15-5PH – 17-4PH – 1.4540 – 1.4542 – 1.4545 – 1.4548 – 1.4594 – X5CrNiCuNb17-4-4 – X5CrNiCuNb16-4 -X5CrNiMoCuNb14-5 AISI 630 – AISI XM-12 – AISI XM-25 – UNS S15500 – UNS S17400 – UNS S45000 – BS-EN-10088-3 Grade 1.4594 – ASTM A-564 Type 630 – ASTM A-564 Type XM-12 – ASTM A-564 Type XM-25 ASTM A705 – AMS 5604 – AMS 5642 – AMS 5643 – AMS 5659 – AMS 5862 – AFNOR Z7CNU17-04 – AFNOR – Z7CNU15-05 – JIS SUS630 – JIS SUS15-5PH – JIS SUS17-4PH – JIS SCS24 – FV520B – NACE MR0103 – NACE MR0175 – Bohler T670 – MSRR 6601 – Custom 630 – Grade A – H900 – H925 – H1025 – H1075 – H1100 – H1125 – H1150 – H1150D – H1150M – ESR
17-4 PH and it’s successor 15-5 PH, are martensitic precipitation hardening stainless steels with additions of copper (Cu), niobium (Nb) and tantalum (Ta). The grade combines high strength and hardness values with moderate corrosion resistance. Different heat treatment temperatures can optimize mechanical properties, e.g. yield strength at 1100 – 1300MPa. To achieve good toughness at low temperatures, precipitation-hardening temperatures below 550°C are not recommended.
17-4 and 15-5 provide an outstanding combination of high strength, solid mechanical properties, good corrosion resistance, outstanding wear resistance and good toughness at temperatures up to 310°C. 17-4 PH is used in chemical, petrochemical, paper and general metalworking industries. Approved by NACE for restricted components and environments and it has good weldability.
