Overview
Hastelloy C-22 (UNS N06022 / DIN 2.4602) is a Ni-Cr-Mo-W nickel superalloy with the best all-round corrosion resistance of any nickel alloy — PREN ≈ 66, superior to C-276. Higher chromium and lower carbon than C-276 give C-22 outstanding performance in both oxidizing and reducing media, with excellent resistance to pitting, crevice corrosion and stress corrosion cracking. As a specialized C22 round bar supplier, Vertex Alloy provides solution-annealed ground round bars from 5 to 250 mm to ASTM B574 with EN 10204 3.1 certificates, plus custom-machined parts per drawing. Non-magnetic, excellent weldability with no post-weld heat treatment required, and outstanding cryogenic impact toughness. C-22 is the material of choice for chemical processing, FGD scrubbers, pharmaceutical tooling, marine, nuclear waste storage and petrochemical sour gas service. Contact us for latest stock and pricing.
Description (English)
Hastelloy C-22 (UNS N06022, DIN 2.4602) is a Ni-Cr-Mo-W solid-solution strengthened nickel superalloy offering the best all-round corrosion resistance of any nickel alloy. With higher chromium (20–22.5%) and lower carbon (≤ 0.015%) than C-276, C-22 excels in both oxidizing and reducing environments, resisting pitting (PREN ≈ 66), crevice corrosion and stress corrosion cracking. Vertex Alloy supplies C-22 solution-annealed ground round bars from 5 to 250 mm to ASTM B574 with EN 10204 3.1 certificates, plus custom-machined parts per drawing. Non-magnetic, excellent weldability (no PWHT required), outstanding impact toughness at cryogenic temperatures. Widely used in chemical processing, pharmaceutical tooling, FGD scrubbers, marine, nuclear waste storage and petrochemical sour gas service.
Size Range
- Ground Round Bar (h8):5 – 250 mm
- Peeled Bar (h9/h10):20 – 300 mm
- Black Bar (as-forged):30 – 350 mm
- Bar Length: 1500 – 6000 mm
- Custom Length:Available on request
- Tolerance Options: h7 / h8 / h9 / h10
- Custom Machining:Available per drawing
Grade Specification
| System | Value |
|---|---|
| UNS (USA) | N06022 |
| DIN / EN (Germany/EU) | 2.4602 / NiCr21Mo14W |
| Haynes Trademark | HASTELLOY® C-22® |
| GB (China) | NS 338 / 00Cr22Ni60Mo13W3 |
| ISO | NiCr21Mo14W |
| Common Names | Alloy 22 |
Chemical Composition
| Element | Value |
|---|---|
| Ni | Balance (≥ 56) |
| Cr | 20.0 – 22.5 |
| Mo | 12.5 – 14.5 |
| W | 2.5 – 3.5 |
| Fe | 2.0 – 6.0 |
| Co | ≤ 2.5 |
| C | ≤ 0.015 |
| Mn | ≤ 0.50 |
| Si | ≤ 0.08 |
| V | ≤ 0.35 |
| P | ≤ 0.02 |
| S | ≤ 0.02 |
Mechanical Properties
| productCenter.property | Value |
|---|---|
| Tensile Strength | ≥ 690 MPa |
| Yield Strength (0.2% offset) | ≥ 283 MPa |
| Elongation | ≥ 45 % |
| Reduction of Area | ≥ 50 % |
| Hardness | ≈ 87 HRB (190 HB) |
| Impact Toughness (Charpy V, −196 °C) | ≥ 100 J |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density | g/cm³ | 8.69 g/cm³ |
| Melting Range | °C | 1351 – 1387 °C |
| Specific Heat Capacity | J/kg·K | 414 J/(kg·K) |
| Thermal Conductivity | W/m·K | 10.1 W/(m·K) |
| Electrical Resistivity | μΩ·cm | 1.28 μΩ·m |
| Elastic Modulus | GPa | 205 GPa |
| Poisson's Ratio | - | 0.30 |
| Thermal Expansion (20–100 °C) | ×10⁻⁶/K | 12.4 × 10⁻⁶ /K |
| Magnetic | - | No (non-magnetic) |
Applications
- Chemical Processing:Reactor vessels, heat exchangers, piping, valves, agitators
- Pharmaceutical:Tablet press punches, dies, capsule filler tooling
- Flue Gas Desulfurization (FGD):Scrubber internals, dampers, absorber outlet dampers
- Waste Incineration:Boiler internals, wet scrubbers, ductwork
- Marine / Offshore:Seawater piping, heat exchanger tubes, splash-zone fasteners
- Nuclear:Radioactive waste container shells, long-term storage overpacks
- Petrochemical:Sour gas service, acid gas removal units, refinery piping
- Pulp & Paper:Bleach plant washers, piping in chloride environments
- Pollution Control:Stack liners, scrubber components, wastewater treatment