Analyses chimiques
| QUALITE |
C% |
MN% |
SI% |
P% |
S% |
CR% |
AL% |
TI% |
B% |
| AVZ |
0.18-0.24 |
1.50-1.90 |
0.50-0.80 |
0.030 |
0.030 |
- |
- |
- |
- |
| 20MCB5 |
0.18-0.22 |
1.10-1.30 |
0.15-0.35 |
0.030 |
0.030 |
0.20-0.50 |
0020-0050 |
0030-0050 |
0015-40 |
| 23MCB5 |
0.20-0.25 |
1.10-1.30 |
0.15-0.35 |
0.030 |
0.030 |
0.20-0.50 |
0020-0050 |
0030-0050 |
0015-40 |
| 28MCB5 |
0.25-0.30 |
1.10-1.30 |
0.15-0.35 |
0.030 |
0.030 |
0.20-0.50 |
0020-0050 |
0030-0050 |
0015-40 |
| 30MCB5 |
0.28-0.32 |
1.10-1.30 |
0.15-0.35 |
0.030 |
0.030 |
0.20-0.50 |
0020-0050 |
0030-0050 |
0015-40 |
Caractéristiques mécaniques à l'état trempé et
revenu
| QUALITE |
CHARGE
UNITAIRE
DE RUPTURE
N/mm2 |
CHARGE DE
D'ECARTEMENT
N/mm2min |
ALLONGEMENT
%min |
RESILIENCE
KV
20ºC J min
|
| AVZ |
950-1100 |
785 |
8 |
27 |
| 20 MCB5 |
700-900 |
550 |
13 |
27 |
| 23 MCB5 |
750-1000 |
580 |
10 |
27 |
| 28 MCB5 |
1100-1500 |
980 |
10 |
27 |
| 30 MCB5 |
1250-1600 |
1060 |
10 |
27 |
Traitement thermique
| QUALITE |
TREMPE |
REVENU
DETENTE |
MOYEN DE
TREMPE |
| AVZ |
750° |
-/450° |
EAU |
| 20 MCB5 |
900° |
200/450° |
EAU |
| 23 MCB5 |
880° |
200/450° |
EAU |
| 28 MCB5 |
860° |
200/450° |
EAU |
| 30 MCB5 |
860° |
200/450° |
EAU/HUILE |
|
