Available Shapes
O1 Tool Steel
O1 grade steel is an oil-hardening, non-deforming tool steel. It is considered to be a “non-shrinking” steel and it can be hardened to a Rockwell Range of C 65 through use of relatively low temperatures. Tools and dies made from O1 will have good wearing qualities since the tungsten and higher chromium content gives improved wear resistance over the straight manganese grades. O1 is typically selected for its good combination of strength, hardness and wear resistance. O-1 is available in a standard finish as well as a flat ground stock and drill rod. These are precision ground to a fine surface.
Related Specifications
AISI ASTM A681 DIN 17350 BS EN ISO 4957
Applications
O1 Typical Analysis
Ground Flat Stock
Forging
Annealing
Stress Relieving
Hardening
Applications
Typical Applications for O-1 Tool Steel include:
Blanking Dies
Bushings
Forming Dies
Master Tools
Forming Rolls
Gauges
Trim Dies
O1 Typical Analysis
| Carbon | 0.95% | Manganese | 1.25% |
| Chromium | 0.50% | Tungsten | 0.50% |
| Vanadium | 0.20% |
Ground Flat Stock
Precision ground flat stock / gauge plate can be supplied in O1 tool steel. Stocks are available in a wide range of sizes. Metric sizes are supplied in 500mm and 1000mm lengths. Imperial sizes are supplied in 18″ and 36″ lengths. Subject to size suitability and availability non standard sizes and lengths can be produced in approximately 2 to 3 weeks.
Forging
Forging of O1 steels can be performed at 1038°C (1900°F) down to 857°C (1575°F) but not below 816°C (1550°F).
Annealing
Annealing should be performed at 788°C (1450°F) followed by slow furnace cool at a temperature less than 4°C (40°F) per hour.
Stress Relieving
When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. Heat the O1 steel component carefully to 670-700°C, soak well and allow to cool in air.
Hardening
When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening. Heat the O1 steel component carefully to 670-700°C, soak well and allow to cool in air.
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