Carbon

1018 Steel

Low-carbon steel

Low-carbon steel (SAE 1018), sold mainly as round, square, and hex bars and flat bars. It offers good machinability, excellent weldability, and easy forming; it is supplied mostly cold drawn (calibrated). For shafts, pins, bolts, bushings, keys, and machined components; suitable for carburizing.

Standards and equivalents

SAE / AISI	EN	DIN	JIS
1018	—	—	—

Chemical composition

%	C	Mn	P	S
Min	0.15	0.60	—	—
Max	0.20	0.90	0.040	0.050

Supply condition

Hot rolledUntreated

Cold drawnUntreated

Available package sizes

Round bars1/8" – 6 1/2"3.2 mm – 165.1 mm

Square bars1/8" – 4"3.2 mm – 101.6 mm

Hex bars3/8" – 2"9.5 mm – 50.8 mm

Flat bars1/8"×1/2" to 3"×8"3.2×12.7 to 76.2×203.2 mm

Typical applications

• Axles and shafts
• Bolts and screws
• Bushings and sleeves
• Low-load gears
• Pinions and sprockets
• Automotive components
• CNC machined parts
• Supports and couplings
• Case-hardened and carburized parts

Note: The information and values in this data sheet are provided for reference only and may vary depending on manufacturing, treatment and application conditions. They do not constitute guaranteed specifications, so use and interpretation of this data is the user's responsibility.

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