ARK Stainless Inc. is a leading manufacturer and supplier of high-performance Hastelloy Buttweld Fittings, specifically engineered to excel in high-pressure, stress, and corrosive environments. Known for their leak-proof design and exceptional durability, these fittings are perfect for a broad range of industrial applications such as fluid and gas distribution systems.
We offer top-grade materials such as Hastelloy C22 and Hastelloy C276, celebrated for their outstanding resistance to oxidation, corrosion, and harsh chemicals. These alloys provide moderate tensile and yield strength, high melting points up to 1443°C (2430°F), and elongation capacities up to 30%. Our Hastelloy buttweld fittings are available in multiple forms, including Seamless, ERW, Welded, and Fabricated. Manufactured to global standards like ASTM B366 / ASME SB366 and dimensional specifications such as ASME B16.9, B16.28, and MSS-SP-43, they ensure excellent performance and quality for critical sectors like petrochemicals, nuclear power, acid processing, and oil refineries.
| Grade | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P |
|---|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C22 | 0.010 max | 0.50 max | 0.08 max | 0.02 max | 2.50 max | 50.015 max | 20.00 - 22.50 | 2.00 - 6.00 | 12.50 - 14.50 | 0.02 max |
| Hastelloy C276 | 0.01 max | 1.0 max | 0.08 max | 2.50 max | Balance | 14.5-16.5 | 4-7 | 15-17 | 0.04 max | 0.04 max |
| Grade | Tensile (ksi) | .2% Yield (ksi) | Elongation % | Hardness (HRb) |
|---|---|---|---|---|
| C22 | 115 | 55 | 60 | 89 |
| C276 | 110 | 52.6 | 62 | - |
Hastelloy C22/C276 Buttweld Fittings are available in various types, each serving a specific function. For instance, tees are used to distribute and collect fluids running through the pipelines, while pipe bends allow for smooth direction changes. Similarly, 45-degree elbows are designed for a 45-degree change in direction.
Additionally, pipe caps are used to securely close the ends of pipelines. Other variations of buttweld fittings include crosses, pipe unions, couplings, threaded pipes, pipe bends, miter bends, and more.
These Hastelloy C22/C276 Buttweld Fittings are manufactured using processes like push, press, forge, and casting. After production, they undergo a series of rigorous tests and come with essential certifications, including raw material purity reports, third-party inspection certificates, radiography test results, flattening test certificates, and flaring test reports.
| STANDARD | UNS | WNR. | JIS | EN |
|---|---|---|---|---|
| Hastelloy C22 | N06022 | 2.4602 | NW 6022 | NiCr21Mo14W |
| Hastelloy C276 | N10276 | 2.4819 | NW 0276 | NiMo16Cr15W |
