Designation
| Name |
The value |
| Designation GOST Cyrillic |
25ГСЛ |
| Designation GOST Latin |
25GCL |
| Transliteration |
25GSL |
| By chemical elements |
25MnС |
Description
25ГСЛ steel is used: for the manufacture of castings of blades of hydraulic turbines, gear rims and wheels, bushings, sectors, columns, details of welded-cast structures with a large amount of welding.
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Cu |
|
0.22-0.28 |
≤0.3 |
≤0.3 |
1-1.3 |
≤0.3 |
0.6-0.8 |
≤0.3 |
≤0.3 |
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, % |
d |
KCU, kJ/m2 |
HB, MPa |
| Annealing in air 85-900 °C + vacation at 650 °C, air cooling |
| 20 |
≥560 |
≥710 |
- |
≥43 |
≥860 |
207 |
| Normalization at 900-920 °C + vacation at 580-600 °C, air cooling |
| 100 |
≥245 |
≥470 |
≥18 |
≥30 |
≥290 |
123-149 |
| Normalization at 900-920 °C, air cooling |
| 20 |
≥350 |
≥540 |
- |
≥32 |
≥650 |
170 |
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 |
| d |
Elongation after rupture |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Technological properties
| Name |
The value |
| Weldability |
welded without any restrictions. Welding methods: SMAW, ADS under gas protection electroslag welding |
| Склонность к отпускной хрупкости |
tend not |
| Flock-sensitive sensitivity |
not sensitive |
| Machinability |
In a normalized state in HB 156 and blower SB=510 MPa Kn TV.SPL.=1.0 Kn b.St.=0.9 |
