Designation
| Name |
The value |
| Designation GOST Cyrillic |
20ХГСНДМЛ |
| Designation GOST Latin |
20XGCHDML |
| Transliteration |
20HGSNDML |
| By chemical elements |
20CrMnСНCuMo |
Description
20ХГСНДМЛ steel is used: for the manufacture of castings, brackets and other parts, which are requirements of high strength and sufficient toughness.
Note
Alloy structural steel.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
TU 48-43-654-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Cu |
Ti |
Mo |
|
0.18-0.24 |
≤0.045 |
≤0.05 |
0.9-1.3 |
0.6-0.9 |
0.9-1.2 |
1.1-1.5 |
0.4-0.6 |
0.03-0.07 |
0.1-0.15 |
Chemical composition is not verified by NTD. Total verified brands for chemical compounds: 2906 of 3316.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Annealing in air from 910-930 °C + vacation at 640-660 °C, air cooling |
| 100 |
≥500 |
≥650 |
≥12 |
≥20 |
≥400 |
207-269 |
| Casting a cross section of 30 mm. Normalization at 920-930 °C |
| - |
760-790 |
1050-1100 |
9-12 |
26-33 |
- |
321-340 |
| - |
790-860 |
990-1020 |
6-9 |
25-34 |
- |
- |
| - |
790-880 |
1000-1030 |
9-12 |
18-33 |
- |
- |
| - |
790-850 |
1070-1130 |
9-15 |
12-37 |
- |
- |
| - |
740-820 |
940-980 |
4-13 |
16-48 |
- |
- |
| - |
620-640 |
680-710 |
9-13 |
44-57 |
- |
- |
| Casting a cross section of 30 mm. Normalization at 920-930 °C, cooling in water + vacation at 640-660 °C, cooling in water |
| - |
710-720 |
810-850 |
11-14 |
21-41 |
- |
255-285 |
| - |
660-710 |
760-830 |
10-13 |
22-42 |
- |
- |
| - |
630-650 |
760-780 |
9-12 |
19-38 |
- |
- |
| - |
610-650 |
710-790 |
7-13 |
12-31 |
- |
- |
| - |
560-600 |
670-710 |
9-14 |
7-17 |
- |
- |
| - |
485-520 |
510-540 |
6-15 |
26-56 |
- |
- |
| Casting a cross section of 30 mm. Normalizing at 930-950 °C + quenching in water from 910-930 °C + vacation at 220-250 °C, air cooling |
| - |
1060-1150 |
1450-1510 |
5-7 |
13-25 |
- |
445-477 |
| - |
1150-1280 |
1340-1520 |
3-7 |
9-30 |
- |
- |
| - |
1110-1300 |
1360-1520 |
1-6 |
8-15 |
- |
- |
| - |
1080-1190 |
1310-1420 |
3-14 |
10-44 |
- |
- |
| - |
900-1070 |
1130-1270 |
6-12 |
22-53 |
- |
- |
| - |
690-810 |
750-880 |
8-17 |
39-73 |
- |
- |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Physical characteristics
| Temperature |
Е, HPa |
G, HPa |
r, kg/m3 |
l, W/(m · °C) |
R, Mr. · m |
a, 10-6 1/°C |
С, J/(kg · °C) |
| 0 |
209 |
82 |
7830 |
25 |
433 |
- |
- |
| 20 |
209 |
- |
7830 |
25 |
433 |
- |
- |
| 100 |
201 |
78 |
- |
27 |
467 |
11 |
491 |
| 200 |
193 |
76 |
- |
28 |
531 |
118 |
500 |
| 300 |
184 |
71 |
- |
30 |
605 |
125 |
521 |
| 400 |
176 |
67 |
- |
32 |
705 |
129 |
533 |
| 500 |
169 |
64 |
- |
33 |
835 |
133 |
554 |
| 600 |
153 |
58 |
- |
33 |
967 |
135 |
584 |
| 700 |
133 |
50 |
- |
31 |
1127 |
136 |
622 |
| 800 |
128 |
48 |
- |
28 |
1175 |
11 |
689 |
| 900 |
- |
- |
- |
28 |
1205 |
11 |
689 |
| 1100 |
- |
- |
- |
- |
- |
121 |
685 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
Limited weldability. Electrodes SSSI-13/55 and 48Н-1. Require subsequent heat treatment. |
