42 cr mo
The 42 CrMo, also known as 42CrMo4 or AISI 4140, is a versatile chromium-molybdenum alloy steel that offers an exceptional combination of strength, toughness, and wear resistance. This medium-carbon steel contains approximately 0.42% carbon, enhanced with chromium and molybdenum additions that significantly improve its mechanical properties. The material exhibits excellent hardenability and maintains its strength at elevated temperatures, making it ideal for demanding industrial applications. When properly heat-treated, 42 CrMo demonstrates remarkable tensile strength ranging from 900 to 1200 MPa, coupled with good ductility and impact resistance. The presence of chromium enhances corrosion resistance while molybdenum improves the steel's creep resistance and high-temperature performance. This material finds extensive use in manufacturing critical components such as gears, shafts, axles, and other high-stress mechanical parts. Its consistent microstructure and reliable performance across various operating conditions have made it a preferred choice in automotive, aerospace, and heavy machinery industries.