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The microstructures inside duplex stainless steels are approximately 50 per cent austenite and 50 per cent ferrite, and consequently duplex steel tube share the physical properties of both ferritic and austenitic grades. Duplex stainless steel has excellent chloride and stress corrosion resistant porperties. it is suitable to apply in oil refining, petroleum and gas industry on the ground and sea situation. Duplex stainless steel has roughly twice the yield strength of their counterpart austenitic grades, so it could be produced as thinner gauge tubing and high precision tubes.

Max Stainless Steel (CNMAX)manufactures duplex stainless steel tubes in the following grades:

Alloy

UNS

WNR

Duplex

S31803

1。4462

Super Duplex

S32750

1。4410

Super Duplex

S32760

1.4501


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