MH51 MH55 MH64 MH8 MH7 : °í¼Óµµ°ø±¸° (High Speed Tool Steel)
1. À¯»ç±Ô°Ý
|
MH51
|
MH55
|
MH64
|
MH8
|
MH7
|
JIS
|
SKH51
|
SKH55
|
-
|
SKH57mod.
|
SKH58
|
AISI
|
M2
|
M35
|
-
|
-
|
M7
|
VDEh
|
S6-5-2
|
S6-5-2-5
|
-
|
S10-4-3-10
|
S2-9-2
|
2. ÈÇмººÐ (%)
|
MH51
|
MH55
|
MH64
|
MH8
|
MH7
|
C
|
0,80-0.90
|
0.80-0.90
|
1.10
|
1.20
|
1.00
|
Si
|
0.40max
|
0.40max
|
0.3
|
0.3
|
0.3
|
Mn
|
0.40max
|
0.40max
|
0.3
|
0.3
|
0.3
|
Cr
|
3.80-4.50
|
3.80-4.50
|
4.2
|
4.3
|
4.2
|
Mo
|
4.50-5.50
|
4.80-6.20
|
9.0
|
5.5
|
9.0
|
W
|
5.50-6.70
|
5.50-6.70
|
2.5
|
7.5
|
1.8
|
V
|
1.60-2.20
|
1.70-2.30
|
1.9
|
3.0
|
2.0
|
Co
|
-
|
4.50-5.50
|
8.0
|
12.5
|
-
|
NOTE; 1) P;0.030%max 2)S;0.030%max 3)Cu;0.25max 4) Ni;0.25%max
3. ´ÜÁ¶¿Âµµ (C)
MH51
|
MH55
|
MH64
|
MH8
|
MH7
|
1150-950
|
1180-950
|
1180-950
|
1180-950
|
1150-950
|
4. ¿Ã³¸®¿Âµµ(oC)
|
MH51
|
MH55
|
MH64
|
MH8
|
MH7
|
Annealing
|
800-880
|
800-880
|
800-880
|
800-880
|
800-880
|
Hardening
|
1160-1220
|
1180-1230
|
1170-1210
|
1180-1230
|
1170-1210
|
Quenching
|
oil,salt
|
oil,salt
|
oil,salt
|
oil,salt
|
oil,salt
|
Tempering
|
540-570
|
530-570
|
540-580
|
540-580
|
540-580
|
5. °æµµ
|
MH51
|
MH55
|
MH64
|
MH8
|
MH7
|
HB
|
Annealed
|
255max
|
257max
|
285max
|
285max
|
248max
|
HRC
|
Tempered
|
62min
|
63min
|
64min
|
64min
|
64min
|
ÀϺ» DAIDO STEEL |