Monel K500 Buttweld Fittings Supplier, Manufacturer & Exporter

Monel K500 Buttweld Fittings

Monel K500 Buttweld Fittings Supplier, Manufacturer & Exporter

Solitaire Overseas is a reliable producer, distributor, and exporter of Monel K500 Buttweld Fittings (UNS N05500 WNR 2.4375) that is produced according to the ASTM B366 and ASME B16.9 requirements. We have Monel K500 Seamless Buttweld Fittings and UNS N05500 pipe fittings that form part of a complete product range which also incorporates Monel K500 Forged Fittings and Monel K500 Pipe Fittings which form a full system.


With the addition of aluminum and titanium, they have a construction of a nickel-copper alloy that has been hardened through precipitation and provides the highest tensile strength (140,000 psi min), the best seawater corrosion resistance, and non-magnetic conductivity, needed in offshore, marine, and cryogenic service. Seamless with 1/2 to 10 inch and welded with 1/2 to 48 inch available in any schedule, including Sch 5 to XXS, including elbows, tees, reducers and caps, stub ends and long- radius and short- radius pipe bends. Fittings are non-magnetic to - 200 o C and spark free, which is important in hazardous and offshore use. Solitaire Overseas complies with ISO 9001:2015 certification, MTC based on EN 10204 3.1/3.2, and third-party inspection which is optional.


Why Choose Solitaire Overseas for Monel K500 Seamless Buttweld Fittings?

  • ASTM B366 / ASME SB366 certified manufacturer with full heat and material traceability
  • ISO 9001:2015 quality management; MTC per EN 10204 3.1/3.2 with every shipment
  • Non-magnetic (down to -200°F) and spark-resistant for offshore/hazardous service
  • Precipitation-hardened for highest tensile strength in nickel-copper alloy fittings
  • Available seamless (½"–10") and welded (½"–48") in Sch 5 to XXS
  • Complete type range: elbows, tees, reducers, caps, stub ends, pipe bends (1D–10D)
  • Third-party inspection: TUV, SGS, Bureau Veritas, Intertek, Lloyd's Register
  • Competitive Monel K500 Buttweld Fittings price with global export capability



Specification of Monel 400 / K500 Buttweld Fittings

Specification Details
Specification ASTM B366 / ASME SB366
Standard EN, ISO, DIN, JIS, NPT
Dimension Standard ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Thickness SCH 10, SCH 20, SCH 30, STD (SCH 40), SCH 60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS (Available with NACE MR 01-75)
Size Range 1/8” NB to 48” NB (Seamless & 100% X-Ray Welded, Fabricated)
Bending Radius R = 1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Type Seamless / Welded / Fabricated
Pressure-Temperature Class 150LB, 300LB, 600LB, 1500LB, 2500LB
Schedule Schedule 5 to Schedule XXS
Dimension Types BS 1640, EN 10253-4, DIN 2605, JIS B2312, ANSI B16.9, MSS SP-75, ANSI B16.28, MSS-SP-43 Type A & B, JIS B2313

Ready Stock Available for Monel 400 / K500 Buttweld Fittings

Equivalent Grades of Monel 400 / K500 Buttweld Fittings

Grade WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
Monel 400 2.4360 N04400 NW 4400 NA 13 МНЖМц 28-2,5-1,5 NU-30M NiCu30Fe
Monel K500 2.4375 N05500 - - - - -

Chemical Composition of Monel 400 / K500 Buttweld Fittings

Grade Ni Fe C Mn Si Cu Al Ti S
400 63.00 min 2.50 max 0.30 max 2.00 max 0.50 max Remainder - - 0.024 max
K500 63.00 min 0.5 – 2.0 0.25 max 1.5 max 0.5 max 27.0 – 33.0 2.3 – 3.15 0.35 – 0.85 0.010 max

Mechanical Properties of Monel 400 / K500 Buttweld Fittings

Grade Density Melting Point Tensile Strength Yield Strength (0.2% Offset) Elongation
Monel 400 8.8 g/cm³ 1350°C (2460°F) 80,000 psi (550 MPa) 35,000 psi (240 MPa) 40%
Monel K500 8.44 g/cm³ 1350°C (2460°F) 160,000 psi (1100 MPa) 115,000 psi (790 MPa) 20%

Other Types of Monel 400 / K500 Buttweld Fittings

  • Monel 400 Barrel Nipple
  • UNS N04400 LR Return Bend
  • DIN 2.4360 SR Return Bend
  • ASTM B366 Monel 400 1D Elbow
  • Monel K500 1.5D Elbow
  • Monel 400 3D Elbow
  • Monel 400 5D Elbow
  • UNS N04400 Lateral Tee
  • DIN 2.4360 Exhaust Pipe Reducer

Size of Monel 400 / K500 Buttweld Fittings

Product Size* Wall Thickness** Seamless Welded
Elbow 1/2"–24" SCH10S–XXS
8"–104" SCH5S–80S/XS
Tee 1/2"–24" SCH10S–XXS
8"–104" SCH5S–80S/XS
Reducer 1/2"–24" SCH10S–XXS
8"–104" SCH5S–80S/XS
Cap 1/2"–80" SCH10S–SCH160
Lap Joint Stub End 1/2"–24" SCH5S–80S/XS
8"–80" SCH5S–80S/XS

Pressure Rating of Monel 400 / K500 Buttweld Fittings (Class 150)

Temperature (°F) Temperature (°C) Rating (psi)
-20 to 150 -29 to 66 300
200 93 265
250 121 225
300 149 185
350 177 150
400 204 -
450 232 -
500 260 -
550 288 -

Industrial Applications

  • Petrochemical Industries
  • Power Generation Industries
  • Food Processing Industries
  • Oil & Gas Industries
  • Sugar Industries

Key Features & Applications of UNS N05500 Buttweld Fittings

UNS N05500 Monel K500 Buttweld Fittings combine the very low corrosion in high-velocity in seawater with high tensile strength due to the precipitation hardening, and are used in the marine service where Monel 400 fittings are no longer strong enough. These fittings are non-magnetically operated, spark free and perform well in sour gas wells. Its applications are offshore platform piping, marine heat exchangers, pump parts, aerospace hydraulic systems, and chemical plant piping with high pressure and flow requirement that is resistant to chloride, acidic, and alkaline corrosion.

Monel K500 Buttweld Fittings – Price List (Request on Quote)

Product Type Size Range Price
Monel K500 Seamless Elbow 90° LR ½" – 10" Request on Quote
Monel K500 Welded Equal Tee ½" – 48" Request on Quote
Monel K500 Concentric Reducer ½" – 48" Request on Quote
Monel K500 Eccentric Reducer ½" – 48" Request on Quote
Monel K500 End Cap ½" – 48" Request on Quote
Monel K500 Stub End (Long) ½" – 24" Request on Quote

Frequently Asked Questions – Monel K500 Buttweld Fittings

ASTM B366 / ASME SB366 covers material. ANSI/ASME B16.9, B16.28, and MSS-SP-43 govern dimensions of Monel K500 Seamless Buttweld Fittings.

Yes. UNS N05500 Monel K500 Buttweld Fittings are non-magnetic down to -200°F (-129°C) and are spark-resistant for hazardous environments.

Seamless: ½" to 10"; Welded: ½" to 48". All schedules from Sch 5 to XXS are available from Solitaire Overseas.

Monel K500 offers ~3x higher tensile strength (140,000 psi) via precipitation hardening vs Monel 400, for demanding high-pressure marine service.

Pipe bends in 1.5D, 3D, 5D, and 10D radii are available in Monel K500 to ASME B16.9 / custom specifications.



Get a Quote for Monel K500 Buttweld Fittings

Looking for pricing on ASTM B366 Monel K500 Buttweld Fittings? Send us your type, size, schedule, and quantity—we'll get back with a quote and lead time within 24 hours. Stock available for quick dispatch.