Cutting tools performance mainly depends on raw material composition, heat-treat process and precision tolerance. Among them material is the most important factor.Different countries developed their own steel codes.
Following is a data sheet that show major steel codes.
|
China |
USA |
Japan |
Germany |
ISO |
character |
HB |
Temper temperature |
Usage |
GB |
ASTM |
JIS |
DIN |
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Carbon Steel |
T7 |
W1-7 |
SK7 |
C70W2 |
TC70 |
regular tensile and hardness |
87 |
800-820 |
chisel, hack saw, |
T8 |
W1-71/2 |
SK6 |
C80W1 |
TC80 |
good harness and abrasive |
87 |
780-800 |
route bits, axle, hack saw |
|
T8Mn |
W1-8 |
SK5 |
C85W |
1 |
good harness and abrasive |
87 |
780-800 |
hack saw, pouch |
|
T9 |
W1-81/2 |
SK5 |
1 |
TC90 |
good harness and abrasive |
92 |
760-780 |
wood working cutting tools |
|
T10 |
W1-91/2 |
SK4 |
1 |
TC105 |
high hardness and abrasive |
97 |
760-780 |
wood working cutting tools |
|
T11 |
W1-101/2 |
SK3 |
C105W2 |
1 |
high hardness and abrasive |
07 |
760-780 |
hand use taps and die, scrapers, files |
|
T12 |
W1-111/2 |
SK2 |
1 |
TC120 |
high hardness and abrasive |
07 |
760-780 |
hand use taps and die |
|
T13 |
W1-121/2 |
SK1 |
1 |
TC140 |
high hardness and abrasive |
17 |
760-780 |
scrapers, files, gauge and so on |
|
high speed steel |
W18Cr4V |
T1 |
SKH2 |
1 |
1 |
high hardness and red hardness |
55 |
1270-1285 |
tool bits milling cutters |
W6Mo5Cr4V2 |
M2 |
SKH51 |
1 |
1 |
high hardness and red hardness |
55 |
1210-1230 |
tool bits milling cutters |
|
W9Mo3Cr4V |
1 |
1 |
1 |
1 |
high hardness and red hardness |
55 |
1220-1240 |
tool bits milling cutters lathe drill bits reamer |
|
W6Mo5Cr4V2Al |
1 |
1 |
1 |
1 |
super hardness, its red hardness is better than W6Mo5Cr4V2 |
69 |
1230-1240 |
tool bits, milling cutters |
|
W2Mo9Cr4V2 |
M7 |
1 |
1 |
1 |
super red hardness |
1 |
1 |
tool bits, milling cutters |
|
W6Mo5Cr4V2Co5 |
M35 |
1 |
1 |
1 |
best red hardness |
1 |
1 |
tool bits, milling cutters |
|
W2Mo9Cr4VCo8 |
M42 |
1 |
1 |
1 |
best red hardness |
1 |
1 |
tool bits, milling cutters |
Quality is our factory's life. We based our quality control on standard ISO9001 system. With fully inspection equipments and professional workers, we control the quality from raw material to finished products. We conduct cutting test for each dispatch before shipment.
Customer comments are our valuable sources of quality information. Every complaint will be processed at once. Also we give customer complete compensation if losses arise from our producs' quality.
Follows are our regular quality control diagram.
raw material quality control |
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physical -chemical analysis |
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chemical test |
physical test (low multiple, high multiple) |
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production process |
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quality control during production process |
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operator self check |
checker first check |
checker tour check |
checker final confirm |
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finished product |
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spot check by checker |
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static confirm |
cutting test |
tool life test |
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packing |
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packing check |
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put into warehouse for shipment |