Inconel 602 CA · UNS N06025
Inconel 602 CA (N06025): composition, properties, fittings and flanges
Inconel 602 CA (N06025) is High-chromium, high-aluminium nickel alloy with yttrium addition. Inconel 602 CA is specified at Nickel Balance, Chromium 24.0 - 26.0, Aluminium 1.80 - 2.40. Inconel 602 CA is engineered for extreme oxidation and carburisation resistance to 1200 °C: the aluminium-rich oxide scale is locked in place by…
- UNS
- N06025
- W. Nr.
- -
- Density
- 7.90 g/cm³ (0.285 lb/in³)
- Key strength
- 675 MPa / 98 ksi
Identification and standards
| Short form | Inconel 602 CA · UNS N06025 |
|---|---|
| Classification | High-chromium, high-aluminium nickel alloy with yttrium addition |
| UNS | N06025 |
| Werkstoff number | - |
| Material family | Inconel Alloys |
Chemical composition
| Element | Composition (wt %) | Why it is there |
|---|---|---|
| Nickel (Ni) | Balance | Matrix |
| Chromium (Cr) | 24.0 - 26.0 | Oxidation resistance |
| Aluminium (Al) | 1.80 - 2.40 | Adherent alumina scale |
| Iron (Fe) | 8.0 - 11.0 | Matrix |
| Carbon (C) | 0.15 - 0.25 | Creep strength |
| Titanium (Ti) | 0.10 - 0.20 | - |
| Yttrium (Y) | 0.05 - 0.12 | Scale adhesion under thermal cycling |
| Silicon (Si) | 0.50 max | - |
Note Single figures are maximum limits unless shown as a range. Always confirm against the heat-specific EN 10204 3.1 certificate supplied with your order.
Mechanical properties
| Tensile strength, min (annealed) | 675 MPa / 98 ksi |
|---|---|
| 0.2 % yield strength, min | 270 MPa / 39 ksi |
| Elongation in 2 in, min | 30 % |
| Typical hardness, annealed | 170 - 220 HB |
| Maximum service temperature in air | About 1200 °C |
Warning Values depend on product form, section thickness and heat treatment. Larger sections generally achieve lower strength than thin product; always design against the applicable code allowable stress rather than these figures.
Physical properties
| Density | 7.90 g/cm³ (0.285 lb/in³) |
|---|---|
| Melting range | 1330 - 1400 °C (2425 - 2550 °F) |
| Modulus of elasticity | 206 GPa (29.9 x 10⁶ psi) |
| Thermal conductivity at 20 °C | 11.3 W/m·K |
| Mean coefficient of thermal expansion, 20-100 °C | 13.5 µm/m·°C |
| Specific heat capacity | 470 J/kg·K |
Specifications by product form
| Forgings & flanges | ASTM B564 / ASME SB-564 (UNS N06025) |
|---|---|
| Butt weld fittings | ASTM B366 (WP grade to order) |
| Seamless pipe & tube | ASTM B167 family or to order |
| Plate / sheet / strip | ASTM B168 |
| Bar / rod | ASTM B166 |
| Welding consumables | ERNiCr-3 or matching alumina-forming filler |
| UNS / EN / China | UNS N06025 · W. Nr. 2.4633 |
Product forms available
Hangbo supplies this grade in the following forms. Sizes outside the listed range can often be produced to order.
- Forged flanges blanks and finished flanges to ASME B16.5, B16.47 Series A/B and B16.36
- Butt weld elbows, tees, reducers, caps and stub ends to ASME B16.9 and MSS SP-43
- Seamless pipe and tube to the applicable ASTM / ASME pipe specification
- Forged rings, discs and hubs machined to your drawing
Typical applications
- Rotary kilns, calciner internals and furnace rollers
- Glass and ceramic furnace components
- Catalytic converter and thermal oxidiser internals
- Radiant tubes and burner nozzles above 1100 °C
Welding, forming and machining
- Welding
- Weldable with ERNiCr-3 type filler, but joint efficiency and scale performance at extreme temperature should be proven on a qualification coupon before production welding.
- Heat treatment
- Solution anneal at 1150 - 1200 °C and rapid cool. No precipitation ageing treatment is used.
- Hot and cold forming
- Hot work in the range stated by the mill for this grade, then re-solution or re-age before final machining so that the delivered condition matches the certificate.
- Machining
- Machine with sharp carbide or high-speed steel tooling, positive rake, constant feed and ample coolant. Never dwell - the surface work-hardens quickly.
Buy Inconel 602 CA from Hangbo
Material is supplied with full heat-number traceability, solution annealing or ageing performed under calibrated furnace control, and an EN 10204 3.1 certificate covering chemical analysis, mechanical properties, heat treatment records and the agreed NDT scope. Positive material identification and third party inspection and test reports from SGS are available for critical service.