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Box Cutter
A utility knife is a commonly used tool for cutting, carving, and trimming various materials. High-quality utility knives are typically made from premium materials, offering durability and corrosion resistance, allowing them to be used for extended periods without easily wearing out. The most commonly used steel grades are SK85, SK95, and 1085.
| Alloy tool Steel | Chemical Conposion(%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| JIS | Nippon steel | C | Si | Mn | P | S | Cu | Ni | Cr | Mo |
| NKS100 | 0.30 ~ 0.35 | 0.20 ~ 0.40 | 0.40 ~ 0.60 | ≦0.020 | ≦0.010 | 1.35 ~ 1.65 | 1.40 ~ 1.70 | |||
| NKS85 | 0.75 ~ 0.85 | 0.15 ~ 0.35 | 0.40 ~ 0.50 | ≦0.030 | ≦0.030 | ≦0.25 | 0.71 ~ 1.30 | 0.30 ~ 0.50 | 0.10 ~0.20 | |
| NKS56 | 1.10 ~ 1.30 | ≦0.35 | ≦0.50 | ≦0.030 | ≦0.030 | 0.20 ~ 0.50 | ||||
| SKS51 | 0.75 ~ 0.85 | ≦0.35 | ≦0.50 | ≦0.030 | ≦0.030 | ≦0.25 | 1.30 ~ 2.00 | 0.20 ~ 0.50 | ||
| SKS5 | 0.75 ~0.85 | ≦0.35 | ≦0.50 | ≦0.030 | ≦0.030 | ≦0.25 | 0.70 ~ 1.30 | 0.20 ~ 0.50 |
| Alloy tool Steel | Hardness | Tensile Strength (N/mm²) | ||
|---|---|---|---|---|
| JIS | Nippon steel | HV | HRC | |
| NKS100 | ~ 240 | ~ 765 | ||
| NKS85 | ~ 200 | ~ 635 | ||
| NKS56 | ~ 200 | ~ 635 | ||
| SKS51 | ~ 210 | ~ 670 | ||
| SKS5 | ~ 210 | ~ 670 |