Grade F837 Group 1-CW 384
USA UNS S38400
Corresponding Standard ASTM F837-2013(R2018)
Stainless Steel Socket Head Cap Screws
Classification Austenitic Stainless Steel
F837 Group 1-CW 384 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value - - - - - 15 17
Maximum Value 0.08 1 2 0.045 0.03 17 19
F837 Group 1-CW 384 Mechanical Properties
Tensile Strength
σb
ksi
Yield Point
σs
ksi
Elongation or Extension Rate
δ
%
Impact Energy Absorption
KV2
J
0.060~0.750 (Full size) ≥80 HRA
≥50
0.060~0.750 (Machined) ≥80 ≥40 ≥25 ≥50
• Core hardness is only required when full-size product tensile testing cannot be accomplished.
• D denotes nominal thread size
Approximate Comparison Table Austenitic Stainless Steel
China Japan United States International Organization for Standardization European Standard
GB ISC JIS UNS ISO Numerical Grade Numerical Grade
06Ni18Cr16 S38408 SUS384 S38400 X3NiCr18-16 4389-384-00-I (1.4389)

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