635 S17600 - ASTM A693-2013

Grade	635
USA UNS	S17600
Corresponding Standard	ASTM A693-2013 Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
Classification	Precipitation-Hardening Stainless Steel

635 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Ti	Al
Minimum Value	-	-	-	-	-	16	6	0.4	-
Maximum Value	0.08	1	1	0.04	0.03	17.5	7.5	1.2	0.4

635 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
t≤0.76	Solid Solution Treatment	≤825	≤515	≥3		HRC ≤32
0.76＜t≤1.52	Solid Solution Treatment	≤825	≤515	≥4		HRC ≤32
t＞1.52	Solid Solution Treatment	≤825	≤515	≥5		HRC ≤32
t≤0.76	Precipitation Hardening, 510℃	≥1310	≥1170	≥3		HRC ≥39
0.76＜t≤1.52	Precipitation Hardening, 510℃	≥1310	≥1170	≥4		HRC ≥39
t＞1.52	Precipitation Hardening, 510℃	≥1310	≥1170	≥5		HRC ≥39
Plate	Precipitation Hardening, 510℃	≥1310	≥1170	≥8	≥25	HRC ≥39
t≤0.76	Precipitation Hardening, 540℃	≥1240	≥1105	≥3		HRC ≥37
0.76＜t≤1.52	Precipitation Hardening, 540℃	≥1240	≥1105	≥4		HRC ≥37
t＞1.52	Precipitation Hardening, 540℃	≥1240	≥1105	≥5		HRC ≥37
Plate	Precipitation Hardening, 540℃	≥1240	≥1105	≥8	≥30	HRC ≥38
t≤0.76	Precipitation Hardening, 565°C	≥1170	≥1035	≥3		HRC ≥35
0.76＜t≤1.52	Precipitation Hardening, 565°C	≥1170	≥1035	≥4		HRC ≥35
t＞1.52	Precipitation Hardening, 565°C	≥1170	≥1035	≥5		HRC ≥35
Plate	Precipitation Hardening, 565°C	≥1170	≥1035	≥8	≥30	HRC ≥36

Approximate Comparison Table Precipitation Hardening Heat-Resistant Steel

635 Corresponding Standards(Same grade name, different standards)

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