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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
  • Gears
  • Shafts
  • Aircraft structures


Chemical composition of 1.4542

Cr 15,0 - 17,0
Ni 3,0-5,0
Cu 3,0-5,0
C max 0,070

Characteristics of 1.4542

annealed specification values
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

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

Condition UTS 0.2% Yield Elongation Reduction of area Hardness Brinel
H900 190.000 170.000 10 40 388
H1025 155.000 145.000 12 45 331
H1075 145.000 125.000 13 45 311
H1150 135.000 105.000 16 50 277
H1150m 115.000 75.000 18 55 255
H1150-D 125.000 105.000 16 50 255

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

Material Outlet by Hempel

ECONOXX.com offers buyers a new and uncomplicated procurement channel, which also includes small quantities and materials in special alloys at favourable conditions.

Product Count

Round bars (1)

Round bars Round bars 1.4542 - 630

Contact us

Marcel Zuber
Marcel Zuber
CBDO Chief Business Development Officer

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