12H18N9TL (10H18N9TL)
various engineering details of operating at temperatures above 700 ° C. Steel heat-resistant up to 750 ° C, heat resistant at temperatures up to 600 ° C, corrosion-resistant, austenitic
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Steels and alloys for castings |
Steel for casting with special properties |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ti, % |
Ni, % |
P, % |
C, % |
S, % |
|---|
| GOST 977-88 |
65.115–73.8 |
0.2–1 |
1–2 |
17–20 |
< 0.7 |
8–11 |
< 0.035 |
< 0.12 |
< 0.03 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
194 |
|
15 |
|
0.75 |
| 100 |
189 |
16.8 |
16 |
0.512 |
0.813 |
| 200 |
176 |
17 |
18 |
0.533 |
0.879 |
| 300 |
165 |
17.4 |
19 |
0.533 |
0.943 |
| 400 |
149 |
17.7 |
21 |
0.542 |
1.006 |
| 500 |
138 |
18.1 |
22 |
0.554 |
1.031 |
| 600 |
133 |
18.5 |
24 |
0.571 |
1.082 |
| 700 |
125 |
18.9 |
25 |
0.58 |
1.123 |
| 800 |
112 |
19.1 |
26 |
0.588 |
1.152 |
| 900 |
|
19.1 |
27 |
0.596 |
1.184 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\psi$$, % |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
Treatment |
|---|
| Castings |
GOST 977-88 |
< 100 |
|
|
441 |
196 |
25 |
32 |
590 |
Hardening of 1050-1100 ° C |
Casting and technological parameters
| linear shrinkage, % |
|---|
| 2.7–2.8 |
Technological Properties
| Weldability |
|---|
| Boundedly welded |
Heat Treatment Modes
| Treatment |
|---|
| Hardening 1050 - 1100 ° C, cooling in water, oil or air |
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
Description of physical characteristics
| 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) |
| $$c\cdot 10^{-3}$$ |
$$\frac{J}{kg\cdot K}$$ |
The specific heat of the material (range 20°C–T) |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
| $$\psi$$ |
% |
Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |
Description of the casting and technological parameters
| Parameter |
Units of measurement |
Description |
| linear shrinkage |
% |
The difference between model dimensions and the model casting |
Designation of types of weldability
| 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 |
|
|