Nickel and nickel alloys · Сплав А494 Grade CY40 / SА494 Grade CY40 / N06040
ASTM A494 Grade CY40: Engineering Handbook for Cast Nickel-Chromium Alloy
Engineering Data Sheet for Cast Alloy ASTM A494 Grade CY40
Cast nickel-chromium alloy ASTM A494 Grade CY40 is a structural material developed by EV Group China technologists for application in high-temperature and corrosive environments. This alloy is a cast analog of wrought alloy UNS N06600 (Inconel 600). Nickel (Ni) alloying provides high resistance to stress corrosion cracking (SCC) in chloride-containing media, while chromium (Cr) forms a passive oxide film that protects against high-temperature oxidation.
| Standard | Classification | Application Areas | European Specifications |
|---|---|---|---|
| ASTM A494 – Specification for Castings, Nickel and Nickel Alloy | Corrosion-resistant Nickel-Chromium Alloy (Cast Nickel-Chromium Alloy) | Manufacturing of cast components for critically important units: pump casings, shut-off and control valves, flanges and fittings for systems operating in petrochemical, energy, and nuclear industries | 2.4816, NiCr15Fe |
| ASTM A494 – Specification for Castings, Nickel and Nickel Alloy | Corrosion-resistant Nickel-Chromium Alloy (Cast Nickel-Chromium Alloy) | Manufacturing of cast components for critically important units: pump casings, shut-off and control valves, flanges and fittings for systems operating in petrochemical, energy, and nuclear industries | 2.4816, NiCr15Fe |
Chemical Composition of ASTM A494 CY40 Alloy, % by mass
The elemental composition of CY40 alloy is strictly regulated by the ASTM A494 standard to achieve a stable austenitic microstructure and optimal casting characteristics. The controlled content of carbon (C) and silicon (Si) ensures the necessary fluidity for producing complex castings, while maintaining a sufficient level of ductility and weldability of the material.
| C | ≤ 0,4 |
|---|---|
| Si | ≤ 3,0 |
| Mn | ≤ 1,5 |
| P | ≤ 0,03 |
| S | ≤ 0,02 |
| Cr | 14,0 – 17,0 |
| Fe | ≤ 11,0 |
| Ni | Base |
Mechanical Properties of ASTM A494 Gr. CY40 Alloy at 20°C
The standardized mechanical properties are determined by the results of uniaxial tensile tests of standard specimens taken from castings. The alloy demonstrates a balanced ratio of strength properties (tensile strength, yield strength) and ductility properties (elongation), which is a key requirement for pressure vessels and equipment operating under pressure.
| Tensile Strength (Rm), min., MPa | Yield Strength (Rp0.2), min., MPa | Elongation (A5), min., % |
|---|---|---|
| 485 | 195 | 30 |
Main Physical Properties
The density of CY40 alloy under normal conditions is 8.37 g/cm³. This fundamental parameter is used in engineering calculations to determine the mass of finished products and in modeling hydrodynamic and thermal processes in equipment.
Processability and Weldability
CY40 alloy is readily weldable by most standard methods. To prevent hot cracking and maintain the corrosion resistance of the welded joint, it is recommended to use welding materials with a similar or nickel-enriched composition (for example, ERNiCr-3) and adhere to welding technology for nickel alloys, including control of interpass temperature. Weldability classification is provided below.
| Weldability Parameters | ISO 15608 Classification | ASME Section IX Classification | |
|---|---|---|---|
| Weldability Parameters | Group 43 (Nickel Alloys) | Welding operations | Brazing |
| Weldability Parameters | Group 43 (Nickel Alloys) | P-Number: 43 | P-Number: 111 |
Equivalents and Analogs of ASTM A494 CY40 Alloy
To simplify international cooperation and procurement, the main analogs and brands of CY40 alloy with similar composition and properties according to various national and international standards are presented below:
| Germany (DIN / EN) | Japan (JIS) | Great Britain (BS) | China (GB) |
|---|---|---|---|
| NiCrFe, F50, 2.4816.10, 4816, P 600 | NCrFC, NCF600, NAS 600 | NiCr, 15 Fe 8, HR 208 | 1Cr15Ni75Fe8, HGH600, NS312 |