– Tensile strength: 1000-1200 MPa
– Yield strength: 850-1000 MPa
– Elongation: 12-18%
– Impact toughness: 30-40 J/cm2
– Hardness: 270-330 HB
Technical properties:
– Good fatigue resistance
– Excellent hardenability
– High strength and toughness
– Good machinability
– Good dimensional stability
Chemical composition:
– Carbon (C): 0.36-0.44%
– Silicon (Si): 0.10-0.40%
– Manganese (Mn): 0.50-0.80%
– Phosphorus (P): ≤ 0.025%
– Sulfur (S): ≤ 0.025%
– Chromium (Cr): 0.50-0.80%
– Nickel (Ni): 1.40-1.70%
– Molybdenum (Mo): 0.15-0.25%
This case study demonstrates how the 40NiCrMo2 KB steel grade exhibits excellent mechanical properties, technical properties, and a well-balanced chemical composition, making it a suitable material for applications that require high performance, strength, and toughness.
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