17-4 PH / 1.4542
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.
- 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
- Aircraft structures
Chemical composition of 1.4542
|Cr||15,0 - 17,0|
Characteristics of 1.4542
|tensile strength Rm||1000-1100 MPa|
|elongation A||5 - 8|
|Aged at 480 ⁰C||specification values|
|tensile strength Rm||1150 – 1350 MPa|
|elongation A||7 - 15|
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.
|Condition||UTS||0.2% Yield||Elongation||Reduction of area||Hardness Brinel|
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
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Paul MallettAerospace Manager
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