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Inconel 600 Butt Weld Fittings | UNS N06600 SB-564
Inconel 600 butt weld fittings (UNS N06600) forged to ASME SB-564 and dimensioned to ASME B16.9. The 14% to 17% chromium gives outstanding resistance to oxidising media and dry heat, while the high nickel base resists caustic solutions and reducing acids.
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This page covers the alloy dimension. For the full range of butt weld fitting forms in any nickel alloy, see our nickel alloy butt weld fittings overview.
Specification
| Designation | Value |
|---|---|
| UNS number | N06600 |
| Material specification | ASME SB-564 (Nickel Alloy Forgings) |
| Dimensional standard | ASME B16.9 |
| Material class | Nickel-chromium-iron |
Note on specifications: SB-564 is the correct ASME Section II specification for forged nickel alloy fittings. SA-182 covers low alloy and stainless steel only and does not include any nickel alloy grades.
Product Range
| Fitting | Types |
|---|---|
| Socket weld elbow | 45°, 90°, 180° / reducing |
| Socket weld tee | Equal and reducing, straight and branch |
| Socket weld cross | Equal and reducing |
| Socket weld reducer | Concentric and eccentric |
| Socket weld coupling | Standard |
| Socket weld cap | Standard and heavy |
| Plug | Square head and hex head |
Chemical Composition (ASME SB-564)
| Element | Composition, % | Element | Composition, % |
|---|---|---|---|
| Nickel | Remainder | Carbon | 0.15 max |
| Chromium | 14.0 – 17.0 | Manganese | 1.0 max |
| Iron | 6.0 – 10.0 | Silicon | 0.5 max |
| Copper | 0.5 max | Sulfur | 0.015 max |
Limits from ASME SB-167 Table 1.
Dimensional Range
| Condition and size | Tensile, min psi (MPa) | Yield (0.2%), min psi (MPa) | Elongation, min % |
|---|---|---|---|
| Annealed, 5 in. (127 mm) OD and under | 70 000 (480) | 28 000 (195) | 35 |
| Annealed, over 5 in. (127 mm) OD | 70 000 (480) | 25 000 (170) | 35 |
Quality Control
- EN 10204 3.1 mill test certificate on every fitting
- Full chemical analysis by XRF or OES, actual heat values on the certificate
- Dye penetrant inspection on every fitting; ultrasonic testing on heavy wall and forgings
- Dimensional inspection against the governing dimensional standard
- Intergranular corrosion testing to ASTM G28 available on request
- Third-party inspection by Lloyd’s, BV, DNV, SGS or TUV on request
Surface, Marking and Packing
Fittings are supplied solution annealed and pickled, with a bright annealed or pickled surface as required. Each fitting carries heat number, grade, standard, size, heat treatment condition and our works mark. Export packing in wooden cases or steel pallets with plastic end caps.
Technical Enquiries
Send the grade, fitting type, nominal size, schedule, quantity and any third-party inspection requirement to our technical sales desk. We will confirm dimensional tolerance, delivery condition and the applicable ASME line item, and quote FOB Shanghai or Ningbo.
Applications
- Heat treatment furnace hardware, radiant tubes and baskets
- Caustic and alkaline chemical processing
- Oxidising acid handling, including nitric
- Food processing and pharmaceutical equipment
- Heat exchanger and furnace components
Related Products
- Nickel alloy butt weld fittings — all forms, all alloys
- Nickel alloy socket weld fittings
- Nickel alloy flanges
Frequently Asked Questions
When should I choose 600 over 625?
Choose 600 for oxidising media, dry heat and caustic service. Choose 625 when chlorides, seawater or sour service dominate, since 625 roughly triples the molybdenum content and gives far more pitting margin.
What temperature can 600 handle?
Inconel 600 is used continuously up to about 1,100°C and intermittently higher. It is one of the most widely specified alloys for heat treatment work because it does not scale significantly and retains strength.
Is 600 weldable without post-weld heat treatment?
Yes for most service. It has good weldability and does not normally require solution annealing after welding. For high-temperature service where dimensional stability matters, specify the annealed condition.
Do you supply EN 10204 3.1 certificates?
Yes, as standard, with third-party inspection available on request.
