ASTM A622 Nickel Alloy C22 / UNS N06022 Pipe For Petrochemical

Nickel Alloy C-22 is a versatile Ni-Cr-Mo-W alloy with better comprehensive corrosion resistance performance than other Ni-Cr-Mo alloys, including Alloy C-276, Alloy C-4 and Alloy 625. Alloy C-22 has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions. It also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. So it can be used where “upset” conditions are likely to occur or in multi-purpose plants.

1. Grade : UNS N06022, N06625 ,N06600 , N06601 , N07718 , N10276 , N08800 ,  N08825 ,N04400 ; etc 

2 . OD ( Outer Diameter ) : 6.35mm to 114.3mm

3 . WT ( Wall Thickness ) : 1.65mm to 20mm

4 . Length : As customer’s requirement

5 . Standard : ASTM B163; ASTM B167; ASTM B444; ASTM B622 etc

6 . Technology : Cold Drawn / Cold Rolled

 Nickel Alloy C22 Chemical composition:

Features: Nickel Alloy C-22 is a versatile Ni-Cr-Mo-W alloy with better comprehensive corrosion resistance performance than other Ni-Cr-Mo alloys, including Alloy C-276, Alloy C-4 and Alloy 625. Alloy C-22 has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions. It also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. So it can be used where “upset” conditions are likely to occur or in multi-purpose plants.

Manufacture of Hastelloy C22:

Although toughness is sufficient to develop by cold working, intermediate annealing may be necessary due to work hardening. Forging should be done between 1750-2050°F, followed by rapid cooling. Annealing can be done in the temperature range of 2020-2150°F, followed by rapid quenching. Accelerated cooling avoids the formation of harmful phases between 1400-1800°F. Welding can be performed by tungsten gas shielded arc, metal gas shielded arc and protected metal arc processes.