– Tensile strength: 900-1100 MPa
– Yield strength: 700-900 MPa
– Elongation: 12-16%
– Impact strength: 20 J at -20°C
Technical Properties:
– Heat treatment: Annealing, hardening, tempering
– Machinability: Good
– Weldability: Good with preheating and post-weld heat treatment
– Corrosion resistance: Fair
– Wear resistance: Good
Chemical Composition:
– Carbon (C): 0.17-0.23%
– Silicon (Si): 0.40% max
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): 0.035% max
– Sulfur (S): 0.035% max
– Chromium (Cr): 0.50-0.80%
– Nickel (Ni): 2.50-3.50%
– Molybdenum (Mo): 0.20-0.35%
Applications:
– 21NiCrMo2 steel is commonly used in the production of gears, shafts, and other components in the automotive, aerospace, and machinery industries. Its high strength and good wear resistance make it suitable for heavy-duty applications. Additionally, its good machinability and weldability make it a versatile choice for various manufacturing processes.
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