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30CrMo Spring Steel

30CrMo is a medium carbon chromium molybdenum alloy structural steel with high strength, good toughness, excellent hardenability, and fatigue resistance. It is widely used in key components that withstand high loads or impact loads in fields such as mechanical manufacturing, petrochemicals, and automotive industry. The following provides a detailed analysis from the aspects of chemical composition, mechanical properties, heat treatment process, application fields, and processing characteristics.
Availability:
CSiMnSMoPS
Ni/Cu
0.26~0.340.17~0.370.40~0.700.80~1.100.15~0.25≤0.035≤0.035≤0.030


Production process

This steel has high strength and toughness, high hardenability, and a critical hardenability diameter of 15-70mm in oil. The thermal strength of the steel is also good, with sufficient high-temperature strength below 500 ℃, but its strength significantly decreases at 550 ℃; When the alloy element is at the lower limit, the welding is quite good, but when it approaches the upper limit, the weldability is moderate, and it needs to be preheated to above 175 ℃ before welding; Steel has good machinability and moderate plasticity during cold deformation; There is a first type of tempering brittleness in the temperature range of 300-350 ℃ during heat treatment; There is a tendency to form white spots.


Application examples

  1.  Mechanical manufacturing

  2. Gears

  3. Shaft components

  4. Petrochemical industry

  5. Automotive industry

  6. Energy equipment



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