Alloy 31

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alloy 31 grade alloy 31 uns n08031
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Description

Some features of Alloy 31 are:

- Excellent resistance to corrosion and erosion in phosphoric acid media

- Excellent resistance to general and localized corrosion in Chloridoxid bleaching plants in paper production

- Certification to ISO 15156/MR 0175 to level VI for sour gas applications in the oil and gas industry

- Excellent resistance in reducing and oxidizing media, as well as in boiling 67% nitric acid

- Excellent corrosion resistance in alkaline and acid halide media

- Approval for pressure vessels with operating temperatures from -196 to 550 ° C

- Good processability and weldability

-Excellent resistance to sulfuric acid in a highly concentrated form

Chemical composition of Alloy 31

C
≤ %
Si
≤ %
Mn
≤ %
P
≤ %
S
≤ %
Cr
%
Mo
%
Ni
0 – 0,015 0 – 0,3 0 – 2,0 0 – 0,02 0 - 0,01 26 - 28,0 6,0 – 7,0 30 – 32,0
N
%
Cu
≤ %
Fe
0,15 – 0,25 1,0 – 1,4 Rest

Characteristics of Alloy 31

Temperature Range Material for wet corrosion
Density 8,1 g/cm³
Elongation at break of Alloy 31 ≥ 40 %
ISO-V notch impact toughness ≥ 185 J/cm² at room temperature
≥ 140 J/cm² at -196°C

 

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