316 is the corrosion resistance champion for marine and chemical environments. 17-4 PH provides 2x the strength through precipitation hardening for aerospace and defense structural applications.
| Property | Stainless Steel 316 | Stainless Steel 17-4 PH |
|---|---|---|
| Tensile Strength | 515 MPa (75 ksi) | 1,070 MPa (155 ksi) |
| Yield Strength | 205 MPa (30 ksi) | 1,000 MPa (145 ksi) |
| Hardness | 217 HB | 36 HRC |
| Density | 8.00 g/cm³ | 7.78 g/cm³ |
| Machinability Rating | 36/100 | 50/100 |
| Thermal Conductivity | 16.3 W/m·K | 18.3 W/m·K |
| Melting Point | 1,370–1,400 °C | 1,400–1,440 °C |
| Tolerance | ±0.01 mm | ±0.01 mm |
| Property | Stainless Steel 316 | Stainless Steel 17-4 PH | Winner |
|---|---|---|---|
| Tensile Strength | 515 MPa | 1,070 MPa | Stainless |
| Corrosion Resistance | Superior | Good | Stainless |
| Machinability | 36/100 | 50/100 | Stainless |
| Weldability | Excellent | Fair | Stainless |
| Heat Treatable | No | Yes | Stainless |
| Cost | ~$3.50/lb | ~$5/lb | Stainless |
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