High-chromium Alloy 31 UNS N08031 seamless pipe
-
Introduction of High-chromium Alloy 31 UNS N08031 seamless pipe:
-
Alloy 31 is an iron-nickel-chromium-molybdenum alloy with nitrogen addition
-
It has a pitting resistance in high chloride environments between those of super-austenitic stainless steels and nickel alloys
-
The alloy has very good corrosion resistance in mixed acid and high chloride environments
-
The material is approved in ISO 15156/ NACE MR0175 to test level VI for sour gas service
-
Features of High-chromium Alloy 31 UNS N08031 seamless pipe:
-
Has excellent resistance to localized corrosion in halide media, both pitting and crevice corrosion
-
It also provides the following:
-
Outstanding resistance to sulfuric acid
-
Excellent resistance to phosphoric acid
-
Good resistance to nitric and nitric/ hydrofluoric acid mixtures
-
Excellent resistance to chlorine dioxide media in the pulp and paper industry
-
Excellent resistance to both oxidizing and reducing media
-
Good resistance to stress corrosion cracking
-
ASME SCVIII DIV 1 coverage to 430°C (800°F)
-
ASTM coverage
-
NACE MRO-175 coverage to level 6
-
Excellent fabric ability with good thermal stability
-
Applications of High-chromium Alloy 31 UNS N08031 seamless pipe:
-
Control lines
-
Control and instrumentation tubes
-
Heat exchangers
-
Chemical processing
-
Oil and gas