Type 431 Stainless
(UNS S43100)
Single Figures are Maximums
0.20 C, 1.00 Mn, 0.04 P, 0.03 S, 1.00 Si, 15.00/17.00 Cr, 1.25/2.50 Ni, Bal. Fe
Provides improved corrosion resistance and toughness (impact strength) in a quench-hardenable stainless steel. Has been used for fasteners and fittings, structural components exposed to marine atmosphere, and for highly stressed aircraft components.
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