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Grade 632
USA UNS S15700
Corresponding Standard ASTM A693-2024
Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
Classification Precipitation-Hardening Stainless Steel
632 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo Al
Minimum Value - - - - - 14 6.5 2 0.75
Maximum Value 0.09 1 1 0.04 0.03 16 7.7 3 1.5
632 Mechanical Properties
Thickness
t
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
0.038~102 Solid Solution Treatment ≤1035 ≤450 ≥25 / HRB
≤100
0.038~0.124 Precipitation Hardening, 760℃+plus 15℃+566℃ ≥1310 ≥1170 ≥2 / HRC
≥40
0.127~0.251 Precipitation Hardening, 760℃+plus 15℃+566℃ ≥1310 ≥1170 ≥3 / HRC
≥40
0.25~0.505 Precipitation Hardening, 760℃+plus 15℃+566℃ ≥1310 ≥1170 ≥4 / HRC
≥40
0.51~4.76 Precipitation Hardening, 760℃+plus 15℃+566℃ ≥1310 ≥1170 ≥5 / HRC
≥40
4.762~15.88 Precipitation Hardening, 760℃+plus 15℃+566℃ ≥1310 ≥1170 ≥4 ≥20 HRC
≥40
0.038~0.124 Precipitation Hardening, 954℃+minus 73℃+510℃ ≥1550 ≥1380 ≥1 / HRC
≥46
0.127~0.251 Precipitation Hardening, 954℃+minus 73℃+510℃ ≥1550 ≥1380 ≥2 / HRC
≥46
0.25~0.505 Precipitation Hardening, 954℃+minus 73℃+510℃ ≥1550 ≥1380 ≥3 / HRC
≥46
0.51~4.76 Precipitation Hardening, 954℃+minus 73℃+510℃ ≥1550 ≥1380 ≥4 / HRC
≥46
4.762~15.88 Precipitation Hardening, 954℃+minus 73℃+510℃ ≥1550 ≥1380 ≥4 ≥20 HRC
≥46
0.038~0.13 Cold rolled at mill ≥1380 ≥1205 ≥1 / HRC
≥41
0.038~0.13 Cold rolled at mill +482℃ ≥1655 ≥1585 ≥1 / HRC
≥46
Note：Reduction of Area：Applicable to tests in the long transverse direction. Transverse to the direction of rolling and parallel to the product surface.
Note：Impact test is not required unless specified on the purchase order.
Approximate Comparison Table Precipitation Hardening Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade
07Cr15Ni7Mo2Al
(0Cr15Ni7Mo2Al) 		S51570 632 SUS 632 STS 632 632 S15700 X8CrNiMoAl 15-7-2 X8CrNiMoAl 15-7-2 1.4532 Z8CNDA 17-07 X8CrNiMoAl 15-7-2 1.4532
632 Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
632 S15700
2 ASTM A564/A564M-2019(a)
632 S15700
3 ASTM A693-2013
632 S15700
4 ASTM A959-2019
632 S15700
5 ASTM A705/A705M-2023
632 S15700
6 ASTM A693-2024
632 S15700

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