Monel K500 Expander FlangeASTM B865 · ASME B16.5 (flange end) · Manufacturer, stockist & exporter, India
Alloy K-500 · UNS N05500 · EXP
A Monel K500 expander flange is a weld neck flange whose hub increases the pipe size, made from Monel K500 to ASTM B865. Expander flanges step up the line size at a pump or valve outlet, replacing a reducer and a standard weld neck flange with one part.
- ASTM B865
- ASME B16.5 (flange end)
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Monel K500 Expander Flange?
- What it is
- A weld neck flange whose hub increases the pipe size
- Material
- ASTM B865
- Dimensions
- ASME B16.5 (flange end)
- Grade
- Monel K500 · UNS N05500
- Best at
- High-strength pump shafts, bolting and springs in seawater
Monel K500 Expander Flange Specification
| Product | Monel K500 Expander Flange |
|---|---|
| Material standard | ASTM B865 |
| Dimensional standard | ASME B16.5 (flange end) |
| Sizes | ½" – 24" (ASME B16.5) · 26" – 60" (ASME B16.47) |
| Pressure class | Class 150, 300, 400, 600, 900, 1500, 2500 · PN 6 – PN 100 |
| Facing | RF · FF · RTJ · tongue & groove |
| Bore | To match pipe schedule (state on order) |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose an Expander Flange
Expander flanges step up the line size at a pump or valve outlet, replacing a reducer and a standard weld neck flange with one part.
- Increases one or two pipe sizes
- Saves a weld and space
- Weld neck design
Monel K500 Expander Flange Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 63.0 min |
| Copper | 27.0 – 33.0 |
| Aluminium | 2.30 – 3.15 |
| Titanium | 0.35 – 0.85 |
| Iron | 2.0 max |
| Manganese | 1.5 max |
| Carbon | 0.25 max |
| Silicon | 0.5 max |
Monel K500 Expander Flange Mechanical Properties
| Age-hardened bar | Value |
|---|---|
| Tensile strength | 965 MPa · 140 ksi |
| Yield strength 0.2% | 690 MPa · 100 ksi |
| Elongation | 20% |
Full chemistry, properties and equivalents are on the Monel K500 grade page.
Other Monel K500 flanges
Monel K500 Expander Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiMonel K500 Expander Flange — questions buyers ask
When is an expander flange used?
Most often at pump and valve outlets where the line size increases immediately.
Which standard covers Monel K500 expander flanges?
The material is ASTM B865; dimensions follow ASME B16.5 (flange end). Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Monel K500 expander flange?
The alloy price, the size and pressure class, quantity, and the testing and documents required. Send your list and we quote the same working day.
Can you supply Monel K500 expander flanges to NACE MR0175?
Yes. Monel K500 is listed in NACE MR0175 / ISO 15156-3 within its limits; state NACE compliance on the order and it is confirmed on the certificate.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026