Grade 633
USA UNS S35000
Corresponding Standard ASTM A693-2013
Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
Classification Precipitation-Hardening Stainless Steel
633 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo N
Minimum Value 0.07 - 0.5 - - 16 4 2.5 0.07
Maximum Value 0.11 0.5 1.25 0.04 0.03 17 5 3.2 0.13
633 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Hardness
HBW
0.03<t<0.038 Solid Solution Treatment ≤1380 ≤620 ≥8 HRC
≤30
0.03<t<0.05 Solid Solution Treatment ≤1380 ≤605 ≥8 HRC
≤30
0.05<t<0.13 Solid Solution Treatment ≤1380 ≤595 ≥8 HRC
≤30
0.13<t<0.25 Solid Solution Treatment ≤1380 ≤585 ≥8 HRC
≤30
t>0.254 Solid Solution Treatment ≤1380 ≤585 ≥12 HRC
≤30
0.022<t<0.038 Precipitation Hardening, 455°C ≥1275 ≥1035 ≥2 HRC
≥42
0.038<t<0.041 Precipitation Hardening, 455°C ≥1275 ≥1035 ≥4 HRC
≥42
0.041<t<0.254 Precipitation Hardening, 455°C ≥1275 ≥1035 ≥6 HRC
≥42
0.254<t<4.762 Precipitation Hardening, 455°C ≥1275 ≥1035 ≥8 HRC
≥42
0.022<t<0.038 Precipitation Hardening, 540℃ ≥1140 ≥1000 ≥2 HRC
≥36
0.038<t<0.041 Precipitation Hardening, 540℃ ≥1140 ≥1000 ≥4 HRC
≥36
0.041<t<0.254 Precipitation Hardening, 540℃ ≥1140 ≥1000 ≥6 HRC
≥36
0.254<t<4.762 Precipitation Hardening, 540℃ ≥1140 ≥1000 ≥8 HRC
≥36
Approximate Comparison Table Precipitation Hardening Stainless Steel
China United States International Organization for Standardization European Standard
GB ISC ASTM UNS ISO Numerical Grade Numerical Grade
09Cr17Ni5Mo3N
GB/T 20878-2024
S51750 633
ASTM A959
S35000 X9CrNiMoN17-5-3 4457-350-00-X (1.4457)
633 Corresponding Standards(Same grade name, different standards)

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