Super duplex stainless steels combine very high strength with excellent corrosion resistance, which makes them well suited to demanding work in the defence, chemical processing, oil and gas, and aerospace industries.
We think of ourselves as the home of super duplex. We have supplied specialist alloys for 80 years and created the world's first super duplex stainless steel nearly 50 years ago.
Our super duplex range
Ferralium® 255 has been developed steadily since its original invention and has proven to be a versatile alloy across a wide range of uses.
Our partnership with Alleima brings two originators of the super duplex market together: their SAF 2507 was first developed in the 1970s. We also carry extensive stocks of Alloy 32760, the third variant of the super duplex family, along with Alleima's Sanmac 2205, a duplex stainless steel with enhanced machinability as standard.
Why super duplex
Super duplex steels are chosen for a particular combination of properties:
- Significantly higher strength than many other alloys, allowing use in challenging applications and letting designers reduce section size to save cost.
- Excellent corrosion resistance, with Pitting Resistance Equivalent Numbers (PREN) >40, and reduced susceptibility to stress corrosion cracking - ideal for chemical processing and oil and gas.
- Strong cost competitiveness against alternative alloys, achieved by avoiding expensive nickel additions in favour of other elements.