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Grade 320S17
Old Grade
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
320S17 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu ◎ Mo Nb ◎ More
Minimum Value - 0.2 0.5 - - 16.5 11 - 2.25 - Ti: 4C~0.6
Maximum Value 0.08 1 2 0.045 0.03 18.5 14 0.7 3 0.2
320S17 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 ≥50 kgf/mm2
（≥490 MPa）		 ≥20 kgf/mm2
（≥196 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 Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr17Ni12Mo2Ti S31668 316Ti SUS 316Ti STS 316Ti 316Ti S31635 X6CrNiMoTi 17-12-2 4571-316-35-I X6CrNiMoTi 17-12-2
(X10CrNiMoTi 18-10) 		1.4571 Z6CNDT 17-12 X6CrNiMoTi 17-12-2 1.4571 08Х17Н13М2Т 2350 320S31
320S17
2 Approximate Comparison Table Austenitic Stainless Steel
China Germany France Russia United Kingdom
GB DIN EN/DIN NF EN/NF GOST BS EN/BS
1Cr18Ni12Mo2Ti X10CrNiMoTi1810 Z8CNDT17.12 10X17H13M2T 320S17
3 Approximate Comparison Table Austenitic Stainless Steel
China Germany France Russia United Kingdom
GB DIN EN/DIN NF EN/NF GOST BS EN/BS
0Cr18Ni12Mo2Ti X10CrNiMoTi1810 Z6CNDT17.12 08X17H13M2T 320S17

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