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Hastelloy C-22

Designated as UNS N06022 or DIN 2.4602, Hastelloy C-22 (also known as “Alloy C-22”), is a nickel-chromium-molybdenum alloy with outstanding resistance to pitting, crevice corrosion, and stress-corrosion cracking. It also exhibits high resistance to oxidizing media, including wet chlorine and mixtures containing nitric and oxidizing acids. Compared to Hastelloy C-276, Hastelloy C-22 has better corrosion resistance in both general conditions or high concentrates of chloride at elevated temperatures as well as other highly oxidizing environments.

Hastelloy C-22 weld neck flanges

Hastelloy C-22 weld neck flanges, manufactured to ASME B16.47 Series A.

1. Chemical Composition Requirements

Nominal Chemical Composition of Hastelloy C-22, %
NickelBalance
Chromium22
Molybdenum13
Iron3
Cobalt≤2.5
Tungsten3
Manganese≤0.5
Silicon≤0.08
Carbon≤0.01
Vanadium≤0.35
Copper≤0.5

2. Typical Physical Properties

DensityElectrical ResistivitySpecific HeatMelting Range
lb/in3g/cm3µohm.inµohm.mBtu/lb.°FJ/kg*°C°F°C
0.3148.6944.91.140.0984142475-25501357-1399

3. Product Forms and Standards of Hastelloy C-22

Products FormStandard
Sheet, Plate & StripASTM B575
Billet, Rod & BarASTM B574, B472
Coated ElectrodesDIN 2.4638
Bare Welding Rods& WireDIN 2.4635
Seamless Pipe & TubeASTM B622
Welded Pipe & TubeASTM B619, B626
FittingsASTM B366, B462
ForgingsASTM B564, B462
*The mechanical properties of Hastelloy C-22 vary in different forms and heat treatment conditions.

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    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
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