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Duplex Stainless Steel Alloys

Our Duplex and Super-Duplex stainless steels are cost effective solutions to stress corrosion cracking. They offer high resistrance to this potential cause of sudden failure along with a greater resistance to pitting corrosion than is available with 316. And this is combined with high strength which allows for optimum material utilisation.

We have an extensive range of stock in these grades. Please contact us with details of your specific requirements or for Technical Data 

Related Duplex Stainless Steel Alloys
Product Major Applications Availability
Grade:
UNS S32550
W Nr. 1.4507
Composition:
64Fe-25Cr-5.7Ni-3.3Mo-2Cu-N

Copper containing austenitic-ferritic stainless steel. ALLOY 255 has the added benefit over ALLOY 2205 of being resistant to sulphuric and phosphoric acids over a range of conditions.

Imported; ex-stock or mill availability

Grade:
UNS S32760
W Nr. 1.4501
Composition:
64Fe-25Cr-7Ni-3.5Mo-0.75Cu-0.75W-N

A highly alloyed duplex stainless steel for use in seawater, brine and similar chloride containing environments. Corrosion and strength properties superior to those of ALLOY 2205.

Imported; ex-stock or mill availability

Grade:
UNS S32101
W Nr. 1.4162
Composition:
72Fe-21.5Cr-5Mn-1.5Ni-0.3Mo-N

A low-alloyed general purpose duplex grade displaying high strength and corrosion resistance on a par with most standard grades of stainless steel.

Selected items from local stock. Balance imported;ex-stock or mill availability

Grade:
UNS S31803
UNS S32205
W Nr. 1.4462
Composition:
69Fe-22Cr-5.7Ni-3Mo-N

A duplex stainless steel with excellent resistance to stress corrosion cracking. It displays a high yield strength as well as a useful resistance to pitting.

Selected items from local stock; balance imported; ex-stock or mill availability

Grade:
UNS S32750
W Nr. 1.4410
Composition:
66Fe-24Cr-6Ni-3Mo-N

As duplex stainless steel this alloy displays similar properties to ALLOY 2205. Strength is however greater as is resistance to pitting and crevice corrosion and resistance to stress corrosion and cracking.

Selected items from local stock; balance imported; ex-stock or mill availability