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Technical Data Sheet
LPBF · Stainless Steel
17-4PH Stainless Steel
UNS S17400 · 1.4542 · AISI 630 · AMS 5643
Precipitation-hardening martensitic stainless — high strength and hardness with good corrosion resistance. Heat-treatable (H900–H1150) for structural brackets, valve bodies and hard-wearing tooling.
LPBF
17-4PH
17-4PH~1310 MPaUTS (H900)
~1170 MPaYield Rp0.2 (H900)
40-44 HRCHardness (H900)
7.75 g/cm³Density
Material overview
17-4PH is a precipitation-hardening martensitic stainless steel that combines high strength and hardness with good corrosion resistance. Printed by LPBF it reaches over 99.5% density; a solution and age treatment (H900–H1150) develops strength past 1300 MPa and 40–44 HRC. It is the go-to alloy where 316L is not strong enough — structural brackets, valve and pump bodies, shafts and hard-wearing tooling. Magnetic; readily machined, passivated or polished after printing.
Highlights
- Density: >99.5% — near-wrought
- Strength: ages past 1300 MPa (H900)
- Hardness: 40–44 HRC after ageing
- Heat-treatable: H900–H1150 conditions
Ideal applications
Aerospace bracketsValve & pump bodiesTooling & fixturesMarine hardwareShafts & fittingsHigh-strength housings
Mechanical properties
| Property | Value | Unit |
|---|---|---|
| Ultimate tensile strength (H900) | ~1310 | MPa |
| Yield strength Rp0.2 (H900) | ~1170 | MPa |
| Elongation at break (H900) | ~10 | % |
| Hardness (H900) | 40-44 | HRC |
| Young’s modulus | ~197 | GPa |
| Layer thickness | 20-60 | µm |
| As-built roughness Ra | 6-12 | µm |
Physical & thermal
| Property | Value | Unit |
|---|---|---|
| Density | 7.75 | g/cm³ |
| Melting range | ~1400-1440 | °C |
| Thermal conductivity | ~17 | W/m·K |
| Thermal expansion | ~10.8 | µm/m·K |
| Powder PSD | 15-45 | µm |
| Composition | Fe·Cr15-17·Ni3-5·Cu3-5·Nb0.15-0.45 | wt% |
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Property data per the material manufacturer’s technical datasheet and Carpenter Additive / industry references (on file). Values are indicative for LPBF in the aged (H900) condition and may vary with machine, parameters, orientation and heat treatment — not a guaranteed specification or a legally binding MSDS; SDS available on request. © 2019–2026 Additive Plus · All rights reserved. AO Metal is our trademark.