Technical Overview of the ASTM/ASME A/SA 352M Standard
The ASTM A352/A352M specification governs the manufacturing of steel castings intended for use in pipeline valve components (gate valves, valves, flanges, fittings) operating under high pressure in extremely low-temperature environments. Products supplied by EV Group China fully comply with these standards, ensuring the reliability of cryogenic equipment.
The standard covers a range of ferritic and martensitic steel grades. The production process and testing program are selected by EV Group China engineers based on the specifics of project loads and operating temperature regimes. One of the key characteristics is the impact test temperature, which determines the fracture toughness of the material. When selecting a grade, it is important to consider that the hardenability of alloying elements imposes limitations on the maximum wall thickness of the casting, beyond which the required mechanical properties are no longer maintained.
Note for designers: In addition to ferritic and martensitic steels, austenitic grades according to the A351/A351M standard can be used for operation in cryogenic environments (down to -184°C and below). EV Group China specialists are ready to coordinate individual impact toughness levels and test temperature regimes for such special orders, based on the data in Appendix X1 of the specification.
Technical requirements in EV Group China documentation are presented in two measurement systems: inch-pound (ASTM A352) and SI (ASTM A352M). It is important to strictly adhere to the selected system of units when ordering, as mixing them is unacceptable due to differences in tolerance values.