ARK Stainless Inc. is a leading manufacturer and supplier of high-quality Hastelloy Buttweld Fittings, engineered to perform exceptionally well under high pressure, stress, and corrosive conditions. These fittings are known for their leak-proof construction and robust performance, making them ideal for a wide variety of demanding industrial applications including fluid and gas distribution systems.
We offer premium grades such as Hastelloy C22 and Hastelloy C276, which are widely appreciated for their excellent resistance to oxidation, rust, and aggressive chemicals. These alloys provide moderate tensile and yield strength, a high melting point of up to 1443°C (2430°F), and an elongation capacity of up to 30%. Available in various forms including Seamless, ERW, Welded, and Fabricated, our Hastelloy buttweld fittings are manufactured as per international standards like ASTM B366 / ASME SB366 and dimensional norms such as ASME B16.9, B16.28, and MSS-SP-43, ensuring superior quality and performance in critical industries such as petrochemicals, nuclear power, acid processing, and oil refineries.
| Grade | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr | W | V |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C22 | Balance | 0.010 max | 12.5-14.5 | 0.50 max | 0.08 max | 2-6 | 0.02 max | 0.02 max | 2.5 max | 20-22.5 | 2.5-3.5 | 0.35 max |
| Hastelloy C276 | Balance | 0.01 max | 15–17 | 1.0 max | 0.08 max | 4–7 | 0.04 max | 0.03 max | 2.5 max | 14.5–16.5 | 3–4.5 | 0.35 max |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|---|
| Hastelloy C22 | 8.69 g/cm3 | 1399 °C (2550 °F) | Psi – 1,00,000, MPa – 690 | Psi – 45000, MPa – 310 | 45 % |
| Hastelloy C276 | 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 1,15,000 , MPa – 790 | Psi – 52,000 , MPa – 355 | 40 % |
They are available in different types based on the shapes and their related functions. Like tees are used for the distribution and collection of fluids i.e. running through the pipelines. The pipe bends are used for smooth change in the direction of pipelines. On the other hand, 45-degree elbows are also used to change the direction but by only 45-degree angle
Likewise, the pipe caps are there for making the end of the pipeline covered and secure. In this way, there are many other types of buttweld fittings like crosses, pipe unions, pipe coupling, threaded pipes, pipe bends, miter bends, and many more.
Hastelloy c22/C276 Buttweld Fittings are produced via the process of push, press, forge, and cast. Then they ought to present forth some significant certificates like 100 % raw material purity, third party inspection reports certificates, 100% radiography test reports, flattening test certificates, flaring test report, etc.
| STANDARD | UNS | WNR. | EN | JIS | GOST | OR |
|---|---|---|---|---|---|---|
| Hastelloy C22 | N06022 | 2.4602 | NiCr21Mo14W | NW 6022 | - | - |
| Hastelloy C276 | N10276 | 2.4819 | NiMo16Cr15W | NW 0276 | ХН65МВУ | ЭП760 |
