17-4 PH Stainless Steel
1.4542 (17-4 PH)
- EN1.4542
- ENX5CrNiCuNb16-4
- AISI630
- UNSS17400
- Ticari17-4 PH
Widely used precipitation-hardening (PH) stainless steel. Combines corrosion resistance close to austenitic stainless steels with the ability to reach high mechanical strength through heat treatment (H900–H1150), like martensitic grades. Preferred for its high strength and good machinability; suitable for forging, casting and cold forming. Magnetic.
01Applications
- High-performance industries such as aerospace, space, oil and gas
- Jet engines
- Hydraulic cylinders
- Pump and valve shafts
- Seawater-exposed parts of ships and submarines
- Chemical plants
- Kitchen equipment
02Delivery Condition
- 28–48 HRC
03Heat Treatment
Typical values
- Solution treatment
- 1020–1060 °C, rapid cooling (air/oil)
- Hardness, solution treated (A)
- ≈ 33–36 HRC
- H900 / H950
- 482 / 510 °C, 1–4 h → maximum hardness
- H1025 / H1075
- 552 / 580 °C, 4 h → strength + toughness
- H1100 / H1150
- 593 / 621 °C, 4 h → maximum toughness and corrosion resistance
- Dimensional change
- ≈ −0.05…−0.1 % on ageing
Heat treatment cycle (schematic)
Ageing diagram (approximate)
Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.
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