Apvalus strypai
nuo Ø20mm iki Ø320mm
Description:
Toughening steel
Application:
crankshafts of aircraft engines, driving shafts, large-sized turbine components, gear wheels, rotors and discs of steam turbines.
Chemical composition [%]
| C | Mn | Si | P | S | Cr | Ni | Mo | W | V | Co | Cu |
| 0,32-0,40 | 0,5-0,7 | 0,17-0,37 | max 0,035 | max 0,035 | 1,3-1,7 | 1,3-1,7 | 0,15-0,25 | – | – | – | max 0,3 |
Equivalents
| PN | W. nr | EN | AISI | Russia (GOST) | Other |
| 34HNM | 1.6582 | 34CrNiMo6 | 4337 | 38Ch2N2MA | 16343 |
Processes
| welding | YES | |
| forging | YES | |
| rolling | YES | |
| nitriding | YES | |
| hardening | YES | temp. 820 – 860 [°C] |
| tempering | YES | temp. 540 – 680 [°C] |
Hardness
| after softening | 248 HB |