4142 Steel
SAE 4142 is a chromium-molybdenum alloy steel engineered for high-strength, wear-resistant, and tough applications. The combination of alloying elements enhances hardenability and mechanical performance.
grades designations
SAE 4142 is furnished to defined chemical composition ranges and mechanical property requirements. In general form, the alloy includes approximately 0.40-0.45% carbon, 0.75-1.00% manganese, 0.80-1.10% chromium, and 0.15-0.25% molybdenum, with silicon typically around 0.15-0.35% and phosphorus/sulfur maintained at low levels.
4142 Characteristics
Property
specification
Weldability
SAE 4142 offers good weldability for a medium-alloy steel, but proper welding procedure is important to avoid cracking or loss of toughness.
Thermal Cutting
Edge hardening or undesirable microstructure changes may occur.
Bendability
In the annealed or normalized state, 4142 exhibits reasonable formability and bendability for fabrication.
Ease of Fabrication
4142 is machinable and fabricable, particularly in softened states.
