Product description：

INCONEL® alloy 617 is designated as UNS N06617 and Werkstoff Nr. 2.4663a.

Rod, Bar, Wire, and Forging Stock: ASTM B 166; ASME SB 166 (Rod, Bar and Wire), ASTM B 564; ASME SB 564 (Forgings), AMS 5887 (Bars, Forgings and Rings), VdTÜV 485 (Sheet, Plate, Bar and Tubing), ISO 9724 (Wire), DIN 17752 (Rod and Bar), DIN 17753 (Wire), DIN 17754 (Forgings)

Plate, Sheet, and Strip: ASTM B 168; ASME SB 168 (Plate, Sheet and Strip), AMS 5888 (Plate), AMS 5889 (Sheet and Strip), VdTÜV 485 (Sheet, Plate, Bar and Tubing), ISO 6208 (Plate, Sheet and Strip), DIN 17750 (Plate, Sheet and Strip).

Pipe and Tube: – VdTÜV 485 (Sheet, Plate, Bar, and Tubing), ISO 6207 (Tubing), ASTM B 546; ASME SB 546 (Pipe), DIN 17751 (Pipe and Tube)

Product characteristics：

1. All kinds of corrosive media in oxidation and reduction environments have excellent corrosion resistance
2. Excellent resistance to point corrosion and crevice corrosion, and will not produce stress corrosion cracking caused by chloride
3. Excellent resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid and the mixed acid of sulfuric acid and hydrochloric acid
4. Excellent corrosion resistance of various inorganic acid mixed solutions
5. When the temperature reaches 40℃, it can show good corrosion resistance in hydrochloric acid solutions of various concentrations
6. Good processability and weldability, no post-welding cracking sensitivity
7. With the wall temperature of -196 ~ 450℃ pressure vessel manufacturing certification
8. Certified by the American Society of Corrosion Engineers NACE Standard (MR-01-75) to meet the highest standard grade VII for use in acidic gas environments

Metallographic structure：

625 is a face-centered cubic lattice structure. When held at about 650℃ for a long time, carbon particles and unstable quaternary phases will be precipitated and will be transformed into stable NI3 (NB, TI) rhombic lattice phases. Molybdenum and niobium components in Ni-Cr matrix after solution strengthening will improve the mechanical properties of the material, but decrease the plasticity.

Corrosion resistance：

625 alloy shows excellent corrosion resistance in many media. Excellent resistance to pitting, crevice corrosion, intergranular corrosion and erosion in chloride media. It has good resistance to inorganic acid corrosion, such as nitric acid, phosphoric acid, sulfuric acid, hydrochloric acid, etc., and also has alkali and organic acid corrosion resistance in oxidation and reduction environments. Effective resistance to chloride ion reducing stress corrosion cracking. There is almost no corrosion in seawater and industrial gas environments, and it has high corrosion resistance to seawater and salt solutions, even at high temperatures. No sensitivity during welding. It is resistant to carbonization and oxidation in static or cyclic environments, and resistant to chlorine gas corrosion.

Chemical composition：

Executive standard：

Application field：

The softened and annealed low carbon alloy 625 is widely used in the chemical process industry, and its better corrosion resistance and high strength enable it to be used as a thinner structural component. 625 alloy can be used in contact with seawater and subjected to high mechanical stress.

Typical application areas:
1. Parts of organic chemical processes containing chlorides, especially where acid chloride catalysts are used
2. Digesters and bleaching tanks for the pulp and paper industry
3. Absorption tower, reheater, flue gas inlet baffle, fan (wet), agitator, baffle and flue in flue gas desulfurization system
4. For the manufacture of equipment and components for use in acidic gas environments
5. Acetic acid and acetic anhydride reaction generator
6. Sulfuric acid condenser