Designation
| Name |
The value |
| Designation GOST Cyrillic |
20ХЛ |
| Designation GOST Latin |
20XL |
| Transliteration |
20HL |
| By chemical elements |
20Cr |
Description
20ХЛ steel is used: for the manufacture of castings 1, 2, 3 parts of pipe fittings high tensile strength in Northern performance test notch toughness at the operating temperature KCU-50≥200 kJ/m2 (2,0 kgf·m/cm2), the working environment temperature -50 to +450 °C without limitations nominal operating pressure.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
OST 26-07-402-83, TU 4112-091-00220302-2006, ST ЦКБА 014-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
| ST ЦКБА 014-2004 |
0.15-0.25 |
≤0.035 |
≤0.04 |
0.3-1.03 |
0.51-1.5 |
0.15-0.62 |
≤0.8 |
Rest |
Fe is the basis.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d |
y, % |
KCU, kJ/m2 |
| Casting parts of pipe fittings. Normalization at 850-900 °C, air cooling + vacation at 650 °C, air cooling KCU+20/-50 |
| ≥250 |
≥450 |
≥18 |
≥30 |
≥600/200 |
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 |
| d |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
