Hastelloy C-22 Seamless Pipe Fluid Use ASTM B622 ASTM B619
Hastelloy C-22 is another high-performance
nickel-chromium-molybdenum-tungsten alloy known for its outstanding
resistance to a wide range of chemical process environments,
including strong oxidizers such as ferric acids, acetic anhydride,
and seawater. It’s recognized for being one of the most versatile
corrosion-resistant alloys available. Here are the details of
Hastelloy C-22 nickel alloy forged rings:
Physical Properties:
- Density: 8.69 g/cm³
- Melting Range: 1399-1446°C (2550-2635°F)
Heat Treatment:
Forging of Hastelloy C-22 should be performed between 1750℉ and
2050℉ (955℃ and 1121℃), and the material should be rapidly cooled
afterward. This alloy is not hardenable by heat treatment.
Corrosion Resistance:
Excellent resistance to pitting, crevice corrosion, and
stress-corrosion cracking. Ability to withstand a variety of
chemical environments, including those with oxidizing and reducing
conditions.
Applications:
Due to its excellent mechanical properties at both ambient and
elevated temperatures, Hastelloy C-22 is used in:
- Chemical processing
- Pollution control
- Pulp and paper production
- Waste treatment
- Marine engineering
- Specialty and industrial heat exchangers
Standards:
The forged rings of Hastelloy C-22 must comply with various
standards, including ASTM B574, B564, as well as ASME SB574, SB564
for chemical composition, mechanical properties, and acceptable
manufacturing practices.
Fabrication:
Despite its high strength, Hastelloy C-22 can be fabricated using
techniques similar to those used for stainless steels.
In summary, Hastelloy C-22 forged rings offer advanced corrosion
resistance and are used in applications requiring materials capable
of withstanding harsh chemical environments. When specification is
required, it is important to collaborate closely with manufacturers
to adhere to strict standards that ensure the quality and
performance of the final product.
| Grade | UNS | Density (g/cm3) | Tensile Strength (MPa min) | Yield Strength (MPa min) | Reduction of Area min (%) | Elongation min (%) | Hardness (HRC) |
| HASTELLOY C-22 | N06022 | 8.69 | 690 MPa min | 310 MPa min | / | 60% min | HRC 41 max |
| Ni | Mo | Cr | Fe | Co | P | W |
| Remainder | 12.5-14.5 | 20.0-22.5 | 2.0-6.0 | 2.5max | 0.02max | 2.5-3.5 |
| V | C | Mn | Si | S | | |
| 0.35max | 0.015max | 0.5max | 0.08max | 0.02max | | |
