NACHI-FUJIKOSHI CORP.
Special Steels
Main text
Pre-Harden 4000
| Category | Diameter | Tolerance | Surface defect |
|---|---|---|---|
| Unground(UG) | Greater than Ø2.0 and Ø3.0 or less | +0.040 -0.020 |
0.02 or less |
| Greater than Ø3.0 and Ø6.0 or less | +0.060 -0.020 |
0.05 or less | |
| Greater than Ø6.0 and Ø10.0 or less | +0.08 -0.020 |
0.15 or less | |
| Greater than Ø10.0 and Ø13.0 or less | +0.100 -0.020 |
0.25 or less | |
| Ground | Greater than Ø1.5 and Ø3.0 or less | +0 -0.014 |
Decarb free |
| Greater than Ø3.0 and Ø6.0 or less | +0 -0.018 |
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| Greater than Ø6.0 and Ø10.0 or less | +0 -0.022 |
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| Greater than Ø10.0 and Ø13.0 or less | +0 -0.027 |
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| Precision Drawn | Greater than Ø1.5 and Ø2.5 or less | +0 -0.020 |
|
| Greater than Ø2.5 and Ø3.6 or less | +0 -0.025 |
| Straightness : | 0.5mm/m or less |
| Hardness : | Selection following each steel type and application HRC58-67 |
| Shape : | Flat bars or variant shapes other than round shape are also possible |
| Steel Grade : | High speed tool steels, Stainless steels, Die steels, Bearing steels |