2.4856 metallographic structure:
The alloy in the solution state organization for the austenitic matrix and a small amount of TiN, NbC, and M6C phase by 650 ~ 900 ° C after long-term aging, the precipitation of phase γ ", δ, M23C6 and M6C.

1 for the oxidation and reduction of various corrosive media environment has very good corrosion resistance

(2) Excellent resistance to pitting and crevice corrosion, and will not produce as chloride stress corrosion cracking caused by

3 excellent corrosion resistance of inorganic acids such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and sulfuric acid and hydrochloric acid mixture

4 excellent resistance to corrosion of various inorganic acid mixed solution the ability to

5 temperature of 40 ℃, in various concentrations of hydrochloric acid are able to show good corrosion resistance

6 Good workability and weldability, no weld cracking sensitivity

7 with the wall temperature at -196 ~ 450 ℃ the pressure vessel manufacturing certificate

8 by the American Association of Corrosion Engineers standard NACE certification (MR-01-75) in line with sour gas environments of the highest standards of grade VII

 

2.4856 Chemical composition:

% Ni-Cr-Mo alloy Fe-Al-Ti-Nb-Ta phosphorus-sulfur carbon manganese silicon bronze

625 Minimum 58 208 3.15

     Maximum 23 10 4.15 5 0.4 0.4 0.1 0.5 0.5 0.5 0.015 0.015