17-4PH is a martensitic precipitation hardening stainless steel. The performance characteristic of 17-4PH is that it is easy to adjust the strength level, which can be adjusted by changing the heat treatment process. 17-4PH has good attenuation performance, strong resistance to corrosion fatigue and water droplets.
Standards | Material No.1.4542EN DesignationX5CrNiCuNb16-4AISI/SAE630UNSS17400 |
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Description | 1.4542 / AISI 630 / 17-4PH® is a martensitic chromium-nickel-stainless steel, stabilized with niobium. |
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Special properties | Martensitic precipitation hardenable chromium-nickel-copper steel possessing high strength and toughness. Further strengh increments can be obtained by cold forming, followed by a precipitation hardening treatment. |
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Chemical Composition | C%≤ 0.07Si≤ %0.70Mn≤ %1.50P≤ %0.04S≤ %0.015Cr%15.0-17.0Mo%≤ 0.60Ni%3.00-5.00Cu%3.00-5.00Nb%5xC |
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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
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 |
17-4 PH should not be used in the solution treated condition. The strength and corrosion resistance properties of 17-4 hold up well is service temperatures up to 800° F. Fabrication techniques for this steel is similar to those established for the regular stainless grades. 17-4 machines well, has excellent welding characteristics, and forges easily. The combination of good mechanical and processing properties makes this grade adaptable to a wide range of uses.
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