Specifications for Drill Rod
| Alloy Tool Steel Drill Rod CR-V Alloy Silversteel |
115 Cr V3
Steel Nr. 1.2210
| Properties Cr-V-alloyed tool steel with high strength Maintains blade sharpness Good machinability when spheroidized-annealed Small distortion on oil hardening (possible up to approx. 9mm) |
Chemical Analysis | ||
|---|---|---|---|
| C | 1.15% | ||
| Cr | 0.70% | ||
| V | 0.10% | ||
| Si | 0.25% | ||
| Mn | 0.30% | ||
| Examples of Applications Twist drills and thread taps, reamers, piercing dies, ejectors, arbors, engraving tools, scrapers, files, etc.Is preferably used with silver steel finish in smallest tolerances |
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| Delivery Conditions Spheroidized-annealed, drawn, ground and polished |
Annealed tensile strength Max 750 N/mm2 (220HB) |
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| Heat Treatment | |
|---|---|
| Hot Shaping -> | 1050-850 degrees C |
| Soft Annealing Temperature -> | 710-750 degrees C |
| Hardening Temperature -> | 810-840 degrees C in oil |
| 780-810 degrees C in water | |
| Hardness in HRC | Annealing Temperature in degrees Celsius | |
|---|---|---|
| Nomimal Dimension | Tolerance Zone in mm (external measurements) | ||
|---|---|---|---|
| Over | To | h8 (Steel) | |
| 0 | 1 | 0 | -0.014 |
| 1 | 3 | 0 | -0.014 |
| 3 | 6 | 0 | -0.018 |
| 6 | 10 | 0 | -0.022 |
| 10 | 18 | 0 | -0.027 |
| 18 | 30 | 0 | -0.033 |
| Nomimal Dimension | Tolerance Zone in mm (external measurements) | ||
|---|---|---|---|
| Over | To | h9 (Stainless Steel) | |
| 1 | 3 | 0 | -0.025 |
| 3 | 6 | 0 | -0.030 |
| 6 | 10 | 0 | -0.036 |
| 10 | 18 | 0 | -0.043 |
| 18 | 30 | 0 | -0.052 |
All information is strictly informative