 |
|
Hot Work Tool Steels
|
|
Chemical Composition and Heat Treatment
|
|
DAIDO
BRAND |
Equivalent
to |
Chemical
Composition (%)
|
|
JIS
|
AISI
|
VDEh |
C |
Si |
Mn |
Ni |
Cr |
Mo |
W |
V |
Co |
| DHA1 |
SKD61 |
H13 |
X40CrMoV51 |
0.32-0.42 |
0.80-1.20. |
0.50 max. |
- |
4.50-5.50 |
1.00-1.50 |
- |
0.80-1.20 |
- |
| DH2F |
- |
- |
- |
0.32-0.42 |
1.5 max. |
1.5 max. |
- |
4.50-5.50 |
1.00-1.50 |
- |
0.40-1.20 |
(*1) |
| DH31 |
- |
- |
- |
(Patent
Pending) |
| DH32 |
- |
- |
- |
(Patent
Pending) |
| GFA |
SKT4/mod. |
- |
56NiCrMoV7 |
0.55 |
0.2 |
1.0 |
1.65 |
1.1 |
0.5 |
- |
0.13 |
- |
|
|
DAIDO
BRAND |
Forging
Temperature
(℃) |
Heat Treatment(℃) |
Hardness |
Annealing
Temperature |
Hardening
Temperature |
Quenching
Medium |
Tempering
Temperature |
Annealed
HB |
Tempered
HRC |
| DHA1 |
1100-900 |
820-870 |
1000-1050 |
Air |
550-650 |
229
max. |
53
max. |
| DH2F |
1100-900 |
Prehardened Steel (37-41 HRC) |
| DH31 |
1100-900 |
820-870 |
1000-1050 |
Air |
550-650 |
235
max. |
55
max. |
| DH32 |
1100-900 |
820-870 |
1000-1050 |
Oil,
Air |
550-650 |
229
max. |
55
max. |
| GFA |
1050-850 |
760-810 |
(850-900) |
(Oil) |
(600-650) |
241
max. |
- |
|
|
|
|
|
