Inconel 600 Pipe FittingsASTM B366 WPNCI · Manufacturer, stockist & exporter, India
Also sold as Alloy 600 · UNS N06600 · W.Nr 2.4816 · Nicrofer 7216
Inconel 600 pipe fittings are made to ASTM B366 WPNCI for buttweld fittings and ASTM B564 for forged socket-weld and threaded fittings, with dimensions to ASME B16.9 and B16.11. It is a nickel–chromium–iron alloy, chosen for high-temperature oxidation, caustic and nuclear service. Kanak Steel & Engineering Co. supplies it with EN 10204 3.1 mill certificates from Mumbai to buyers across India, the Gulf, South-East Asia, South America, Europe, the UK and the USA.
- Stock & mill supply
- EN 10204 3.1 / 3.2
- PMI on every heat
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is Inconel 600 Pipe Fittings?
Inconel 600 pipe fittings is a nickel–chromium–iron alloy supplied as pipe fittings to ASTM B366 WPNCI (UNS N06600). Buyers specify it for high-temperature oxidation, caustic and nuclear service. It is also sold as Alloy 600, UNS N06600, W.Nr 2.4816.
- What it is
- Nickel–chromium–iron alloy
- Buttweld
- ASTM B366 WPNCI
- Forged
- ASTM B564
- Dimensions
- ASME B16.9 · B16.11 · MSS SP-43
- Sizes
- Buttweld ½" – 48" · forged ⅛" – 4"
- Best at
- High-temperature oxidation, caustic and nuclear service
Inconel 600 Pipe Fittings Specification & Sizes
| Buttweld fittings | ASTM B366 WPNCI — dimensions to ASME B16.9, MSS SP-43 |
|---|---|
| Forged fittings | ASTM B564 — dimensions to ASME B16.11 |
| Short-radius elbows | ASME B16.9 (formerly B16.28) |
| Buttweld sizes | NPS ½" to 48", schedule to match the pipe |
| Forged classes | Socket weld 3000 / 6000 / 9000 · threaded 2000 / 3000 / 6000 |
| Types | Elbow · Tee · Reducer · Cap · Stub end · Cross · Bend · Lateral · Coupling · Union · Nipple · Plug |
| Testing | PMI · dimensional · radiography of welded fittings · IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
Standards on this page
Choosing Inconel 600 Fittings: Elbow Radius, Schedule & Class
State seamless or welded, and the non-destructive examination you need on welds.
Radius (LR, SR, 3D), the schedule-to-class map and the 1.5 mm socket-weld gap are explained in the fittings guide. For 600, buttweld fittings are ASTM B366 WPNCI and forged fittings ASTM B564.
Inconel 600 Pipe Fittings 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 Pipe Fittings Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 550 MPa · 80 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Density & Physical Properties
| Property | Value |
|---|---|
| Density | 8.47 g/cm³ |
| Melting range | 1354 – 1413 °C |
| Magnetic | Non-magnetic |
Inconel 600 Equivalent Grades
Values follow ASTM B168 for UNS N06600. Always check against the edition named on your purchase order.
Inconel 600 buttweld fitting dimensions — ASME B16.9
Centre-to-end and end-to-end dimensions are the same for every alloy; the wall thickness follows the pipe schedule. Values in mm.
| NPS | OD | 90° LR elbow A | 45° elbow B | Tee C | Reducer H | Cap E |
|---|---|---|---|---|---|---|
| ½" | 21.3 | 38 | 16 | 25 | — | 25 |
| 1" | 33.4 | 38 | 22 | 38 | 51 | 38 |
| 1½" | 48.3 | 57 | 29 | 57 | 64 | 38 |
| 2" | 60.3 | 76 | 35 | 64 | 76 | 38 |
| 3" | 88.9 | 114 | 51 | 86 | 89 | 51 |
| 4" | 114.3 | 152 | 64 | 105 | 102 | 64 |
| 6" | 168.3 | 229 | 95 | 143 | 140 | 89 |
| 8" | 219.1 | 305 | 127 | 178 | 152 | 102 |
| 10" | 273.1 | 381 | 159 | 216 | 178 | 127 |
| 12" | 323.9 | 457 | 190 | 254 | 203 | 152 |
Full chart to 24": ASME B16.9 fitting dimensions.
Six-digit Harmonized System heading (nickel alloy, chapter 75). Your country adds its own digits — confirm with your customs broker. All HS codes.
How to Verify Inconel 600 Pipe Fittings with PMI
Positive material identification with a handheld XRF gun confirms the alloy on the piece itself, in seconds, before it is cut or welded. Inconel 600 is most often mixed up with Incoloy 800 / 800H / 800HT — the table shows which elements tell them apart.
Handheld XRF does not measure carbon or nitrogen; those come from the mill certificate or optical emission (OES) testing. We PMI-test nickel alloys as standard and any grade on request.
| Element | Inconel 600 | Incoloy 800 / 800H / 800HT |
|---|---|---|
| Nickel | 72.0 min | 30.0 – 35.0 |
| Chromium | 14.0 – 17.0 | 19.0 – 23.0 |
| Copper | 0.5 max | 0.75 max |
| Titanium | residual | 0.15 – 0.60 |
| Iron | 6.0 – 10.0 | 39.5 min |
| Manganese | 1.0 max | 1.5 max |
Inconel 600 Pipe Fittings Price — What Decides It
Two quotes for "600 pipe fittings" can differ by 20% and both be fair. We quote 600 pipe fittings per kg for full sizes and per piece for cut sizes. These six things move the price per kg, so you can compare offers like for like.
Inconel 600 pipe fittings by type
Inconel 600 Pipe Fittings Applications
Inconel 600 is specified when the cheaper grade will not survive the service but a higher alloy would be more than the job needs. These are the jobs our buyers use it for.
Inconel 600 Pipe Fittings vs 310S, 800 and 625
| Grade | Pipe Fittings standard | PREN (approx.) | Pick it when |
|---|---|---|---|
| Incoloy 800 / 800H / 800HT | ASTM B366 WPNIC | — | Furnaces, petrochemical heaters and high-temperature piping |
| Inconel 600 | ASTM B366 WPNCI | — | High-temperature oxidation, caustic and nuclear service |
| SS 310 / 310S | ASTM A403 WP310S | ≈ 25 | Furnaces, burners and heat treatment at high temperature |
| Inconel 625 | ASTM B366 WPNCMC | ≈ 51 | Seawater, high strength and high temperature in one alloy |
PREN = Cr + 3.3 Mo + 16 N, from mid-range chemistry. A screening guide, not a substitute for corrosion data on your medium.
Inconel 600 Corrosion Resistance — Element by Element
Each alloying addition has a job. Knowing which one protects against your medium is the quickest way to judge whether 600 fits.
Over 72% nickel makes 600 practically immune to chloride stress-corrosion cracking and very good in caustic soda.
Chromium gives oxidation resistance to about 1175 °C.
Resists carburising and nitriding atmospheres in furnaces.
Not a first choice for sulphuric or hydrochloric acid — see 825 or C276.
How your 600 pipe fittings order runs
- 01Enquiry review — we confirm size, standard edition and documents against your MR or drawing.
- 02Heat selection & PMI — the mill certificate is checked and material is PMI-tested before processing.
- 03Processing — cutting, machining or bevelling to your specification, with heat numbers marked.
- 04Inspection — your third-party inspector witnesses, or we share photos and test reports.
- 05Packing & dispatch — seaworthy packing from Nhava Sheva (JNPT), Mumbai, FOB or CIF, documents sent before the vessel sails.
Standards on this page
Welding & Fabricating Inconel 600 Pipe Fittings
Inconel 600 welds by all common arc processes. A few points our buyers ask about:
| Matching filler | ERNiCr-3 (AWS A5.14) |
|---|---|
| Over-alloyed filler | ENiCrFe-3 electrode |
| Preheat | Not required; keep interpass temperature low |
| Cutting | Thermal or abrasive cutting; grind off heat-tinted edges before welding |
Follow your approved WPS; this is general guidance. See also 600 fittings and 600 flanges for the matching pipe-system parts.
How to Order Inconel 600 Pipe Fittings: RFQ Checklist
Get an accurate quote the first time. Copy this list into your enquiry:
- Fitting type, size and schedule / class
- Buttweld, socket weld or threaded
- Seamless or welded (buttweld fittings)
- Material standard and grade marking
- Certificate type and extra tests
- Delivery port, Incoterm and required date
Inconel 600 pipe fittings for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 600 pipe fittings — questions buyers ask
Is Inconel 600 the same as Alloy 600?
Yes. Alloy 600, UNS N06600, W.Nr 2.4816 all refer to the same material, and pipe fittings is ordered to ASTM B366 WPNCI whichever name is on the enquiry.
Which standard covers Inconel 600 buttweld fittings?
ASTM B366 WPNCI is the material specification; dimensions follow ASME B16.9 (and MSS SP-43 for light-wall fittings). Forged socket-weld and threaded fittings are made from ASTM B564 material to ASME B16.11.
What is the difference between Inconel 600 WP-S and WP-W fittings?
Seamless fittings are made from seamless pipe or bar; welded fittings are formed from plate or welded pipe. State which you need and the weld examination required.
Can Inconel 600 fittings 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.
Inconel 600 or Inconel 625 — which should I choose?
Inconel 600 is chosen for high-temperature oxidation, caustic and nuclear service. Inconel 625 is the step up when you need more pitting resistance or strength. See the comparison table on this page, or ask us with your process conditions.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026