Mechanical Properties:
– Tensile Strength: 550-700 MPa
– Yield Strength: 250-275 MPa
– Elongation: 15-20%
– Hardness: 269 Brinell
Technical Properties:
– Good machinability
– Good resistance to corrosion in mild environments
– Limited resistance to pitting and crevice corrosion
– Not suitable for use in marine or chloride environments
Chemical Composition:
– Carbon: 0.15% max
– Chromium: 12-14%
– Manganese: 1.25% max
– Phosphorus: 0.06% max
– Sulfur: 0.15% max
– Silicon: 1% max
The 416S21 steel grade is a martensitic, free-machining stainless steel with added sulfur, which provides good machinability. It is often used in applications where corrosion resistance is not the primary concern, such as pump shafts, valve components, and firearms. Due to its limited corrosion resistance, it is not recommended for use in marine or chloride environments. However, its high machinability makes it a popular choice for components that require intricate machining.
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