AISI-SAE Standard Carbon Steels Composition Free-Machining Grades — Resulfurized and Rephosphorized

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AISI-SAE Number
UNS Number
Composition
C Mn P(max)** S(max)**
Nonresulfurized Grades — Over 1 per cent Mn
Free-Machining Grades — Resulfurized and Rephosphorized
1211 G12110 0.13 max 0.60–0.90 0.07–0.12 0.10–0.15
1212 G12120 0.13 max 0.70–1.00 0.07–0.12 0.16–0.23
1213 G12130 0.13 max 0.70–1.00 0.07–0.12 0.24–0.33
1215 G12150 0.09 max 0.75–1.05 0.04–0.09 0.26–0.35
12L14d G12144 0.15 max 0.85–1.15 0.04–0.09 0.26–0.35

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