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Grade SUH31
Corresponding Standard JIS G 4311-2019
Heat-resisting steel bars and wire rods
Classification Ferritic Stainless Steel
Properties Corrosion Resistance
SUH31 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni W
Minimum Value 0.35 1.5 - - - 14 13 2
Maximum Value 0.45 2.5 0.6 0.04 0.03 16 15 3
SUH31 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
% 		Hardness
HBW
Bars; d≤25 Solution (S) ≥740 ≥315 ≥30 ≥40 ≤248
Bar; 25<d≤180 Solution (S) ≥690 ≥315 ≥25 ≥35 ≥248
1 Approximate Comparison Table Valve Steel
China Taiwan, China Japan South Korea Germany France Russia United Kingdom
GB ISC CNS JIS KS DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
45Cr14Ni14W2Mo
(4Cr14Ni14W2Mo) 		S32540 31 SUH 31 STR 31 ~ X50NiCrWV 13-13 ~ 1.2731 ~ Z35CNWS 14-14 45Х14Н14В2М 331S42
2 Approximate Comparison Table Austenitic Stainless Steel
Japan International Organization for Standardization European Standard
JIS ISO Numerical Grade Numerical Grade
SUH31 X40CrNiWSi15-14-3-2 4867-316-77-J (1.4867)

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