ARK Stainless Inc. is a trusted name in the supply and manufacturing of high-performance Inconel Buttweld Fittings known for their exceptional strength, corrosion resistance, and reliability in high-temperature and high-pressure environments. These fittings are precisely engineered to withstand aggressive chemical exposure and thermal cycling in demanding applications.
We offer a wide range of grades including Inconel 600, 601, 625, and 718, each tailored to specific application requirements. Our Inconel buttweld fittings are manufactured in accordance with international specifications such as ASTM B366 / ASME SB366 and dimensional standards like ASME B16.9, B16.28, and MSS-SP-43, ensuring consistency and quality in every piece.
These fittings exhibit excellent resistance to oxidation, pitting, crevice corrosion, and stress corrosion cracking. With superior mechanical strength and thermal stability, Inconel buttweld fittings are widely used in petrochemical plants, refineries, aerospace, heat exchangers, marine, and automotive industries.
At ARK Stainless Inc., we ensure every Inconel fitting is produced using the finest raw materials and modern techniques, followed by strict quality testing to guarantee performance, longevity, and complete client satisfaction.
| Grade | Ni | Fe | Cr | Mo | Cu | Ti | Al | Mn | Si | C | S | Mb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inconel 600 | 72.00 min | 6.00 – 10.00 | 14.00 – 17.00 | - | 0.50 max | - | - | 1.00 max | 0.50 max | 0.15 max | 0.015 max | - |
| Inconel 601 | 58.0 – 63.0 | Balance | 21.0 – 25.0 | - | 1.0 max | - | - | 1.0 max | 0.5 max | 0.10 max | 0.015 max | - |
| Inconel 625 | 58.0 min | 5.0 max | 20.0 – 23.0 | - | - | - | - | 0.50 max | 0.50 max | 0.10 max | 0.015 max | - |
| Inconel 718 | 50.00 – 55.00 | - | 17.00 – 21.00 | - | 0.30 max | - | - | 0.35 max | 0.35 max | 0.08 max | 0.015 max | - |
| Incoloy 800 | 30 – 35 | 39.5 min | 19 – 23 | - | 0.75 max | 0.15 – 0.60 | 0.15 – 0.60 | 1.5 max | 1.0 max | 0.10 max | 0.015 max | - |
| Incoloy 800H | 30 – 35 | 39.5 min | 19 – 23 | - | 0.75 max | 0.15 – 0.60 | 0.15 – 0.60 | 1.5 max | 1.0 max | 0.05 – 0.10 | 0.015 max | - |
| Incoloy 825 | 38.0 – 46.0 | 22.0 min | 19.5 – 23.5 | - | 1.5 – 3.0 | 0.6 – 1.2 | 0.2 max | 1.0 max | 0.5 max | 0.05 max | 0.015 max | 2.5 – 3.5 |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Inconel 600 | 8.47 g/cm³ | 1413 °C (2580 °F) | Psi – 95,000 , MPa – 655 | Psi – 45,000 , MPa – 310 | 40% |
| Inconel 601 | 8.1 g/cm³ | 1411 °C (2571 °F) | Psi – 80,000 , MPa – 550 | Psi – 30,000 , MPa – 205 | 30% |
| Inconel 625 | 8.4 g/cm³ | 1350 °C (2460 °F) | Psi – 135,000 , MPa – 930 | Psi – 75,000 , MPa – 517 | 42.5% |
| Inconel 718 | 8.2 g/cm³ | 1350 °C (2460 °F) | Psi – 135,000 , MPa – 930 | Psi – 75,000 , MPa – 482 | 45% |
| Incoloy 800 / 800HT | - | - | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa – 205 | 30% |
| Incoloy 825 | - | - | Psi – 80,000 , MPa – 550 | Psi – 32,000 , MPa – 220 | 30% |
All the stocks of the product are been kept with great safety measures. And the features it has are about the dimension standards that are ASTM, ASME ANSI B16.9, B16.28, MSS-SP-43. So the specifications it carries are ASTM B 366 / ASME SB 366. Even the chemical composition it has is alloy 600, 601, etc. The Inconel 600/601/625/718 Pipe Fittings thickness is 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80, etc. Considering that it has various raw materials that helped to make this product more durable. Due to its high capacity in strength is what makes the buttweld fitting a desirable product for other construction industries.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| Inconel 600 | 2.4816 | N06600 | NCF 600 | NA 13 | МНЖМц 28-2,5-1,5 | NC15FE11M | NiCr15Fe |
| Inconel 601 | 2.4851 | N06601 | NCF 601 | NA 49 | XH60BT | NC23FeA | NiCr23Fe |
| Inconel 625 | 2.4856 | N06625 | NCF 625 | NA 21 | ХН75МБТЮ | NC22DNB4M | NiCr22Mo9Nb |
| Inconel 718 | 2.4668 | N07718 | - | - | - | - | - |
Incoloy 800/800HT/825 Buttweld Fittings offers you the option of the long radius(LR), short radius(SR) and 3R Elbows for various turn radius. Incoloy 800/800HT/825 Buttweld Fittings adds more strength to piping system by a continuous metal structure. In the automated welding process, Incoloy Buttweld fittings are preferred for its ease of preparation. To ensure high quality of Incoloy Pipe Fittings in the last stage of production they are individually wrapped by hand. Job information like (material, size, heat number) along with all delivered Buttweld Fittings is also printed.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ЭИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15(HT) | ЭИ670 | - | X8NiCrAlTi32-21 | XH32T |
| Incoloy 825 | 2.4858 | N08825 | NCF 825 | NA 16 | ЭП703 | NFE30C20DUM | NiCr21Mo | XH38BT |
