# Stainless Steel 17-4 PH

> Stainless that hardens like tool steel: 1,310 MPa in H900 with minimal distortion.

- Category: Stainless Steels → precipitation-hardening
- HTML page: https://fabvector.com/materials/stainless-steel-17-4ph (Portuguese: https://fabvector.com/pt/materials/stainless-steel-17-4ph)
- Price index: $$$$ (1–5, 6061-T6 = $)

## Mechanical properties (typical values, not certified minimums)

| Property | Value |
|---|---|
| Tensile strength | 1310 MPa (H900) |
| Yield strength | 1170 MPa (H900) |
| Hardness | 40–44 HRC (H900) |
| Density | 7.75 g/cm³ |
| Machinability | ★★☆☆☆ (2/5) |
| Corrosion resistance | ★★★★☆ (4/5) |

## When to choose it

When stainless must also be strong: machine near-final in soft Condition A, age at 482 °C with almost no distortion, and finish-grind only critical features — far simpler than quench-and-temper steels.

## When to look elsewhere

Not a 316L substitute in chlorides, and H900 has reduced stress-corrosion resistance (use H1025+ in aggressive environments). For simple corrosion-only duty, 304 costs far less.

## Typical applications

- Pump and valve shafts
- Robot gearbox components
- Aerospace fasteners and fittings
- Loaded surgical instrument hinges

## Compatible surface finishes

- [As-Machined](https://fabvector.com/md/finishes/as-machined)
- [Passivation](https://fabvector.com/md/finishes/passivation)
- [Electropolishing](https://fabvector.com/md/finishes/electropolishing)
- [Bead Blasting](https://fabvector.com/md/finishes/bead-blasting)
- [Brushed Finish](https://fabvector.com/md/finishes/brushed-finish)
- [Polishing](https://fabvector.com/md/finishes/polishing)
- [Vibratory Tumbling](https://fabvector.com/md/finishes/vibratory-tumbling)
- [Laser Marking](https://fabvector.com/md/finishes/laser-marking)
- [PTFE Coating (Teflon)](https://fabvector.com/md/finishes/ptfe-coating)

Industries: aerospace, robotics, oil-and-gas, medical-devices · Instant quote: https://fabvector.com/quote