Inconel 718 Lap Joint Flanges are forged precipitation-hardening nickel-chromium alloy flanges made from UNS N07718 / W.Nr. 2.4668 material, typically supplied to ASTM B637 (precipitation-hardenable forgings) material requirements and ASME B16.5 dimensional standards in pressure classes 150# – 1500#. Ragnar Metals & Tubes manufactures and exports these flanges with RF / FF facing options, EN 10204 3.1/3.2 documentation, and third-party inspection on request.
Ragnar Metals & Tubes is a 718 Lap Joint Flange Supplier and manufacturer of Inconel 718 (UNS N07718) lap joint flanges to ASTM B637 (precipitation-hardenable forgings) and applicable ASME flange dimensional standards, with common sizes and classes available from stock, subject to current inventory, for export and EPC orders.
A lap joint flange is used together with a separate stub end: the flange itself is not welded to the pipe and rotates freely over the stub end's flared back, so bolt holes can be aligned without rotating the pipe. Because the flange isn't welded to the process-wetted stub end, it can be a lower-cost material even when the piping itself is an expensive alloy, and it allows quick disassembly for inspection or cleaning — a useful option where the piping material and flange material differ.
Inconel 718 is a precipitation-hardening nickel-chromium alloy (UNS N07718) known for very high strength retained to roughly 700°C through age-hardening, alongside good corrosion resistance.
UNS Number
Grade
Flange Type
Standard
MTC
Inspection
Origin
Export
| Class | Standard | Typical Facing |
|---|---|---|
| 150 | ASME B16.5 | RF / FF / RTJ |
| 300 | ASME B16.5 | RF / FF / RTJ |
| 600 | ASME B16.5 | RF / RTJ |
| 900 | ASME B16.5 | RF / RTJ |
| 1500 | ASME B16.5 | RF / RTJ |
| 2500 | ASME B16.5 | RF / RTJ |
Not every class/size combination applies to every flange type. Pressure-temperature ratings must be selected against the applicable ASME rating tables and actual design conditions.
Send us your size, class and quantity — we'll come back with pricing and lead time.
The Middle East and Indian sub-continent are home to hundreds of metal suppliers ranging from small trading shops to large ISO-certified manufacturers. International buyers typically evaluate a supplier on quality compliance, production capability, export experience and pricing transparency before placing a bulk order.
Rotates freely over the stub end for easy bolt-hole alignment
No direct weld between the flange and the process fluid path
Simplifies frequent dismantling for inspection or cleaning
Can pair a lower-cost flange with an alloy stub end to reduce cost
Requires a matching stub end for installation
Manufactured from Inconel 718 (UNS N07718) for very high strength retained to roughly 700°C through age-hardening
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Inconel 718 Lap Joint Flange – Standard Class | UNS N07718 | General process piping | ASME B16.5 |
| Inconel 718 Lap Joint Flange – High Pressure | UNS N07718 | High-pressure / critical service | ASME B16.5 |
| Specification | Details |
|---|---|
| UNS Number | N07718 |
| Grade | 718 |
| Flange Type | Lap Joint Flange |
| Standard | ASTM B637 (precipitation-hardenable forgings) / ASME B16.5 |
| Werkstoff Number | 2.4668 |
| Pressure Class | 150# – 1500# |
| Facing | RF / FF |
| Size (mm) | Size (mm) |
|---|---|
| 15 | 20 |
| 25 | 32 |
| 40 | 50 |
| 65 | 80 |
| 100 | 125 |
| 150 | 200 |
| 250 | 300 |
| 350 | 400 |
| 450 | 500 |
| 600 |
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 50.0 – 55.0 |
| Chromium (Cr) | 17.0 – 21.0 |
| Niobium + Tantalum (Nb+Ta) | 4.75 – 5.50 |
| Molybdenum (Mo) | 2.80 – 3.30 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Iron (Fe) | Balance |
| Property | Value |
|---|---|
| Tensile Strength | 1240 MPa Min (aged) |
| Yield Strength (0.2%) | 1035 MPa Min (aged) |
| Elongation | 12% Min (aged) |
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.19 g/cm³ | 0.296 lb/in³ |
| Melting Point | 1260 – 1336 °C | 2300 – 2437 °F |
| Value (µΩ·m) | Temperature (°C) | Condition |
|---|---|---|
| 1.25 | 20 | Aged |
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| UNS | 2.4668 | N07718 |
| AMS / ASTM | AMS 5662 / B637 | N07718 |
| Common Trade Name | Inconel 718 | N07718 |
Forged Inconel 718 billets are pressed into flange blanks, solution treat + age to restore corrosion resistance and mechanical properties, then CNC-machined to the required class, bore and facing.
| Process | Temperature | Medium | Purpose |
|---|---|---|---|
| Solution Treat + Age | Solution ~980°C, Age ~720°C/620°C | Air Cool | Precipitate strengthening phases for high strength |
Not sure of every specification? Send your drawing, BOQ or existing part photo and our team can review the requirement.
1/2" – 24" NB · Forged, used with stub end
Frequent disassembly / mixed-material piping
Gas turbine and jet engine components
High-strength fasteners and flanges
Oil & gas high-pressure wellhead equipment
Cryogenic to elevated-temperature structural parts
Piping systems requiring frequent disassembly for inspection or cleaning
Applications pairing an alloy stub end with a lower-cost backing flange
| Property | Inconel 718 | Inconel X-750 |
|---|---|---|
| Alloy Family | Precipitation-Hardening Nickel-Chromium Alloy | Precipitation-Hardening Nickel-Chromium Alloy |
| UNS / Werkstoff | N07718 / 2.4668 | N07750 / 2.4669 |
Inconel 718 and X-750 are both age-hardenable; 718 generally offers higher room-temperature strength while X-750 is often preferred for springs and applications needing stress-relaxation resistance.
| Size | Price (USD) | Price (INR) |
|---|---|---|
| 1/2" – 2" NB, 150# | $35 – $80 / pc | ₹2,900 – ₹6,600 / pc |
| 4" – 8" NB, 300# | $150 – $500 / pc | ₹12,450 – ₹41,500 / pc |
| 10" – 24" NB, 600# | $700 – $3,200 / pc | ₹58,000 – ₹2,65,000 / pc |
Indicative only — actual price depends on size, class, quantity and market rates. Request current pricing above.
Common sizes and standard pressure classes may be available from stock, subject to current inventory. Non-standard sizes, higher pressure classes and project-specific inspection requirements are manufactured or sourced against confirmed orders. Contact us for current stock status and lead time.
MOQ: 25 – 100 Kg / pieces depending on grade, size and product form.
Payment: T/T (bank transfer), Letter of Credit (LC at sight or usance), and SWIFT transfer, depending on order value and buyer requirements.
All export orders are packed in seaworthy, fumigated wooden crates with waterproof inner lining, or palletised packing with clear shipping marks and heat-number identification for full traceability.
Container stuffing is supervised and loading photographs are shared on request, along with certificates of origin, mill test certificates and packing lists for smooth customs clearance at destination ports.
Every Inconel 718 Lap Joint Flange is checked for chemistry, tensile strength, hardness and dimensions before dispatch. PMI, radiography and third-party inspection (TUV, BV, SGS, Lloyd's) are available on request, with EN 10204 3.1/3.2 certification.
Documents listed are available on request; not every document applies to every order.
NPS / DN size
Pressure class
Quantity
Facing
Pipe schedule / bore
Material / standard requirement
MTC requirement
Third-party inspection requirement
Delivery location
Required delivery date
Don't know all the specifications? Send your drawing, BOQ or existing part photo and our team can review the requirement.
718 Lap Joint Flange Manufacturer — full mill traceability with every order
718 Lap Joint Flange Exporter — export documentation and seaworthy packing for every shipment
718 Lap Joint Flange Stockist — common classes and sizes available from stock, subject to inventory
718 Lap Joint Flange Distributor — dedicated support for EPC contractors and trading partners
20+ years exporting nickel and specialty alloy flanges
ISO certified quality systems
Inconel 718 sourced and tested to ASTM B637 (precipitation-hardenable forgings)
Mumbai, Delhi, Pune, Chennai, Hyderabad, Bengaluru, Ahmedabad, Rajkot, Coimbatore, Kolkata, Surat, Vadodara
For buyers searching for a 718 Lap Joint Flange in UAE, Ragnar Metals & Tubes is an India-based manufacturer and exporter supplying Inconel 718 Lap Joint Flanges to buyers and EPC contractors in the UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain, with export documentation and seaworthy packing for every shipment.
UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, USA, UK, Germany, South Africa, Australia, Malaysia
ISO 9001:2015
ISO 10002:2018
GST Registration
Udyam Registration
Before placing an order, confirm:
Don't know the exact specification yet? Send your BOQ or drawing and we'll confirm it with you.
Send us your size, class and quantity — we'll come back with pricing and lead time.
Browse: All Flanges
A lap joint flange is used together with a separate stub end: the flange itself is not welded to the pipe and rotates freely over the stub end's flared back, so bolt holes can be aligned without rotating the pipe.
150# – 1500# per ASME B16.5, depending on size and facing.
Yes, EN 10204 3.1 as standard; 3.2 third-party certification on request.
RF / FF.
Yes, we regularly export to the UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.
Yes, through TUV, BV, SGS or Lloyd's before dispatch.
The material is supplied to ASTM B637 (precipitation-hardenable forgings) (UNS N07718); dimensions follow the applicable ASME flange dimensional standard, including ASME B16.5 and, for larger sizes, ASME B16.47.
Size (NPS/DN), pressure class, facing, quantity, MTC and inspection requirements, and delivery location.
Yes, a sample Material Test Certificate can be shared on request to confirm our documentation format.
Yes — the lap joint flange is a loose backing ring; a matching stub end (welded into the pipeline) provides the process-wetted, gasket-sealing face.
Inconel 718 offers very high strength retained to roughly 700°C through age-hardening, alongside good corrosion resistance.
Yes — Inconel 718 Lap Joint Flanges in UNS N07718 are exactly what we manufacture and export; share your size, class and quantity and we'll quote directly.
