Specification for 18% nickel-cobalt-molybdenum maraging steel forging stock, forgings, bars and parts (1800 MPa: double vaccuum melted)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.015 | ||
| Si | - | 0.10 | ||
| Mn | - | 0.10 | ||
| P | - | 0.010 | ||
| S | - | 0.010 | ||
| Cr | - | 0.25 | ||
| Ni | 17.00 | 19.00 | ||
| Mo | 4.60 | 5.20 | ||
| Ti | 0.03 | 0.60 | ||
| Co | 7.00 | 8.50 | ||
| Al | 0.05 | 0.15 | ||
| B | - | 0.0050 | ||
| Zr | - | 0.02 | ||
| Ca | - | 0.05 |
Specification for 18% nickel-cobalt-molybdenum maraging steel forging stock, forgings, bars and parts (1800 MPa: double vaccuum melted)
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 384 (≥) | 248 (≥) | 34 | 31 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 342 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 127 (≥) | 943 (≥) | 23 | 33 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 224 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 943 | 836 | 186 |
We can customize the production of S.162 grade, contact us for the best solution.
–sales@specificsteel.com