Seamless 6096mm Annealed Duplex Steel Tube ASTM A789 UNS S31803

Product Description

Seamless 6096mm Annealed Duplex Steel Tube ASTM A789 UNS S31803

The main differences in composition, when compared with an austenitic stainless steel is that the duplex steels have a higher chromium content, 20–28%; higher molybdenum, up to 5%; lower nickel, up to 9% and 0.05–0.50% nitrogen. Both the low nickel content and the high strength (enabling thinner sections to be used) give significant cost benefits. They are therefore used extensively in the offshore oil and gas industry for pipework systems, manifolds, risers, etc. and in the petrochemical industry in the form of pipelines and pressure vessels.

Application 

a) Petroleum

b) Chemical industry

c) Instrument

d) Industrial transportation

e) Mechanical structure industry

f) Need high corrision ability pipe's industry, such as offshore industry etc

Advantages

a) Superior surface finish,

b) Better mechanical property

c) More precise dimension

d) Perfect inspection method and inspection equipment