The following table shows the chemical composition of grade 329 stainless steel.
| Element | Content (%) |
|---|---|
| Iron, Fe | 63 |
| Chromium, Cr | 28 |
| Nickel, Ni | 4.5 |
| Manganese, Mn | 2 |
| Molybdenum, Mo | 1.5 |
| Silicon, Si | 1 |
| Carbon, C | 0.10 |
| Phosphorous, P | 0.040 |
| Sulfur, S | 0.030 |
The physical properties of grade 329H stainless steel are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.80 g/cm3 | 0.282 lb/in³ |
The mechanical properties of annealed grade 329H stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 725 MPa | 105000 psi |
| Tensile strength, yield (@0.2%) | 550 MPa | 79800 psi |
| Charpy impact | 54 J | 39.8 ft-lb |
| Elastic modulus | 190 – 210 GPa | 27557 – 30458 ksi |
| Poisson’s ratio | 0.27 – 0.30 | 0.27 – 0.30 |
| Elongation at break (in 50 mm) | 25% | 25% |
| Hardness, Brinell | 230 | 230 |
| Hardness, Knoop (converted from Brinell hardness) | 253 | 253 |
| Hardness, Rockwell B | 96 | 96 |
| Hardness, Rockwell C (converted from Brinell hardness) | 20 | 20 |
| Hardness, Vickers (converted from Brinell hardness) | 242 | 242 |