G1033

Alloy Steel

G1033

UNS G-series alloy steel G1033

Chemical Composition (%)

C0.33
MN0.3
P0.04
S0.05

Applications

Carbon / low-alloy engineering steel per SAE-AISI UNS system.

Available Forms

Bar, plate, sheet, tube, forgings, strip, wire

Uses

Medium-carbon grade for machine parts such as gears, crankshafts, axles, connecting rods, spindles and forgings that need a balance of strength, toughness and machinability. Commonly supplied as bar, plate, sheet, tube and forging.

Heat Treatment

Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.

Precautions

Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating).

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