MATERIALS USED FOR THREAD CUTTING TOOLS
○Chemical composition of the materials specified in JIS
Classification |
Symbols |
Chemical Composition |
|||||||||
C |
Si |
Mn |
P |
S |
Cr |
Mo |
W |
V |
Co |
||
W typeHSS |
SKH2 |
0.73~0.83 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
─ |
17.00~19.00 |
0.80~1.20 |
─ |
SKH3 |
0.73~0.83 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
─ |
17.00~19.00 |
0.80~1.20 |
4.50~5.50 |
|
SKH4 |
0.73~0.83 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
─ |
17.00~19.00 |
1.00~1.50 |
9.00~11.00 |
|
SKH10 |
1.45~1.60 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
─ |
11.50~13.50 |
4.20~5.20 |
4.20~5.20 |
|
Mo typeHSS |
SKH51 |
0.80~0.90 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.50~5.50 |
5.50~6.70 |
1.60~2.20 |
─ |
SKH52 |
1.00~1.10 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.80~6.20 |
5.50~6.70 |
2.30~2.80 |
─ |
|
SKH55 |
0.85~0.95 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.60~5.30 |
5.70~6.70 |
1.70~2.20 |
4.50~5.50 |
|
SKH56 |
0.85~0.95 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.60~5.30 |
5.70~6.70 |
1.70~2.20 |
7.00~9.00 |
|
SKH58 |
0.95~1.05 |
≦0.5 |
≦0.4 |
≦0.030 |
≦0.030 |
3.50~4.50 |
8.20~9.20 |
1.50~2.10 |
1.70~2.20 |
─ |
|
SKH59 |
1.00~1.15 |
≦0.5 |
≦0.4 |
≦0.030 |
≦0.030 |
3.50~4.50 |
9.00~10.00 |
1.20~1.90 |
0.90~1.40 |
7.50~8.50 |
|
V typeHSS |
SKH53 |
1.10~1.25 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.60~5.30 |
5.70~6.70 |
2.80~3.30 |
─ |
SKH54 |
1.25~1.40 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
4.50~5.50 |
5.30~6.50 |
3.90~4.50 |
─ |
|
SKH57 |
1.20~1.35 |
≦0.4 |
≦0.4 |
≦0.030 |
≦0.030 |
3.80~4.50 |
3.00~4.00 |
9.00~11.00 |
3.00~3.70 |
9.00~11.00 |
Classification |
Symbols |
Usage |
Cross chart |
||
AISI |
VDEH |
ISO |
|||
W typeHSS |
SKH2 |
Tools for general cutting and other kinds of tools. |
T1 |
S18-0-1 |
S1 (HS18-0-1) |
SKH3 |
Tools for high speed heavy cutting and other kinds of tools. |
T4 |
S18-1-2-5 |
S7(HS18-1-1-5) |
|
SKH4 |
Tools for cutting hard-to-machine materials and other kinds of tools. |
T5 |
S18-1-2-10 |
S6(HS18-0-1-10) |
|
SKH10 |
Tools for cutting ultra hard-to-machine materials and other kinds of tools. |
T15 |
─ |
S9 (HS12-1-5-5) |
|
Mo & V type HSS |
SKH51 |
General cutting tools from which toughness is particularly required and other kinds of tools. |
M2 |
S6-5-2 |
S4 (HS6-5-2) |
SKH52 |
|
M3-1 |
─ |
─ |
|
SKH53 |
Tools for cutting high hardness material from which comparatively high toughness is required and other kinds of tools. |
M3-2 |
S6-5-3 |
S5 (HS6-5-3) |
|
SKH54 |
|
M4 |
─ |
─ |
|
SKH55 |
|
M35 |
S6-5-2-5 |
S8 (HS6-5-2-5) |
|
SKH56 |
High speed cutting tools from which comparatively high toughness is required and other kinds of tools. |
M36 |
─ |
─ |
|
SKH57 |
|
─ |
S10-4-3-10 |
S10 (HS10-4-3-10) |
|
SKH58 |
General cutting tools from which toughness is particularly required and other kinds of tools. |
M7 |
S2-9-2 |
S2 (HS2-9-2) |
|
SKH59 |
High speed heavy cutting tools from which comparatively high toughness is required and other kinds of tools. |
M42 |
S2-10-1-8 |
S11(HS2-9-1-8) |
✽HSSE:High-speed tool steel that contains more than 4.5% of Cobalt or 2.6% of Vanadium.
✽HSS:High-speed tool steel that contains more than 4.5% of Cobalt or 2.6% of Vanadium.