USA UNS S41428
Corresponding Standard ASTM A959-2019
Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Classification Martensitic Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo N Ti W V Al Sn
Minimum Value 0.1 0.1 0.65 - - 11.3 2.3 - 1.5 0.02 - - 0.25 - -
Maximum Value 0.17 0.35 1.05 0.02 0.015 12.7 3.2 0.15 2 0.045 0.05 0.1 0.4 0.025 0.05
• Unless otherwise indicated, a grade designation originally assigned by the American Iron and Steel Institute (AISI).

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