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Inconel 600, 601, 625 & 718 Buttweld Elbows, Tees, Reducers & Caps

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.

Chemical Composition of Inconel & Incoloy Alloy Seamless and Welded Pipe Fittings

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

Mechanical Properties of SS Seamless and Welded Buttweld Fittings

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 / 718 Buttweld Fittings

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.

Inconel 600 / 601 / 625 / 718 Buttweld Fittings

  • Suitable for high-temperature piping systems
  • Good resistance against oxidation and corrosion
  • Seamless and welded construction available
  • Manufactured according to ASTM and ASME standards
  • Suitable for refinery and offshore applications
  • Available in multiple schedules and thicknesses
  • PMI testing and inspection support available

600/601/625/718 Inconel ASTM B366 Buttweld Fittings Equivalent Grades
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 - - - - -

Specification of Inconel Alloy Buttweld Fittings
  • Specifications: ASTM B366 / ASME SB366
  • Dimensions: ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS1560, BS10, ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799
  • Size: Seamless Butt Weld Fittings: 1/2" - 10" | Welded Butt Weld Fittings: 1/2" - 48"
  • Schedule: SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS (Available with NACE MR 01-75)
  • Bending Radius: R = 1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
  • Type: Seamless / ERW / Welded / Fabricated
  • Thickness: 20 Swg, 18 Swg, 16 Swg, 14 Swg, 12 Swg, 10 Swg, & Sch. 10, Sch. 40, Sch. 80 etc.

Incoloy 800 / 800HT / 825 Buttweld Fittings

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.


800/800HT/825 Incoloy ASTM B366 Buttweld Fittings Equivalent Grades
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

Specification of Incoloy Alloy Buttweld Fittings
  • Specifications: ASTM B366 / ASME SB366
  • Dimensions: ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS1560, BS10, ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799
  • Size:
    • Seamless Butt Weld Fittings: 1/2" - 10"
    • Welded Butt Weld Fittings: 1/2" - 48"
  • Schedule:
    • SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS
    • Available with NACE MR 01-75
  • Bending Radius: R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
  • Type: Seamless / ERW / Welded / Fabricated
  • Thickness: 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc.