ARK Stainless Inc is a manufacturer, supplier and exporter of Inconel Buttweld Fittings for high-temperature, high-pressure, and corrosion-resistant piping systems used in oil & gas, petrochemical, offshore, marine, aerospace, power generation, and chemical processing industries.
Our manufacturing range includes Inconel 600, Inconel 601, Inconel 625, and Inconel 718 Buttweld Elbows, Tees, Reducers, Caps, Stub Ends, and custom pipe fittings in seamless, welded, and fabricated construction.
These Inconel Pipe Fittings are manufactured according to ASTM B366 / ASME SB366, ASME B16.9, ASME B16.28, and MSS SP-43 standards for industrial process piping applications requiring resistance against oxidation, chloride exposure, pitting corrosion, and elevated temperature service conditions.
Inconel Buttweld Fittings are widely supplied for heat exchangers, offshore platforms, seawater systems, refinery piping, pressure vessels, gas processing plants, and thermal processing equipment operating in corrosive environments.
Available in multiple schedules, wall thicknesses, and custom project requirements with material test certificates, PMI testing, and third-party inspection support.
| 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% |
Inconel 600, 601, 625, and 718 Buttweld Fittings are supplied for high-temperature and corrosion-resistant piping systems used in offshore platforms, petrochemical plants, refineries, heat exchangers, marine applications, gas processing plants, and thermal processing equipment.
ARK Stainless Inc manufactures and supplies Inconel Buttweld Elbows, Tees, Reducers, Caps, and Stub Ends according to ASTM B366 / ASME SB366, ASME B16.9, ASME B16.28, and MSS SP-43 standards in seamless, welded, and fabricated construction.
These Inconel Pipe Fittings are widely used in process piping applications requiring resistance against oxidation, pitting corrosion, chloride exposure, and elevated temperature operating conditions.
Available in SCH 10, SCH 40, SCH 80, and custom wall thicknesses with multiple size options for industrial process piping systems and project supply requirements.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| Inconel 600 | 2.4816 | N06600 | NCF 600 | NA 13 | МÐЖМц 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 | Ð¥Ð75МБТЮ | NC22DNB4M | NiCr22Mo9Nb |
| Inconel 718 | 2.4668 | N07718 | - | - | - | - | - |
Incoloy 800 / 800HT / 825 Buttweld Fittings are supplied in Long Radius (LR), Short Radius (SR), and custom-radius configurations for industrial piping systems requiring high-temperature strength and corrosion resistance.
These fittings are commonly used in heat exchangers, chemical processing plants, refineries, offshore piping, and thermal processing equipment operating under elevated temperature conditions.
ARK Stainless Inc supplies Incoloy Buttweld Elbows, Tees, Reducers, Caps, and Stub Ends in seamless and welded construction according to ASTM B366 / ASME SB366 and ASME B16.9 standards.
All fittings are supplied with heat number traceability, material test certificates, and inspection support as per project requirements.
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ÐИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15(HT) | ÐИ670 | - | X8NiCrAlTi32-21 | XH32T |
| Incoloy 825 | 2.4858 | N08825 | NCF 825 | NA 16 | ÐП703 | NFE30C20DUM | NiCr21Mo | XH38BT |