What are the 20Mn2 steel characteristics?
Jul 27, 2020
20Mn2 steel is an alloy structural steel under GB/T 3077-2015.
20Mn2 steel characteristics
- With medium strength. 20Mn2 steel has high plasticity during cold deformation, excellent low temperature function, acceptable weldability and machinability. Compared with carbon steel with corresponding carbon content, 20Mn2 steel hardenability is higher, the critical hardenable diameter in oil is 4-15 mm, but it has the tendency of overheating, decarburization sensitivity and temper brittleness during heat treatment. 50mm thickness 20Mn2 alloy structural steel guarantee performance/price/performance.
- This kind of steel has suitable hardenability, after suitable metal heat treatment, the microscopic arrangement is uniform sorbite, bainite or very fine pearlite, so it has high tensile strength.
Heat treatment process of 20Mn2 steel
Tempering temperature/℃: 220 ; Coolant: Water, air
Heat treatment: quenching (water, oil quenching), first quenching 850, tempering (water, air cooling), carburizing.
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