JIS grade standard compatibility table
Compatibility table for JIS classification symbol
■ Compatibility table between our grade and JIS classification symbol
| Division | Our grade | JIS grade symbol | |
| For wear-resistance and impact resistance tools | H1 | VM-10 | |
| G1 | VM-20 | ||
| G2 | VM-30 | ||
| G3 | VM-40 | ||
| G4 | VC-40 | ||
| G5 | VC-50 | ||
| TB6 | VU-60 | ||
| TB7 | VU-70 | ||
| G8 | VU-80 | ||
| Fine grain cemented carbide | KD05 | VF-20 | |
| KD10 | VF-30 | ||
| KD20 | VF-40 | ||
| KD30 | VF-40 | ||
| KD40 | VF-50 | ||
| KD50 | VF-70 | ||
| Ultrafine grain cemented carbide | EF01 | VF-10 | |
| EF05 | VF-10 | ||
| EF10 | VF-20 | ||
| EF20 | VF-40 | ||
| Cemented carbide for electromagnetic steel sheet processing | EX20 | VC-40 | |
| EW10 | VM-30 | ||
| EW25 | VM-40 | ||
| EW40 | VM-50 | ||
| For stainless steel | KX01 | VF-20 | |
| For stamping of pure iron and copper | MC20 | VC-40 | |
| Corrosion-resistance/for EDM | ME40 | VC-50 | |
| For EDM | Crack-resistance | A10W | VM-30 |
| Anti-corrosive | WD20 | VF-40 | |
| Non-magnetic and anti-corrosive | KN10 | NF-30 | |
| KN20 | NF-40 | ||
| KN30 | NF-40 | ||
| KN40 | NF-50 | ||
| For high wear-resistant | SS13 | VF-10 | |
| SS15 | VF-10 | ||
| For cutting tools | KW3 | VM-30 | |
Compatibility table for JIS classification symbol
■ Table1 Classification method of 1st digit
| Mark | Binder phase elements |
| V | Co |
| R | Co/Ni |
| N | Ni |
■ Table2 Classification method of 2nd digit
| Mark | WC average grain size |
| F | Under 1.0 |
| M | 1.0 or over, under 2.5 |
| C | 2.5 or over, under 5.0 |
| U | 5.0 or over |
■ Table3 Classification method of 4th and 5th digit
| Mark | Nominal hardness |
| 10 | 93 or over |
| 20 | 92 or over, under 93 |
| 30 | 91 or over, under 92 |
| 40 | 89 or over, under 91 |
| 50 | 87 or over, under 89 |
| 60 | 85 or over, under 87 |
| 70 | 82 or over, under 85 |
| 80 | Under 82 |
*Tables 1 to 3 are quoted from JIS B 4054:2020.
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