Expert knowledge

2
Nov

Types of stainless steels classified by their chemical composition (elements contained)

STAINLESS STEELS MARTENSITIC FERRITIC DUPLEX AUSTENITIC SUPER FERRITIC CLASSIC FERRITIC UTILITY FERRITIC LEAN DUPLEX DUPLEX SUPER DUPLEX CLASSIC AUSTENITIC (Cr, Ni, Mo) AUSTENITIC (Mn, Cr, N, Ni) HEAT-RESISTANT AUSTENITIC STANDARD CHROMIUM STAINLESS STEELS THAT CAN BE HARDENED BY HEAT TREATMENT. Cr: 12–18%, HIGH CARBON CONTENT: 0.2–1.2%. STANDARD CHROMIUM STAINLESS STEELS WITH LOW CARBON CONTENT, THEREFORE THEY CANNOT BE HARDENED BY
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2
Nov

Simplified comparison of different engineering materials

Stainless steel Properties EN 1.4521 AISI 444 EN 1.4301 AISI 304 EN 1.4401 AISI 316 Physical Density - - - Linear expansion ++ 0 0 Electrical conductivity -- - - Ferromagnetism Yes No No Mechanical Stiffness (Young’s modulus) +++ +++ +++ Strength + ++ ++ Elongation + +++ +++ Other Workability ++ ++ ++ High temperature resistance ++ ++ +++
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