Heat Treatment: The 431S29 steel grade can be hardened by heat treatment to achieve higher strength and hardness. The recommended heat treatment process involves heating the steel to 870-900°C, then quenching in oil or air. Subsequent tempering at 300-650°C is also recommended to achieve the desired mechanical properties.
Chemical Composition: The 431S29 steel grade is a martensitic stainless steel, with a chemical composition consisting of:
– Carbon (C): 0.20-0.25%
– Silicon (Si): 1.00% max
– Manganese (Mn): 1.00% max
– Phosphorus (P): 0.040% max
– Sulfur (S): 0.030% max
– Chromium (Cr): 15.00-17.00%
– Nickel (Ni): 1.25-2.50%
– Molybdenum (Mo): 0.20-0.60%
This composition gives the steel its martensitic structure and significant strength and toughness. However, the presence of chromium and nickel also contributes to its corrosion resistance properties.
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