Valve Material Reference
ASTM B575 / UNS N06022 (Hastelloy C-22) Valve
Hastelloy C-22 / Alloy C-22Hastelloy C-22 (UNS N06022) is a nickel-chromium-molybdenum-tungsten alloy with superior resistance to a wider range of oxidising and reducing corrosive environments than Hastelloy C-276.
Form
Both
Max Temp
+650°C (+1200°F)
Min Temp
−196°C (−321°F)
Category
Nickel Alloy
What is ASTM B575 / UNS N06022 (Hastelloy C-22)?
ASTM B575 / UNS N06022 (Hastelloy C-22) (Hastelloy C-22 / Alloy C-22) is a nickel alloy valve material. Hastelloy C-22 (UNS N06022) is a nickel-chromium-molybdenum-tungsten alloy with superior resistance to a wider range of oxidising and reducing corrosive environments than Hastelloy C-276. Temperature range: −196°C to +650°C (−321°F to +1200°F).
- Form:
- both
- Max Temp:
- +650°C (+1200°F)
- Min Temp:
- −196°C (−321°F)
Chemical Composition - ASTM B575 / UNS N06022 (Hastelloy C-22)
Temperature Range
−196°C to +650°C (−321°F to +1200°F)
Maximum Temperature
+650°C (+1200°F)
Minimum Temperature
−196°C (−321°F)
Vajra Industrial Solutions manufactures and supplies valves in ASTM B575 / UNS N06022 (Hastelloy C-22) (Hastelloy C-22 / Alloy C-22) for mixed oxidising-reducing acid environments (h₂so₄ + hno₃ mixtures), with EN 10204 3.1 material traceability on every order.
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Equivalent Grades - ASTM B575 / UNS N06022 (Hastelloy C-22)
| Standard | Equivalent Grade |
|---|---|
| UNS | N06022 |
| ASTM | B575 (plate), B619 (pipe), B564 (forged fittings) |
| EN | NiCr21Mo14W / 2.4602 |
Suitable Services
Mixed oxidising-reducing acid environments (H₂SO₄ + HNO₃ mixtures)
Wet chlorine and hypochlorite service
Flue gas desulphurisation (FGD) scrubbers
Pharmaceutical and fine chemical synthesis
Waste acid treatment and neutralisation
Not Suitable For
Concentrated hydrofluoric acid - use Monel 400
Pure strong reducing environments - C-276 is equivalent or better at lower cost
Valve Body Applications
Multipurpose chemical plant valves for mixed acid and salt service
Flue gas desulphurisation (FGD) wet scrubber valves
Pharmaceutical active pharmaceutical ingredient (API) plant valves
Waste treatment and hazardous waste handling valves
Trim Applications
Ball valve balls for highly corrosive chemical service
Globe valve seat and disc for mixed acid service
Valve positioner and instrument body parts in aggressive environments
Typical Valve Types in ASTM B575 / UNS N06022 (Hastelloy C-22)
Ball valves: multipurpose chemical, Class 150–600
Globe valves: control valves in acid service
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Technical Reference
Industry Applications · 10 min read
How to Specify Industrial Valves for Chemical Service: A Complete Guide
Chemical plants handle some of the most aggressive fluids in any industry - strong acids, chlorinated solvents, caustic solutions, oxidising agents, and toxic gases. Specifying the wrong valve body material, seat, or seal material can lead to catastrophic corrosion, product contamination, or unsafe failure. This guide covers every variable in chemical valve specification.
All Valve Materials
Connected Engineering
Need ASTM B575 / UNS N06022 (Hastelloy C-22) Valves?
We supply ASTM B575 / UNS N06022 (Hastelloy C-22) (Hastelloy C-22 / Alloy C-22) valves with full certification documentation — EN 10204 3.1/3.2 MTCs and hydrotest certs as standard.