USA UNS S44330
Corresponding Standard ASTM A959-2019
Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
Classification Ferritic Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Cu N More
Minimum Value - - - - - 20 0.3 - (Ti+Nb) 8×(C+N) min; 0.80 max
Maximum Value 0.025 1 1 0.04 0.03 23 0.8 0.025
• Unless otherwise indicated, a grade designation originally assigned by the American Iron and Steel Institute (AISI).
Approximate Comparison Table Ferritic Stainless Steel
United States International Organization for Standardization European Standard
UNS ISO Numerical Grade
S44330 X2CrCuNbTiV22-1 1.4622

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