Apvalus strypai
nuo Ø12mm iki Ø252mm
Juostos ir kvadratai
storis nuo 8mm iki 110mm
Description:
cold work tool steel with high hardenability and hardness; good ductility and shape stability after hardening, good cutting properties
Application:
gauges, measuring tools, long taps, threading dies, reamers, blanking dies, circular knives for paper and leather, milling cutters, punches, shear blades, work-rest blades
Chemical composition [%]
C | Mn | Si | P | S | Cr | Ni | Mo | W | V | Co | Cu |
0,85-0,95 | 1,8-2,1 | 0,15-0,4 | max 0,03 | max 0,03 | max 0,35 | max 0,35 | max 0,2 | max 0,2 | 0,1-0,25 | – | max 0,35 |
Equivalents
PN | W. nr | EN | AISI | Russia (GOST) | Other |
NMV | 1.2842 | 90MnV8 | O2 | 9G2F | K720 |
Processes
welding | NO | |
forging | YES | |
rolling | YES | |
nitriding | NO | |
hardening | YES | temp. 780 – 820 [°C] oil |
tempering | YES | temp. 200 – 280 [°C] |
Hardness
after toughening | 61 HRC |
after softening | 230 HB |