Super Duplex Steel

What is Super Duplex Steel?

Super Duplex stainless steels like Duplex, is a mixed microstructure of austenite and ferrite (50/50) which has improved strength over ferritic and austenitic steel grades. The main difference is that Super Duplex has a higher Molybdenum and Chromium content which gives the material greater corrosion resistance.


Super Duplex has the same benefits as its counterpart – it has lower production costs when compared with similar ferritic and austenitic grades and due to the materials increased tensile and yield strength, in many cases this gives the purchaser the welcomed option of purchasing smaller thicknesses without the need to compromise on quality and performance.

 

Super Duplex Steel Product Range

Zeon typically supplies Super Duplex Steel in the following forms:

Super Duplex Steel Grades

Zeon Grade Alloy Name UNS EN / DIN / W Nr. AISI / ASTM Trademarks
Zeon53 Alloy 2507 UNS S32750 1.441 F53 SAF2507/URANUS47N
Zeon55 Alloy 2507 UNS S32760 1.4501 F55 Zeon100
Zeon61 Alloy 255 UNS S32550 1.4507 F61 Ferralium255/URANUS52N

What are the Characteristics of Super Duplex Steel?

Characteristics of Super Duplex Steel
Physical properties that offer design advantages. Good resistance to stress corrosion cracking (SCC) in chloride-bearing environments. High resistance to general corrosion.
Very high mechanical strength. Good resistance to pitting and crevice corrosion. Good weldability and workability
High resistance to corrosion fatigue Suggested for applications up to 600° F Opportunity for purchases to reduce their material costs without compromising on quality
Greater tensile and yield strength Good ductility and toughness High resistance to erosion corrosion.

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