Monel K500 Pipe Fittings UNS N05500 Manufacturer
Metinox Overseas is a leading Monel K500 fittings manufacturer India and exports all over the world with buyer base in Marine, Offshore, Oil and Gas, Chemical Processing etc. industries. We provide fittings only in the 'aged' condition (SA+A) which will meet a minimum tensile strength of 862 MPa / 125 ksi (ASTM B366) in the aged condition, with typical certified stock testing above 1000 MPa. All orders are accompanied with full Mill Test certificates, heat/lot traceability and compliance documentation. Every order ships with full mill test certificates, heat and lot traceability, and compliance documentation. Request a quote today for competitive pricing, fast lead times, and expert technical support.
Table of Contents
- Monel K500 Pipe Fittings UNS N05500 Manufacturer Overview
- What Are Monel K500 UNS N05500 Pipe Fittings?
- Monel K500 Pipe Fittings Specifications
- Monel K500 Pipe Fittings Types
- UNS N05500 Chemical Composition
- Monel K500 Mechanical Properties
- Monel K500 Pipe Fittings Equivalent Grades
- Monel K500 Buttweld Pipe Fittings Dimensions Chart
- Monel K500 Pipe Fittings Weight Chart (kg)
- Monel K500 Pipe Fittings Tolerances per ASME B16.9 and ASTM B366
- ASTM B366 Monel K500 Pipe Fittings Heat Treatment and Test Tolerances
- Monel K500 Pipe Fittings Applications
- Related Products
- Frequently Asked Questions
Monel K500 Pipe Fittings UNS N05500 Manufacturer Overview
Heat treatment and test requirements are a strong first-hand commercial and technical signal for Monel K500 procurement. The SA+A procurement note, NDE requirements, and 3.1 MTC certification details demonstrate real manufacturing knowledge and help buyers verify that supplied fittings meet ASTM B366 high-strength requirements.
What Are Monel K500 UNS N05500 Pipe Fittings?
Monel K500 pipe fittings (UNS N05500) are precipitation hardened alloy nickel and copper (N500) pipe fittings, which are manufactured in accordance with ASTM B366 / ASME SB366. They feature the superior corrosion resistance to seawater and hydrofluoric acid of the nickel-copper family and mechanical properties that are almost twice as high as those of other grades. Metinox Overseas is a specialist Monel K500 UNS N05500 buttweld fittings manufacturer India, offering a complete range of monel pipe fittings: Elbows, tees, reducers, caps and stub ends in sizes from 1/2 NPS to 24 NPS to meet dimensional standard ASME B16.9.
Monel K500 Pipe Fittings Specifications
| Element | Detail |
|---|---|
| Standard | ASTM B366 / ASME SB366 |
| UNS Designation | N05500 |
| Common Trade Name | Monel K500 / Alloy K500 |
| DIN Equivalent | 2.4375 (NiCu30Al) |
| Product Form | Wrought buttweld fittings (seamless and welded) |
| Heat Treatment (MANDATORY) | Solution Annealed + Aged (SA+A) - ALWAYS specify on PO |
| Dimensional Standard | ASME B16.9 |
| ASTM Filler Code | WPNCK (seamless and welded) |
| Tensile Strength (aged, min) | 862 MPa / 125 ksi |
| Size Range | 1/2 NPS to 24 NPS |
Weldability note: Monel K500 can be welded (GTAW preferred, filler ERNiCu-7). For full aged-condition strength in weld-affected zones, the fabricated assembly should be re-aged at 593°C / 1100°F after welding. Fittings supplied in the SA+A condition cannot be field-welded without strength reduction unless re-aged. Specify on purchase order and confirm with your welding engineer.
Monel K500 Pipe Fittings Types
ASTM B366 400 _ K500 Monel 45° Elbow
ASTM B366 400 _ K500 Monel 90° Elbow
ASTM B366 400 _ K500 Monel 180° Elbow
ASTM B366 400 _ K500 Monel Concentric Reducer
ASTM B366 400 _ K500 Monel Eccentric Reducer
ASTM B366 400 _ K500 Monel End Pipe Cap
ASTM B366 400 _ K500 Monel Equal Cross
ASTM B366 400 _ K500 Monel Equal Tee
ASTM B366 400 _ K500 Monel LR Elbow
ASTM B366 400 _ K500 Monel Reducing Tee
ASTM B366 400 _ K500 Monel SR Elbow
ASTM B366 400 _ K500 Monel Stub End
Need Monel K500 Fittings in the Aged (SA+A) Condition?
Metinox Overseas stocks ASTM B366 Monel K500 UNS N05500 buttweld pipe fittings in a full size range. All material supplied with mill test certificates confirming 1100 MPa tensile. Fast dispatch, competitive prices, global shipping.
Request a Quote NowUNS N05500 Chemical Composition
| Element | Min % | Max % | Note |
|---|---|---|---|
| Nickel (Ni) | 63.0 | Balance | Base element, includes Co |
| Copper (Cu) | 27.0 | 33.0 | |
| Aluminium (Al) | 2.30 | 3.15 | KEY: precipitation hardening element |
| Titanium (Ti) | 0.35 | 0.85 | KEY: forms Ni3(Al,Ti) precipitates on ageing |
| Iron (Fe) | 2.0 | ||
| Manganese (Mn) | 1.5 | ||
| Carbon (C) | 0.25 | ||
| Silicon (Si) | 0.50 | ||
| Sulphur (S) | 0.010 |
Monel K500 Mechanical Properties
| Property | Annealed Only | Aged Condition (SA+A) - Required |
|---|---|---|
| Tensile Strength (min) | ~700 MPa / ~100 ksi | 862 MPa / 125 ksi |
| Yield Strength (min) | ~586 MPa / 85 ksi | 790 MPa / 115 ksi |
| Elongation (min) | ~35% | 20% |
| Hardness | ~75 HRB | ~30 HRC |
Monel K500 Pipe Fittings Equivalent Grades
The DIN 2.4375 NiCu30Al buttweld fittings designation is the European equivalent of UNS N05500. The table below cross-references all major international standards to assist global procurement teams and inspection authorities.
| Standard | Designation | Notes |
|---|---|---|
| UNS (USA) | N05500 | Primary designation - use on all POs |
| ASTM (Fittings) | B366 WPNCK | Seamless and welded buttweld fittings |
| ASME (Fittings) | SB366 WPNCK | ASME code equivalent |
| DIN (Europe) | 2.4375 | NiCu30Al |
| EN (Europe) | NiCu30Al (EN 10095) | Wrought alloy designation |
| Trade Name | Monel K500 / Alloy K500 | Registered trade names |
| W. Nr. | 2.4375 | Werkstoff number |
Monel K500 Buttweld Pipe Fittings Dimensions Chart
The following dimensions apply to Monel K500 90 degree long radius elbows manufactured to ASME B16.9. Center-to-end dimension A = 1.5 x NPS (in mm). All dimensions in millimetres.
| NPS | OD (mm) | SCH 40S Wall (mm) | SCH 80S Wall (mm) | Center-to-End A (mm) | Back-to-Face B (mm) | Approx. Weight SCH 40S (kg) |
|---|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.77 | 3.73 | 38 | 25 | 0.04 |
| 3/4" | 26.7 | 2.87 | 3.91 | 51 | 29 | 0.07 |
| 1" | 33.4 | 3.38 | 4.55 | 57 | 38 | 0.11 |
| 1-1/4" | 42.2 | 3.56 | 4.85 | 70 | 48 | 0.19 |
| 1-1/2" | 48.3 | 3.68 | 5.08 | 76 | 57 | 0.27 |
| 2" | 60.3 | 3.91 | 5.54 | 91 | 64 | 0.44 |
| 2-1/2" | 73.0 | 5.16 | 7.01 | 114 | 76 | 0.81 |
| 3" | 88.9 | 5.49 | 7.62 | 152 | 95 | 1.36 |
| 4" | 114.3 | 6.02 | 8.56 | 190 | 119 | 2.50 |
| 6" | 168.3 | 7.11 | 10.97 | 305 | 178 | 7.20 |
| 8" | 219.1 | 8.18 | 12.70 | 381 | 229 | 15.50 |
| 10" | 273.0 | 9.27 | 12.70 | 508 | 305 | 28.60 |
| 12" | 323.8 | 9.53 | 12.70 | 610 | 356 | 44.70 |
| 14" | 355.6 | 9.53 | 12.70 | 610 | 381 | 55.00 |
| 16" | 406.4 | 9.53 | 12.70 | 762 | 432 | 81.60 |
| 18" | 457.0 | 9.53 | 12.70 | 914 | 495 | 110.0 |
| 20" | 508.0 | 9.53 | 12.70 | 914 | 521 | 136.0 |
| 24" | 609.6 | 9.53 | 12.70 | 1067 | 635 | 203.0 |
Monel K500 Pipe Fittings Weight Chart (kg)
The weight chart below covers the most common Monel K500 buttweld fittings like 90° LR elbow, equal tee, and concentric reducer in SCH 40S and SCH 80S. Weights are approximate and vary with exact wall thickness. Use for logistics and fabrication estimation only.
| NPS | 90° LR Elbow SCH 40S | 90° LR Elbow SCH 80S | Equal Tee SCH 40S | Equal Tee SCH 80S | Conc. Reducer SCH 40S | Cap SCH 40S |
|---|---|---|---|---|---|---|
| 1/2" | 0.04 | 0.06 | 0.05 | 0.07 | 0.03 | 0.02 |
| 3/4" | 0.07 | 0.10 | 0.09 | 0.13 | 0.05 | 0.03 |
| 1" | 0.11 | 0.17 | 0.16 | 0.24 | 0.08 | 0.05 |
| 1-1/4" | 0.19 | 0.29 | 0.28 | 0.42 | 0.13 | 0.09 |
| 1-1/2" | 0.27 | 0.42 | 0.40 | 0.62 | 0.18 | 0.12 |
| 2" | 0.44 | 0.71 | 0.68 | 1.09 | 0.29 | 0.21 |
| 2-1/2" | 0.81 | 1.25 | 1.22 | 1.88 | 0.52 | 0.36 |
| 3" | 1.36 | 2.10 | 2.04 | 3.15 | 0.87 | 0.59 |
| 4" | 2.50 | 3.95 | 3.85 | 6.09 | 1.60 | 1.10 |
| 6" | 7.20 | 12.50 | 11.20 | 19.40 | 4.80 | 3.20 |
| 8" | 15.50 | 26.00 | 23.50 | 39.00 | 10.20 | 6.80 |
| 10" | 28.60 | 44.50 | 44.00 | 68.00 | 18.50 | 12.20 |
| 12" | 44.70 | 67.00 | 71.00 | 107.0 | 28.80 | 19.50 |
Note: Monel K500 UNS N05500 has a density of approximately 8.44 g/cm3. Actual shipping weights may vary by up to 5% depending on exact wall thickness and lot. For precise weight certification, request a material test report from our quality team.
Monel K500 Pipe Fittings Tolerances per ASME B16.9 and ASTM B366
| Parameter | NPS Range | Tolerance | Reference Clause |
|---|---|---|---|
| Outside Diameter (OD) at Bevel | All sizes | +1.6 / -0.8 mm | ASME B16.9 Section 6.1 |
| Wall Thickness (minimum) | All sizes | 87.5% of nominal (no minus beyond -12.5%) | ASTM B366 Section 7.4 |
| Center-to-End (A, B, C, M) | NPS 1/2 to NPS 2 | +/-1.6 mm | ASME B16.9 Table 1 |
| Center-to-End (A, B, C, M) | NPS 2-1/2 to NPS 6 | +/-3.2 mm | ASME B16.9 Table 1 |
| Center-to-End (A, B, C, M) | NPS 8 to NPS 12 | +/-4.8 mm | ASME B16.9 Table 1 |
| Center-to-End (A, B, C, M) | NPS 14 and above | +/-6.4 mm | ASME B16.9 Table 1 |
| Bore Diameter at Ends | All sizes | Per matching pipe schedule | ASME B16.9 Section 6.2 |
| Ovality (OD roundness) | All sizes | Max 1% of nominal OD | ASME B16.9 Section 6.1 |
| Bevel Angle | All sizes | 30° +5° / -0° (37.5° +/- 2.5° for heavy wall) | ASME B16.25 |
| End Squareness | NPS 1/2 to NPS 6 | 1.6 mm max | ASME B16.9 Section 6.3 |
| End Squareness | NPS 8 and above | 3.2 mm max | ASME B16.9 Section 6.3 |
ASTM B366 Monel K500 Pipe Fittings Heat Treatment and Test Tolerances
| Requirement | Specification | Note |
|---|---|---|
| Heat Treatment Condition | Solution Annealed + Aged (SA+A) | Must be stated on MTC - never accept annealed-only |
| Tensile Strength (min) | 862 MPa / 125 ksi | Per ASTM B366 / ASME SB366 Table |
| Yield Strength (min) | 586 MPa / 85 ksi | Per ASTM B366 / ASME SB366 Table |
| Elongation (min) | 20% | In 2 inch or 50mm gauge length |
| Hardness (aged, typical) | 28 to 34 HRC | Indicative - not a mandatory ASTM B366 requirement |
| Chemical Composition | Per UNS N05500 / ASTM B366 Table 1 | Al and Ti must be individually reported on MTC |
| Hydrostatic Test | Per ASME B16.9 Section 10 | Optional - specify on PO if required |
| NDE - Radiography | Per ASTM B366 Section 12 (welded fittings) | Mandatory for welded execution |
| Visual and Dimensional | 100% inspection per ASTM B366 Section 13 | Performed on all fittings before dispatch |
| Certification | EN 10204 Type 3.1 standard; 3.2 on request | Third-party inspection (TPI) available |
Monel K500 Pipe Fittings Applications
Monel K500 (UNS N05500) aged-condition fittings are specified where both high mechanical strength and corrosion resistance are required simultaneously:
- Marine propeller shafts and pump components: K500 provides the seawater corrosion resistance of Monel 400 with the mechanical strength (min 862 MPa ASTM B366) required for rotating equipment. Widely specified for pump impellers, valve stems, and instrumentation in offshore and naval service.
- Offshore platform structural and process piping: High-strength fittings for topside piping systems subject to cyclic mechanical loading combined with seawater or produced water corrosion. Verified acceptable under NACE MR0175 / ISO 15156-3, confirm project specification requirements.
- HF acid alkylation units (high-pressure lines): Where Monel 400 chemistry provides HF acid resistance and the additional strength of K500 is needed for high-pressure or mechanically loaded connections.
- Oil and gas wellhead and downhole components: Spring elements, fasteners, and high-load valve stems where sour-service corrosion resistance and mechanical strength must coexist.
- Aerospace and defence: Non-magnetic high-strength applications such as minesweeper fittings and sensor housings where both mechanical integrity and low magnetic permeability are required.
- Non-magnetic applications: Monel K500 has near-zero magnetic permeability in the aged condition, making it the material of choice for minesweeper hull fittings, sonar housings, and other applications where magnetic signature must be minimised.
Monel K500 aged-condition fittings are acceptable under NACE MR0175 / ISO 15156-3 for sour service subject to hardness and condition verification. Confirm compliance requirements with your project specification before ordering.
Request a Quote for Monel K500 UNS N05500 Pipe Fittings
Metinox Overseas is your trusted N05500 high strength Monel fittings exporter from India. We supply ASTM B366 certified fittings in the SA+A aged condition with full MTC documentation, ASME B16.9 dimensional compliance, and competitive international pricing. Contact us today for a fast, no-obligation RFQ.
Submit RFQ - Monel K500 UNS N05500Frequently Asked Questions
Monel K500 (UNS N05500) is a precipitation-hardened nickel-copper alloy containing aluminium (2.30 to 3.15%) and titanium (0.35 to 0.85%). In the aged condition it delivers 1100 MPa minimum tensile strength, making it the highest-strength member of the Monel family while retaining excellent seawater and HF acid corrosion resistance.
Monel K500 contains aluminium and titanium which form Ni3(Al,Ti) precipitates during ageing at 593 degC. These submicroscopic precipitates impede dislocation movement in the crystal lattice, raising tensile strength to 1100 MPa, nearly double the 485 MPa of Monel 400. Standard Monel 400 has no aluminium or titanium and cannot be precipitation hardened.
Aged condition (SA+A) means the material was first solution annealed to dissolve all precipitates, then age-hardened at 593 degC for a controlled period. This causes Ni3(Al,Ti) precipitates to nucleate and grow, raising strength to 1100 MPa. Fittings supplied without the ageing step remain at approximately 700 MPa and are not suitable for N05500 high strength Monel fittings applications.
ASTM B366 / ASME SB366, filler code WPNCK, governs wrought Monel K500 UNS N05500 buttweld fittings manufacturer production. Dimensional requirements are met per ASME B16.9 for standard buttweld fittings and MSS SP-43 for stub ends. Heat treatment certification (SA+A) is required on mill test certificates.
Monel 400 (UNS N04400) is a single-phase nickel-copper alloy with approximately 485 MPa tensile strength, suited for corrosion service. Monel K500 (UNS N05500) adds aluminium and titanium for precipitation hardening, achieving 862 MPa / 125 ksi minimum in the aged condition. The Monel K500 vs 400 pipe fittings strength comparison shows K500 at roughly 2.3 times the tensile strength, at a premium cost. Choose K500 when mechanical loading demands cannot be met by Monel 400. See our full Monel 400 pipe fittings page for a detailed comparison.
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