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Grade 317S12
Corresponding Standard BS 970-4-1970
Specification for Wrought steels in the form of blooms,billets,bars and forgings--Part 4:Valve steels
Classification Austenitic Stainless Steel
317S12 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu ◎ Mo Ti ◎ Nb ◎
Minimum Value - 0.2 0.5 - - 17.5 14 - 3 - -
Maximum Value 0.03 1 2 0.045 0.03 19.5 17 0.7 4 0.1 0.2
317S12 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Specified Plastic Yield Strength
Rp0.2
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Steel Softening treatment ≥47 kgf/mm2
（≥461 MPa）		 ≥17 kgf/mm2
（≥167 MPa）		 ≥40 ≤183
• The letters P, R, S and T in the table indicate the range of tensile strength of quenched and tempered steels.
• If bars are straightened by reeling or cold rectification the surface becomes work-hardened and the specified maximum Brinell hardness to be obtained on such bars shall be agreed between the manufacturer and the purchaser.
1 Approximate Comparison Table Austenitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
022Cr19Ni13Mo3
(00Cr19Ni13Mo3) 		S31703 317L SUS 317L STS 317L 317L S31703 X2CrNiMo 19-14-4
X2CrNiMo18-15-4 		X2CrNiMo 18-15-4
(X2CrNiMo 18-16) 		1.4438 Z2CND 19-15
Z3CND 19-15-04 		X2CrNiMo 18-15-4 1.4438 03Х16Н15М3 2367 317S12
317S11
2 Approximate Comparison Table
China Japan United States International Organization for Standardization Germany France Russia United Kingdom
GB JIS ASTM/AISI ISO DIN EN/DIN NF EN/NF GOST BS EN/BS
00Cr19Ni13Mo3 SUS317J1 317L 74 X2CrNiMo1816 Z2CND19.15 03X16H15M3 317S12
317S12 Corresponding Standards(Same grade name, different standards)
1 BS
317S12
2 BS 970-4-1970
317S12

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