Steel 20ХГСНДМЛ

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.