SUS630, as a martensitic precipitation-hardening stainless steel, is widely known by a common international name 17-4PH. Under different standards worldwide, it also has specific corresponding designations, as detailed below:
Japan: The corresponding designation is SUS630 which is in accordance with the Japanese JIS standard. It is one of the original and commonly used designation for this material in Japan and related cooperative industries.
China: There are several corresponding national standard designations. The new designation is 05Cr17Ni4Cu4Nb, while the former one was 0Cr17Ni4Cu4Nb. In addition, it has the numerical designation S51740, which complies with China’s steel numerical classification system. Compared with the old grade, the new designation mainly adjusts the expression of carbon content, making it more consistent with current material standard requirements.
United States: This material has multiple commonly used designations. Under the UNS system, it is S17400. Under ASTM and AISI standards, it is designated as 630. It is also commonly known as SAE 17-4PH, a name that is widely used in the international market and frequently applied in aerospace and industrial component material specifications.
Germany: Under the DIN standard, the corresponding designation is 1.4542. This designation is widely used in European mechanical manufacturing and precision component processing, with chemical composition and mechanical properties highly consistent with those of SUS630.
Europe: Under the EN standard, the corresponding designation is X5CrNiCuNb16-4. This designation meets the material selection requirements of European industries such as equipment manufacturing and automotive components, and satisfies relevant processing and service performance demands.