class A	≥895	≥585	≥15	≥18	HBW: 248~341； HRB: ≥99①； HRC: ≤37
All	650°C		≥100h, Endurance Strength: ≥385		≥5

1 Approximate Comparison Table Heat-Resistant Stainless Steel

2 Approximate Comparison Table Deformed High-Temperature Alloy

3 Approximate Comparison Table Stainless Steels for Cold Heading and Cold Extruding

China		Japan	United States		International Organization for Standardization		European Standard
GB	ISC	JIS	ASTM/AISI	UNS	ISO	Numerical Grade	EN	Numerical Grade
06Cr15Ni25Ti2MoAlVB (0Cr15Ni25Ti2MoAlVB)	S51525	SUH660	660	S66286	X6NiCrTiMoVB25-15-2	4980-662-86-X	X6NiCrTiMoVB25-15-2	1.4980

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!