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STEEL BARS

Engineering steels are among the steels for mechanical construction and are characterized by a carbon content generally above 0.25%, and can be alloyed or unalloyed. Heat-treatable steels are used to fabricate parts that require a combination of strength and tenacity, with relatively uniform values throughout the cross section or down to a certain depth. These properties are obtained through heat treatments such as quenching and tempering, which constitute the process known as beneficiation.

Steel 4340

CHARACTERISTICS

It exhibits good response to heat treatment, especially for large sections. It has a good combination of strength, ductility, and toughness.

APPLICATIONS

Truck, tractor and automobile crankshafts, gears, axle arms and shaft ends, and large section hardened parts in general.

SIMILAR MATERIALS

COPANT 4340; SAE 4340; AISI 4340; UNS G43400; DIN 40CrNiMo6 (1.6565); JIS SNCM 6;

WEIGHT CALCULATOR

Chemical Composition (% BY WEIGHT)

CMnPSSiNiCrMoV
0,38 – 0,430,60 – 0,800,0300,0400,15 – 0,351,65 – 2,000,70 – 0,90 0,20 – 0,30

THERMAL TREATMENT AND PROCESSING TEMPERATURES (°C)

Forjamento Máx.AnnealingStandardizationHardeningMeans of HardeningCementationTempering
1.232 - 982790 - 845870 - 925815 - 855oil