17-4 PH / 1.4542
Business Unit Manager Medical, Aerospace, Industry
17-4PH is a well-established precipitation hardening martensitic stainless steel capable of achieving very high strength and hardness after a relatively simple heat treatment. It offers excellent corrosion resistance combined with a structured range of mechanical property levels depending on the precise heat treatment applied.
The materials can be readily machined and fabricated in the softer tempers and can then be heat-treated to exceptional strength and dimensional stability. 17-4PH is widely used in the chemical, petrochemical, offshore, paper, and aerospace industries making best use of its outstanding corrosion resistance, wear resistance, strength and hardness.
Specifications
UNS S17400 AMS 5643, AMS 5604, ASTM A564
Main fields of application of 1.4542
Surgical and dental instrument, screwdriver.
17- 4 retains a high strength of precipitation hardening stainless steels. A majority of applications are within the aerospace sector and OAG applications:
- Valves and engine components
- Turbine blades
- Gears
- Shafts
- Aircraft structures
Chemical composition of 1.4542
| Element | % |
|---|---|
| Cr | 15,0 - 17,0 |
| Ni | 3,0-5,0 |
| Cu | 3,0-5,0 |
| C | max 0,070 |
Characteristics of 1.4542
| Specification values | |
|---|---|
| Annealed (tensile strength Rm) | 1000-1100 MPa |
| Annealed (elongation A) | 5 - 8 |
| Aged at 480 ⁰C (tensile strength Rm) | 1150 – 1350 MPa |
| Aged at 480 ⁰C (elongation A) | 7 - 15 |
Heat treatment
Alloy 17-4PH is provided in the solution-annealed condition (Condition A). Mechanical properties may be improved by subsequent age hardening treatments. These aging treatments are commonly described as conditions H900, H1025, H1075, H1150, H1150M and H1150D.
Mechanical properties of 1.4542
| Condition | UTS | Yield Strength | Elongation | Reduction of area | Hardness Brinell | Hardness Rockwell |
|---|---|---|---|---|---|---|
| H900 | 190.000 | 170.000 | 6 | 15 | 388 | C40 |
| H1025 | 155.000 | 125.000 | 8 | 27 | 331 | C35 |
| H1075 | 145.000 | 125.000 | 9 | 28 | 311 | C32 |
| H1150 | 135.000 | 105.000 | 11 | 30 | 277 | C28 |
| H1150m | 115.000 | 75.000 | 14 | 35 | 255 | - |
Delivery program
Hempel Special Metals are able to supply this grade in many of the conditions in the following forms :
- Sheet/ Plate/ strip 0.2mm < 90mm
- Bars 6.35mm Dia < 250mm Dia
