Maraging Steel C-350
Material Data Sheet
Maraging steel is produced by vacuum arc re-melting to provide a lower impurity level and high strength. Maraging C350 in the aged condition boasts nearly 350 ksi tensile (2413 MPa) with similar yield results, a nominal 7% elongation, and an above-average level of toughness. The alloy retains its strength up to 450°C and good notch impact is maintained down to minus 50°C and below. This material may be nitrided.
Maraging C350 is usually supplied in the annealed condition where the microstructure consists of fine martensite before final heat treatment. It is then maraged (precipitation hardened) to achieve final properties, employing a relatively low temperature that results in the required combination of high strength and toughness. The alloy has a density of 8.02 g/cc.
Maraging steels are exceptionally stable during both annealing and aging, offering predictable, uniform shrinkage on all dimensions. This distortion-free (nonwarping) characteristic is a significant advantage over many other high-strength steels.
Maraging steels are usually machined in the annealed condition, however, they can be machined in the maraged condition. Components can be machined close to finished dimensions as the low temperature maraging treatment results in minimal distortion. In addition, the small contraction of approximately 0.05% due to maraging results in excellent dimensional stability.
Maraging C350 steel is readily weldable
| Chemistry | Content(%) |
|---|---|
| Iron, Fe | 63.0 |
| Nickel, Ni | 18.5 |
| Cobalt, Co | 12.0 |
| Molybdenum, Mo | 4.8 |
| Titanium, Ti | 1.4 |
| Aluminum, Al | 0.1 |
| Silicon, Si | 0.1 |
| Sulfur, S | 0.01 |
| Manganese, Mn | 0.1 |
| Carbon, C | 0.03 |
| Zirconium, Zr | 0.01 |
| Phosphorous, P | 0.01 |
| Boron, B | 0.003 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength, Ultimate | 1140 MPa | 165000 psi |
| Tensile Strength | 827 MPa | 120000 psi |
| Elongation at Break | 18% | 18% |
| Reduction of Area | 70% | 70% |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Bulk Modulus | 160 GPa | 23200 ksi |
| Poissons Ratio | 0.30 | 0.30 |
| Shear Modulus | 77.0 GPa | 11200 ksi |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength, Ultimate | 1140 MPa | 165000 psi |
| Tensile Strength | 827 MPa | 120000 psi |
| Elongation at Break | 18% | 18% |
| Reduction of Area | 70% | 70% |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Bulk Modulus | 160 GPa | 23200 ksi |
| Poissons Ratio | 0.30 | 0.30 |
| Shear Modulus | 77.0 GPa | 11200 ksi |
Grades C350 Maraging Steel is available in the following forms:
- Tooling
- Load cell
- Couplings
- Landing gear
- Missile casings
- Ordnance mounting blocks
- Jet engine and helicopter driveshafts
- High-performance motorsport components
