Grade F837 Group 1-CW1 305
USA UNS S30500
Corresponding Standard ASTM F837-2013(R2018)
Stainless steel socket head cap screws
Classification Austenitic Stainless Steel
F837 Group 1-CW1 305 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu
Minimum Value - - - - - 17 10.5 -
Maximum Value 0.12 1 2 0.045 0.03 19 13 1
F837 Group 1-CW1 305 Mechanical Properties
Tensile Strength
σb
ksi
Yield Point
σs
ksi
Elongation or Extension Rate
δ
%
Hardness
HBW
0.060~0.750 (Full size) ≥102 HRA
≥59
0.060~0.750 (Machined) ≥87 ≥65 ≥20 ≥59
• Core hardness is only required when full-size product tensile testing cannot be accomplished.
• D denotes nominal thread size
1 Approximate Comparison Table
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
10Cr18Ni12 S30510 305 SUS 305 STS 305 305 S30500 X6CrNi 18-12 X5CrNi 18-12
(X5CrNi 19-11)
X4CrNi 18-12
1.4303
1.4303
Z8CN 18-12 X4CrNi 18-12 1.4303 12Х18Н12Т 305S19
2 Approximate Comparison Table
China Japan United States International Organization for Standardization European Standard
ISC JIS UNS ISO Numerical Grade Numerical Grade
S38148 SUSXM15J1 S30500 X6CrNiSi18-13-4 4884-305-00-X (1.4884)
3 Approximate Comparison Table Stainless steels for cold heading and cold extruding
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM/AISI UNS ISO Numerical Grade EN Numerical Grade
10Cr18Ni12
(1Cr18Ni12)
S30510 SUS305 305 S30500 X6CrNi18-12 4303-305-00-I X6CrNi18-12 1.4303

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