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STEEL BARS

HEAT TREATABLE STEEL

Heat-treatable steels are in the mechanical construction steel range. They are characterized by carbon content usually in excess of 0.25%, and may or may not be alloys. 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 attained by means of quenching and tempering, which comprise the heat-treatment process.

4340

CHARACTERISTICS

Responds well to heat treatment, particularly for larges cross sections. Offers a good combination of strength, ductility and tenacity.

APPLICATIONS

Truck, tractor and car camshafts, gears, arms and wheelends, and large cross-section tempered 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 – 0,900,20 – 0,30-

THERMAL TREATMENT AND PROCESSING TEMPERATURES (°C)

Forging - Max.ReheatingNormalizationQuenchingQuenching MediumCementationTempering
1.232 - 982790 - 845870 - 925815 - 855óleo--