Stainless Steel

Types of stainless steel

Austenitic stainless steel

• Contains Cr more than 17% Ni more than 7%
• Austenite is stabilized at all temperature
• Good ductility, toughness & weldability.

Ferritic stainless Steel

• Primary Iron-Chromium alloy
• High Cr contents provide good resistant to scaling at high temp
• Difficult to weld

Martensitic Stainless steel

• Fe- Cr alloys with less Cr and more Carbon
• On heating transforms to austenite & on cooling transforms to Martensite
• High hardenability characteristic & low ductility
• Preheat & post heat treatment is recommended.

Duplex Stainless Steel

• Consists of two microstructure phases
• Has alloying elements like Mo, N, Cu, W, Ni etc
• Has high strength, Good toughness & high corrosion resistance

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