Nickel and nickel alloys · Сплав А494 Grade CW12MW / SА494 Grade CW12MW / N30002
Alloy ASTM A494 Grade CW12MW: Engineering Reference Guide to Properties and Applications
Engineering Specification of Alloy A494 Gr CW12MW / SA 494 Gr CW12MW
| Standard | Classification | Application Area |
|---|---|---|
| ASTM A494 – Specification for Nickel and Nickel Alloy Castings | Corrosion-resistant cast nickel alloy | Manufacturing of cast components for high-pressure systems, including centrifugal pump casings, valves, flanges, and fittings, designed to operate in concentrated acids and alkalis. |
| ASTM A494 – Specification for Nickel and Nickel Alloy Castings | Corrosion-resistant cast nickel alloy | Manufacturing of cast components for high-pressure systems, including centrifugal pump casings, valves, flanges, and fittings, designed to operate in concentrated acids and alkalis. |
Elemental Composition of Alloy Grade CW12MW according to ASTM A494
EV Group China technologists emphasize that precise control of elemental composition is a key factor in ensuring microstructure homogeneity and predictable performance characteristics of castings. The normalized mass fraction values of elements are presented below:
| C | <0,35 |
|---|---|
| Si | <1,25 |
| Mn | <1,5 |
| P | <0,03 |
| S | <0,02 |
| Cu | 27–33 |
| Fe | <3,5 |
| Ni | Base |
Mechanical Properties of Alloy A 494 Grade CW12MW / SA 494 Grade CW12MW
The indicated values are the minimum requirements of the ASTM A494 standard and serve as a basis for strength calculations of components operating under high pressure:
| Tensile Strength (Ultimate Tensile Strength), min., MPa | Yield Strength, min., MPa | Elongation, min., % |
|---|---|---|
| 450 | 170 | 25 |
Physical Constants and Properties
The physical density of alloy A494 Gr CW12MW (SA494 Gr CW12MW), equal to 9.18 g/cm³, is a fundamental parameter for engineering calculations. It is used for accurate determination of the mass of finished products and evaluation of inertial and weight loads on connected structures and foundations.
Processability and Weldability
The alloy demonstrates satisfactory weldability with strict adherence to recommended welding procedure specifications. According to EV Group China's classification based on ISO 15608, the material belongs to the following group:
| Weldability | According to ISO 15608 |
|---|---|
| Weldability | Group 43 |
| Weldability | Group 43 |
Equivalent Grades and Standards for A494 CW12MW
When selecting alternative materials for design or repair work, careful verification of the equivalence of chemical composition and mechanical properties is necessary, guided by the following international specifications:
| Germany (DIN) | Great Britain (BS) | USA (ASTM/ASME) |
|---|---|---|
| 2.4602, NiCr21Mo14W | ANC 16 | 5388, A 781 Grade CW12MW, ERNiCrMo-5A |