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Type 420F Stainless(UNS S42020)

Single Figures are Maximums

0.15 C min., 1.25 Mn, 0.06 P, 0.15 S min., 1.00 Si, 12.00/14.00Cr, 0.60 Mo, Bal. Fe

Type 420F, a free-machining version of Type 420, is a hardenable 12% chrome steel with higher strength, hardness, and wear resistance than Type 410.

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Q: What is F in 420F stainless steel designation stand for?
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