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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