Welded Hastelloy Pipe DIN 2.4602 ASME SB619 Nickel Cobalt Alloy OD 1/2" - 48"

Alloy C22 Hastelloy C22 DIN 2.4602 ASME SB619 Nickel-Cobalt Alloy Welded Pipe

ASTM B-619 , ASME SB-619

SPECIFICATION FOR WELDED NICKEL AND NICKEL COBALT ALLOY PIPE

This specification covers welded pipe of nickel and nickel-cobalt alloys (UNS N1000; UNS N100665; UNS N12160; UNS N10629; UNS N10675; UNS N10276; UNS N06455; UNS N06007; UNS N06975; UNS N08320; UNS N06002; UNSN06022; UNS N06059; UNS N06985; UNS N06030; UNS R30556; UNS N08031; UNS N06230; UNS N06686; and UNS R20033).

Hastelloy® C-22
UNS Number N06022
Other common names: Alloy C22
Hastelloy C22, also known as alloy C22, is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. 

What are the characteristics of Hastelloy C22?
Resistant to pitting, crevice corrosion and stress corrosion cracking
Outstanding resistance to both reducing and oxidizing media
Excellent resistance to oxidizing aqueous media
Exceptional resistance to a wide variety of chemical process environments including strong oxidizers such as ferric acids, acetic anhydride, and seawater and brine solutions
Resists the formation of grain-boundary precipitates in the weld heat-affected zone
Excellent weldability

Chemical Composition, %

In what applications is Hastelloy C22 used?

· Pharmaceutical industries use alloy C-22 fittings and tubing to avoid contamination caused by corrosion related failures

· Cellophane manufacturing

· Chlorination systems

· Pesticide production

· Incineration scrubber systems

· Chemical process industry in equipment like flue gas scrubbers, chlorination systems, sulfur dioxide scrubbers, pulp and paper bleach plants, pickling systems, and nuclear fuel reprocessing

· Waste water processing

Fabrication of Hastelloy C-22

Although ductile enough to be formed by cold working, intermediate annealing may be necessary due to work hardening. Forging should be performed between 1750-2050° F followed by rapid cooling. Annealing can be performed at a temperature range between 2020-2150° F followed by a rapid quench. Cooling at an accelerated rate avoids the formation of detrimental phases which form between 1400-1800° F. Welding can be done by gas tungsten-arc, gas metal-arc and shielded metal-arc processes.

ASTM Specifications

Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material