AISI and SAE Carbon and Alloys Steels (Additional Information)

Classification	ASTM Forging Specification	Material Grade Designation	UNS #	Chemical Composition	General Application
Low Carbon Steel	A29	AISI 1018 Thru AISI 1030	G10180 Thru G10300	C 0.18-0.34, Mn 0.60-0.90, P 0.040 max, S 0.050 max	General screw machine parts, carburized components, sprocket and chain assemblies, piping components, bolts, nuts, shafts & pins
Medium Carbon Steel	A29	AISI 1030 Thru AISI 1050	G10300 Thru G10500	C 0.28-0.55, Mn 0.60-0.90, P 0.040 max, S 0.050 max	Couplings, Crankshafts, Heat Treated Machine Parts, Crane Hooks
High Carbon Steel	A29	AISI 1050 Thru AISI 1090	G10500 Thru G10900	C 0.48-0.98, Mn 0.60-0.90, P 0.040 max, S 0.050 max	Tough and Hard Steel. Screw Drivers, Hammers, Chisels, Punches and Misc. Hand Tools
Chrome - Molybdenum Alloy Steel	A29	AISI 4118 Thru AISI 4160	G41180 Thru G41600	C 0.18-0.62, Cr 0.40-0.90, Mn 0.70-1.00, Mo 0.08-0.35, P 0.035 max, S 0.040 max, Si 0.15-0.35	Gears, Heat Treated Bolts, Nuts & Studs, Propeller Shafts, Steering components
Nickel - Chrome - Molybdenum Alloy Steel	A29	AISI 4320 Thru AISI 8640	G43200 Thru G86400	C 0.17-0.43, Cr 0.40-0.60, Mn 0.45-1.00, Mo 0.20-0.25, Ni 0.04-2.00, P 0.035 max, S 0.040 max, Si 0.15-0.35	Aircraft engine, wing & ski mounts, Valve Bodies and other high strength piping components, Bearings & Sleeves