Inconel 600 Socket Weld FlangeASTM B564 · ASME B16.5 · Manufacturer, stockist & exporter, India
Alloy 600 · UNS N06600 · SWRF
An Inconel 600 socket weld flange is a flange with a counterbore socket into which the pipe is inserted and fillet-welded, made from Inconel 600 to ASTM B564. Socket weld flanges suit small-bore, high-pressure lines, usually 2" and under. A 1.6 mm (1/16") expansion gap is left at the bottom of the socket before welding.
- ASTM B564
- ASME B16.5
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an Inconel 600 Socket Weld Flange?
- What it is
- A flange with a counterbore socket into which the pipe is inserted and fillet-welded
- Material
- ASTM B564
- Dimensions
- ASME B16.5
- Grade
- Inconel 600 · UNS N06600
- Best at
- High-temperature oxidation, caustic and nuclear service
Inconel 600 Socket Weld Flange Specification
| Product | Inconel 600 Socket Weld Flange |
|---|---|
| Material standard | ASTM B564 |
| Dimensional standard | ASME B16.5 |
| 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 a Socket Weld Flange
Socket weld flanges suit small-bore, high-pressure lines, usually 2" and under. A 1.6 mm (1/16") expansion gap is left at the bottom of the socket before welding.
- Leave a 1.6 mm gap before welding
- Not recommended where crevice corrosion is a concern
- Bore to match pipe schedule
More on choosing: Socket weld flange guide.
Inconel 600 Socket Weld Flange: Why 600 for socket weld flanges
Socket weld flanges suit small-bore, high-pressure lines, usually 2" and under. A 1.6 mm (1/16") expansion gap is left at the bottom of the socket before welding. In Inconel 600, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy flanges are used where acids, chlorides or heat defeat stainless. Inconel 600 is picked for high-temperature oxidation, caustic and nuclear service. |
|---|---|
| Typical service | Furnaces & heat treating — Muffles, retorts and radiant tubes. |
| B16.5 material group | 3.5 |
| Bolting | B7 (coated), B8M or nickel-alloy studs such as Inconel 600 from ASTM B166, as the project specifies |
| Welding to carbon steel | A nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel |
| Matching filler | ERNiCr-3 (AWS A5.14) |
Inconel 600 Socket Weld Flange Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 72.0 min |
| Chromium | 14.0 – 17.0 |
| Iron | 6.0 – 10.0 |
| Carbon | 0.15 max |
| Manganese | 1.0 max |
| Silicon | 0.5 max |
| Copper | 0.5 max |
| Sulphur | 0.015 max |
Inconel 600 Socket Weld Flange Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 550 MPa · 80 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Full chemistry, properties and equivalents are on the Inconel 600 grade page.
Other Inconel 600 flanges
Inconel 600 Socket Weld Flanges for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 600 Socket Weld Flange dimensions — ASME B16.5 Class 150 & 300
Outside diameter, thickness and bolting are set by size and class. Values in mm; thickness excludes the 1.6 mm raised face.
| NPS | Cl 150 OD | Cl 150 thickness | Cl 150 bolt circle | Cl 150 bolts | Cl 300 OD | Cl 300 thickness | Cl 300 bolt circle | Cl 300 bolts |
|---|---|---|---|---|---|---|---|---|
| ½" | 90 | 9.6 | 60.3 | 4 × ½" | 95 | 12.7 | 66.7 | 4 × ½" |
| 1" | 110 | 12.7 | 79.4 | 4 × ½" | 125 | 15.9 | 88.9 | 4 × ⅝" |
| 1½" | 125 | 15.9 | 98.4 | 4 × ½" | 155 | 19.1 | 114.3 | 4 × ¾" |
| 2" | 150 | 17.5 | 120.7 | 4 × ⅝" | 165 | 20.7 | 127.0 | 8 × ⅝" |
| 3" | 190 | 22.3 | 152.4 | 4 × ⅝" | 210 | 27.0 | 168.3 | 8 × ¾" |
| 4" | 230 | 22.3 | 190.5 | 8 × ⅝" | 255 | 30.2 | 200.0 | 8 × ¾" |
| 6" | 280 | 23.9 | 241.3 | 8 × ¾" | 320 | 35.0 | 269.9 | 12 × ¾" |
| 8" | 345 | 27.0 | 298.5 | 8 × ¾" | 380 | 39.7 | 330.2 | 12 × ⅞" |
| 10" | 405 | 28.6 | 362.0 | 12 × ⅞" | 445 | 46.1 | 387.4 | 16 × 1" |
| 12" | 485 | 30.2 | 431.8 | 12 × ⅞" | 520 | 49.3 | 450.8 | 16 × 1⅛" |
Full chart: ASME B16.5 flange dimensions.
Inconel 600 Socket Weld Flange — questions buyers ask
Why leave a gap in a socket weld?
The gap lets the pipe expand during welding without cracking the fillet weld. ASME B31.3 requires it.
What pressure rating does a Inconel 600 socket weld flange have?
It depends on class and temperature. Inconel 600 forgings are in ASME B16.5 material group 3.5; read your class column in that group's table at the design temperature.
Can Inconel 600 socket weld flanges be welded to carbon steel?
Yes — a nickel-base filler such as ERNiCr-3 (or ERNiCrMo-3) is used when joining it to carbon steel.
Which standard covers Inconel 600 socket weld flanges?
The material is ASTM B564; dimensions follow ASME B16.5. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Inconel 600 socket weld 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.
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