Hastelloy B-2 Socket Weld Flanges are forged nickel-molybdenum alloy flanges made from UNS N10665 / W.Nr. 2.4617 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 B-2 Socket Weld Flange Supplier and manufacturer of Hastelloy B-2 (UNS N10665) 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.
Hastelloy B-2 is a nickel-molybdenum alloy (UNS N10665) known for outstanding resistance to hydrochloric acid and other strongly reducing chemical environments across all concentrations and temperatures.
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 Hastelloy B-2 (UNS N10665) for outstanding resistance to hydrochloric acid and other strongly reducing chemical environments across all concentrations and temperatures
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Hastelloy B-2 Socket Weld Flange – Standard Class | UNS N10665 | General process piping | ASME B16.5 |
| Hastelloy B-2 Socket Weld Flange – High Pressure | UNS N10665 | High-pressure / critical service | ASME B16.5 |
| Specification | Details |
|---|---|
| UNS Number | N10665 |
| Grade | B-2 |
| Flange Type | Socket Weld Flange |
| Standard | ASTM B564 / ASME B16.5 |
| Werkstoff Number | 2.4617 |
| 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) | Balance |
| Molybdenum (Mo) | 26.0 – 30.0 |
| Iron (Fe) | 2.0 Max |
| Chromium (Cr) | 1.0 Max |
| Cobalt (Co) | 1.0 Max |
| Carbon (C) | 0.02 Max |
| Property | Value |
|---|---|
| Tensile Strength | 760 MPa Min (annealed) |
| Yield Strength (0.2%) | 350 MPa Min |
| Elongation | 40% Min |
| Property | Metric | Imperial |
|---|---|---|
| Density | 9.22 g/cm³ | 0.333 lb/in³ |
| Melting Point | 1330 – 1380 °C | 2425 – 2515 °F |
| Value (µΩ·m) | Temperature (°C) | Condition |
|---|---|---|
| 1.36 | 20 | Annealed |
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| UNS | 2.4617 | N10665 |
| ASTM / ASME | B564 / SB564 | N10665 |
| Common Trade Name | Hastelloy B-2 | N10665 |
Forged Hastelloy B-2 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 | 1065 – 1120°C | Rapid Water Quench | Avoid carbide/intermetallic precipitation, retain corrosion resistance |
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
Hydrochloric acid production and handling
Sulfuric acid service
Chemical processing under strongly reducing conditions
Pharmaceutical manufacturing
Small-bore, high-pressure piping systems
Instrumentation and utility lines
| Property | Hastelloy B-2 | Hastelloy B-3 |
|---|---|---|
| Alloy Family | Nickel-Molybdenum Alloy | Nickel-Molybdenum Alloy (Improved Thermal Stability) |
| UNS / Werkstoff | N10665 / 2.4617 | N10675 / 2.4600 |
Hastelloy B-3 offers improved thermal stability and fabricability over B-2 for the same core HCl resistance; B-2 remains widely specified for established applications.
| Size | Price (USD) | Price (INR) |
|---|---|---|
| 1/2" – 2" NB, 150# | $70 – $160 / pc | ₹5,800 – ₹13,300 / pc |
| 4" – 8" NB, 300# | $300 – $950 / pc | ₹24,900 – ₹78,850 / pc |
| 10" – 24" NB, 600# | $1,400 – $6,000 / pc | ₹1,16,000 – ₹4,98,000 / 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 Hastelloy B-2 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.
B-2 Socket Weld Flange Manufacturer — full mill traceability with every order
B-2 Socket Weld Flange Exporter — export documentation and seaworthy packing for every shipment
B-2 Socket Weld Flange Stockist — common classes and sizes available from stock, subject to inventory
B-2 Socket Weld Flange Distributor — dedicated support for EPC contractors and trading partners
20+ years exporting nickel and specialty alloy flanges
ISO certified quality systems
Hastelloy B-2 sourced and tested to ASTM B564
Mumbai, Delhi, Pune, Chennai, Hyderabad, Bengaluru, Ahmedabad, Rajkot, Coimbatore, Kolkata, Surat, Vadodara
For buyers searching for a B-2 Socket Weld Flange in UAE, Ragnar Metals & Tubes is an India-based manufacturer and exporter supplying Hastelloy B-2 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.
Browse: All Flanges
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 N10665); 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.
Hastelloy B-2 offers outstanding resistance to hydrochloric acid and other strongly reducing chemical environments across all concentrations and temperatures.
Yes — Hastelloy B-2 Socket Weld Flanges in UNS N10665 are exactly what we manufacture and export; share your size, class and quantity and we'll quote directly.
