Grade F837 Group 1-AF XM1
USA UNS S20300
Corresponding Standard ASTM F837-2013(R2018)
Stainless Steel Socket Head Cap Screws
Classification Austenitic Stainless Steel
F837 Group 1-AF XM1 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo
Minimum Value - - 5 - 0.18 16 5 1.75 -
Maximum Value 0.08 1 6.5 0.04 0.35 18 6.5 2.25 0.5
F837 Group 1-AF XM1 Mechanical Properties
Tensile Strength
σb
ksi
Yield Point
σs
ksi
Elongation or Extension Rate
δ
%
Impact Energy Absorption
KV2
J
0.060~1.500 (Full size) ≤85 HRB
≤95
0.060~1.500 (Machined) ≤85 ≤55 ≥40 ≤95
• Core hardness is only required when full-size product tensile testing cannot be accomplished.
• D denotes nominal thread size

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