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

STAINLESS STEELS
MARTENSITICFERRITICDUPLEXAUSTENITIC
SUPER FERRITICCLASSIC FERRITICUTILITY FERRITICLEAN DUPLEXDUPLEXSUPER DUPLEXCLASSIC 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 HEAT TREATMENT.
GENERALLY KNOWN AS POORLY WELDABLE, EXCEPT FOR UTILITY GRADES.
MIXED FERRITIC–AUSTENITIC STRUCTURE (DUPLEX).
HIGH Cr AND LOW Ni CONTENT COMPARED TO AUSTENITIC STEELS.
CONTAIN NITROGEN ADDITION. HIGH STRENGTH AND GOOD CORROSION RESISTANCE.
GOOD WELDABILITY.
STAINLESS STEELS CONTAINING NICKEL.
THE MOST COMMON STAINLESS STEEL GRADES, ACCOUNTING FOR ABOUT 70% OF APPLICATIONS.
HIGH CORROSION RESISTANCE AND EXCELLENT OVERALL PROPERTIES.
SUITABLE FOR A WIDE RANGE OF APPLICATIONS.

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