25ChGT, 25HGT, 1.8401, 30MnCrTi4, 30ChGT, 30HGT – case-hardening steel according to GOST 4543-71
Table of content:
| Standard | Grade | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||||||||||||
| C: | Si: | Mn: | P: | S: | Cr: | Mo: | Ni: | Ti: | Cu: | N: | W: | V: | |||||
| GOST | 25ChGT - 25HGT | ||||||||||||||||
| 0.22-0.29 | 0.17-0.37 | 0.8-1.1 | <0.035 | <0.035 | 1.0-1.3 | <0.15 | <0.3 | 0.03-0.09 | <0.3 | <0.008 | <0.05 | <0.2 | |||||
| GOST | 30ChGT - 30HGT | ||||||||||||||||
| 0.24-0.32 | 0.17-0.37 | 0.8-1.1 | <0.035 | <0.035 | 1.0-1.3 | <0.15 | <0.3 | 0.03-0.09 | <0.3 | <0.008 | <0.05 | <0.2 | |||||
| DIN | 30MnCrTi4 / 1.8401 | ||||||||||||||||
| 0.25-0.35 | 0.15-0.35 | 0.9-1.2 | <0.025 | <0.025 | 0.8-1.0 | 0.15-0.30 | - | - | - | - | - | - | |||||
25HGT, 1.8401, 30MnCrTi4, 30HGT – description
Case-carburizing steel 25HGT has greater amount of carbon than similar alloy 18HGT. The grade shows higher hardness after heat treatment than 18HGT. The rest of the alloy additions are similar.
Applications
This alloy is widely used for:
- Gears
- Transmission shafts
Physical and mechanical properties
A very ductile and shock-resistant steel. Hard top layer after carburizing.
- Yield strength: >980 MPa
- Tensile strength: >1270 MPa
- Elongation: 10%
- Impact Value KCU, 20°C: 69 J/sm2
- Hardness after tempering: <217HB
We can deliver:
Replacements, equivalents and other designations:
25ChGT, 25ChGT-Sh, 25ChGTA, 25ХГТ, 25ChGTA-Sh, 30ChGT, 30ChGT-Sh, 30CrMnTi, 1.8401, 30MnCrTi4, 30ХГТ