Grade 662 S66220 - ASTM A453/453M-2017

Grade	Grade 662
USA UNS	S66220
Corresponding Standard	ASTM A453/453M-2017 High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels
Classification	Alloy Steel

Grade 662 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	B	Al
Minimum Value	-	0.4	0.4	-	-	12	24	-	2	1.8	0.001	-
Maximum Value	0.08	1	1	0.04	0.03	15	28	0.5	3.5	2.1	0.01	0.35

Grade 662 Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Class A	Solution Heat Treatment + Hardening	≥895	≥585	≥15	≥18	248~321
Class B	Solution Heat Treatment + Hardening	≥860	≥550	≥15	≥18	248~321

New and Old Grade Replacement List

Grade662 Corresponding Standards(Same grade name, different standards)

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