17-4 PH SS Plate Hardening Stainless Steel

17-4 PH ss hardening plate is used in chemical, petrochemical, paper and general metalworking industries. Equivalent to EN 1.4542, UNS S17400, and AISI 630.
17-4 PH SS Chemical Composition(by weight)
Carbon: 0.07% (Max)
Silicon: 1.00% (Max)
Manganese: 1.00% (Max)
Phosphorous: 0.040% (Max)
Sulfur: 0.030% (Max)
Chromium: 15%-17.5%
Molybdenum: 0.50% (Max)
Nickel: 3%-5%
Copper: 3%-5%
17-4 PH Alloy is a martensitic precipitation hardening stainless steel with additions of copper (Cu), niobium (Nb) and tantalum (Ta). 17-4 PH stainless steel plate provides an outstanding combination of high strength, good mechanical properties, good corrosion resistance, outstanding wear resistance and good toughness at temperatures up to 310°C. The grade combines high strength and hardness values with moderate corrosion resistance.
Solution annealing at 1000 to 1050°C, hardened at 480°C (H900) to 621°C (H1150). DH1150: Double aged at 1150F – 620°C. Different heat treatment temperatures can optimize mechanical properties, e.g. yield strength at 1100 – 1300MPa. Age hardening is can also be performed at 480°C to 620°C in a one-step process, where the lowest temperature gives the highest strength. To achieve good toughness at low temperatures, precipitation-hardening temperatures below 550°C are not recommended.