Mechanical Properties:
– High tensile strength
– Good fatigue resistance
– Excellent hardenability
– High impact toughness
– Good wear resistance
– Good dimensional stability
Technical Properties:
– Heat treatable for improved mechanical properties
– Good machinability
– Weldable
– Can be nitrided for increased surface hardness
Chemical Composition:
– Carbon (C): 0.37 – 0.45%
– Silicon (Si): 0.40% max
– Manganese (Mn): 0.50 – 0.80%
– Phosphorus (P): 0.025% max
– Sulfur (S): 0.020% max
– Chromium (Cr): 0.90 – 1.20%
– Nickel (Ni): 1.30 – 1.70%
– Molybdenum (Mo): 0.15 – 0.25%
Innovative Uses:
– Automotive industry: 40NiCrMo2 KB steel can be used in the production of critical automotive components such as gears, shafts, and crankshafts due to its high tensile strength and good fatigue resistance. It can also be used in high-performance racing vehicles for its excellent hardenability and impact toughness.
– Aerospace industry: The steel’s high impact toughness, good wear resistance, and dimensional stability make it suitable for aerospace applications, such as aircraft landing gear components, where reliability and durability are crucial. Additionally, its heat treatable properties allow for the production of high-strength components for aerospace applications.
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