Incoloy 800HT Socket Weld Flanges are forged nickel-iron-chromium alloy (enhanced creep strength) flanges made from UNS N08811 / W.Nr. 1.4959 material, typically supplied to ASTM B564 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 800HT Socket Weld Flange Supplier and manufacturer of Incoloy 800HT (UNS N08811) socket weld flanges to ASTM B564 and applicable ASME flange dimensional standards, with common sizes and classes available from stock, subject to current inventory, for export and EPC orders.
A socket weld flange has a recessed socket bore into which the pipe end is inserted before a single fillet weld is applied around the outside, most commonly used on smaller-bore, high-pressure lines. The smooth internal bore of a socket weld joint offers good flow characteristics with less turbulence than a threaded connection, though a small gap is normally left at the base of the socket per code requirements, and the design is generally avoided in severe cyclic or thermal service due to crevice-corrosion risk at that gap.
Incoloy 800HT is a nickel-iron-chromium alloy (enhanced creep strength) (UNS N08811) known for a tightened aluminum-plus-titanium range versus 800/800H for the best creep and stress-rupture strength in the family at sustained high temperature.
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.
Recessed socket bore for pipe insertion
Single fillet weld, no internal weld bead protruding into the bore
Smooth bore reduces flow turbulence versus threaded types
Typically limited to smaller nominal bore sizes
Common in high-pressure instrumentation and utility piping
Manufactured from Incoloy 800HT (UNS N08811) for a tightened aluminum-plus-titanium range versus 800/800H for the best creep and stress-rupture strength in the family at sustained high temperature
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Incoloy 800HT Socket Weld Flange – Standard Class | UNS N08811 | General process piping | ASME B16.5 |
| Incoloy 800HT Socket Weld Flange – High Pressure | UNS N08811 | High-pressure / critical service | ASME B16.5 |
| Specification | Details |
|---|---|
| UNS Number | N08811 |
| Grade | 800HT |
| Flange Type | Socket Weld Flange |
| Standard | ASTM B564 / ASME B16.5 |
| Werkstoff Number | 1.4959 |
| 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) | 30.0 – 35.0 |
| Chromium (Cr) | 19.0 – 23.0 |
| Iron (Fe) | 39.5 Min |
| Aluminum + Titanium (Al+Ti) | 0.85 – 1.20 |
| Carbon (C) | 0.06 – 0.10 |
| Property | Value |
|---|---|
| Tensile Strength | 450 MPa Min (annealed) |
| Yield Strength (0.2%) | 170 MPa Min |
| Elongation | 30% Min |
| Grain Size | ASTM No. 5 or coarser |
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.94 g/cm³ | 0.287 lb/in³ |
| Melting Point | 1357 – 1385 °C | 2475 – 2525 °F |
| Value (µΩ·m) | Temperature (°C) | Condition |
|---|---|---|
| 0.99 | 20 | Annealed |
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| UNS | 1.4959 | N08811 |
| ASTM / ASME | B564 / SB564 | N08811 |
| Common Trade Name | Incoloy 800HT | N08811 |
Forged Incoloy 800HT billets are pressed into flange blanks, solution annealing to restore corrosion resistance and mechanical properties, then CNC-machined to the required class, bore and facing.
| Process | Temperature | Medium | Purpose |
|---|---|---|---|
| Solution Annealing | 1149°C Min | Air or Water Quench | Develop controlled grain size and Al+Ti response for maximum creep strength |
Not sure of every specification? Send your drawing, BOQ or existing part photo and our team can review the requirement.
1/2" – 4" NB · Forged, RF facing
Small-bore high-pressure piping
High-temperature furnace and reformer components under sustained load
Ethylene cracking furnace hardware
Radiant tube supports
Heat-treatment fixtures under continuous high-temperature service
Small-bore, high-pressure piping systems
Instrumentation and utility lines
| Property | Incoloy 800HT | Incoloy 800H |
|---|---|---|
| Alloy Family | Nickel-Iron-Chromium Alloy (Enhanced Creep Strength) | Nickel-Iron-Chromium Alloy (Controlled Carbon/Grain Size) |
| UNS / Werkstoff | N08811 / 1.4959 | N08810 / 1.4958 |
800HT's tighter Al+Ti range gives it an edge in creep-rupture strength over 800H; 800H is generally the more economical choice when the extra margin isn't required.
| Size | Price (USD) | Price (INR) |
|---|---|---|
| 1/2" – 2" NB, 150# | $18 – $40 / pc | ₹1,500 – ₹3,300 / pc |
| 4" – 8" NB, 300# | $70 – $250 / pc | ₹5,800 – ₹20,750 / pc |
| 10" – 24" NB, 600# | $350 – $1,600 / pc | ₹29,000 – ₹1,33,000 / 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 Incoloy 800HT Socket Weld 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.
800HT Socket Weld Flange Manufacturer — full mill traceability with every order
800HT Socket Weld Flange Exporter — export documentation and seaworthy packing for every shipment
800HT Socket Weld Flange Stockist — common classes and sizes available from stock, subject to inventory
800HT Socket Weld Flange Distributor — dedicated support for EPC contractors and trading partners
20+ years exporting nickel and specialty alloy flanges
ISO certified quality systems
Incoloy 800HT sourced and tested to ASTM B564
Mumbai, Delhi, Pune, Chennai, Hyderabad, Bengaluru, Ahmedabad, Rajkot, Coimbatore, Kolkata, Surat, Vadodara
For buyers searching for a 800HT Socket Weld Flange in UAE, Ragnar Metals & Tubes is an India-based manufacturer and exporter supplying Incoloy 800HT Socket Weld 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.
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A socket weld flange has a recessed socket bore into which the pipe end is inserted before a single fillet weld is applied around the outside, most commonly used on smaller-bore, high-pressure lines.
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 B564 (UNS N08811); 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.
Socket weld flanges are most commonly used on smaller nominal bore sizes, typically up to about 4 inch NB, on higher-pressure-class lines.
Incoloy 800HT offers a tightened aluminum-plus-titanium range versus 800/800H for the best creep and stress-rupture strength in the family at sustained high temperature.
Yes — Incoloy 800HT Socket Weld Flanges in UNS N08811 are exactly what we manufacture and export; share your size, class and quantity and we'll quote directly.
