N18K9M5T
For products with high strength with sufficient ductility and toughness, high resistance to small plastic deformations, brittle and fatigue failure, used in engineering, instrument making and tool industry martensitic-aging steel.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | High strength high alloy structural steel |
Chemical composition
| Standard | Fe, % | Co, % | Ti, % | Ni, % | Al, % | C, % | Mo, % |
|---|---|---|---|---|---|---|---|
| GOST 2591-2006 | 67.97–71.17 | 8.5–9.5 | 0.5–0.8 | 15–16 | < 0.2 | < 0.03 | 4.6–5.5 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy | GOST 2591-2006 | 200–2000 | 1850 | 50 | 0.4–0.5 | 10–11 | Hardening 840-860 ° С Vacation (aging) 500 ° С, 5-6 hours |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| GOST 2591-2006 | 50–52 |
Analogues
| Germany | USA |
|---|---|
| X 3 NiCoMoTi 18-9-5 | 18 MAR 300 |
Standards
| Standard | Description |
|---|---|
| GOST 2591-2006 | GOST 2591-2006 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Co | % | Cobalt |
| Ti | % | Titan |
| Ni | % | Nickel |
| Al | % | Aluminium |
| C | % | Carbon |
| Mo | % | Molybdenum |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
| $$\psi$$ | % | Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |