08H18G8N2T (KO3, 0H18G8N2T)
for the manufacture of welded equipment operating in oxidizing environments at the operating temperature from -50 to 300 ° C.
for the manufacture of welded equipment operating in oxidizing environments at the operating temperature from -50 to 300 ° C.
Standard | Fe, % | Si, % | Mn, % | Cr, % | Ti, % | Cu, % | Ni, % | P, % | C, % | S, % |
---|---|---|---|---|---|---|---|---|---|---|
GOST 5632-72 | 67.46–74 | < 0.8 | 7–9 | 17–19 | 0.2–0.5 | < 0.3 | 1.8–2.8 | < 0.035 | < 0.08 | < 0.025 |
Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$\rho$$, $$\frac{kg}{m^3}$$ | $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ | $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
---|---|---|---|---|---|---|
20 | 212 | 21 | 7700 | 0.71 | ||
100 | 203 | 12.3 | 0.462 | |||
200 | 195 | |||||
300 | 184 | |||||
400 | 177 | |||||
500 | 164 | |||||
600 | 167 | |||||
700 | 146 | |||||
800 | 161 |
Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
---|---|---|---|---|---|---|---|---|---|
Forgings | GOST 25054-81 | < 600 | Longitudinal | 588 | 265 | ||||
The plates | GOST 7350-77 | 590 | 345 | 20 | 590 | Hardening of 980-1020 ° C, cooling water |
Standard | Description |
---|---|
GOST 5632-72 | |
TU 14-1-4687-89 |
Parameter | Units of measurement | Description |
---|---|---|
$$E\cdot 10^{9}$$ | $$MPa$$ | Elastic modulus |
$$\alpha\cdot 10^{6}$$ | $$K^{-1}$$ | Coefficient of thermal (linear) expansion (range 20°C–T) |
$$\varkappa$$ | $$\frac{W}{m\cdot K}$$ | Coefficient of thermal conductivity (the heat capacity of the material) |
$$\rho$$ | $$\frac{kg}{m^3}$$ | The density of the material |
$$c\cdot 10^{-3}$$ | $$\frac{J}{kg\cdot K}$$ | The specific heat of the material (range 20°C–T) |
$$R\cdot 10^{-6}$$ | $$\Omega\cdot m$$ | Electrical resistivity |
Parameter | Units of measurement | Description |
---|---|---|
no limits | Welding is performed without heating and without subsequent heat treatment | |
Boundedly welded | Welding is possible with heating up to 100–120 °C and subsequent heat treatment | |
Difficult to weld | For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing | |
Not applicable for welded structures |