AISI O1 Tool Steel Heat Treating & Properties
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Family: Tool Steel
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| C | 0.85-1.00 |
| W | 0.40-0.60 |
| Cr | 0.40-0.70 |
| Mn | 1.00-1.40 |
| AISI | O1 |
| P, ≤ | 0.030 |
| S, ≤ | 0.030 |
| V, ≤ | 0.3 |
| Si, ≤ | 0.10-0.50 |
| Steel Name | 95MnWCr5 |
| Designation | 95MnWCr5 |
| Steel (UNS) | O1 (T31501) |
| Steel Name (Material Number) | 95MnWCr5 (1.2825); 100MnCrW4 (1.2510) |
Where to Buy AISI O1 Tool Steel Heat Treating & Properties
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Description
AISI O1 tool steel is a low alloy type cold work tool steel, containing manganese, chromium and tungsten, which must be hardened by oil quenching. It is by far the most widely used tool steel and is produced by almost all tool steel mills. It has high dimensional stability during heat treatment with relatively shallow hardening. It is very safe in hardening as far as reaching the desired hardness. The density of 01 steel is 7.85 g/cm3 (0.283 lb/in3); Rockwell C hardness is 50 HRC; Ultimate tensile strength 1690 MPa (245 ksi), Yield strength 1500 MPa (218 ksi), based on oil quenched at 800°C, tempered at 425°C. O1 steel composition is listed in the table below.