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O-1 Oil Hardening Tool Steel
O-1 is a general purpose oil-hardening tool steel. It has good abrasion resistance and toughness for a wide variety of applications.
Analysis:
| C | CO | CR | MN | MO | NI | P | S | SI | V | W |
|---|
| 0.85 - 1.00 | 0.40 - 0.70 | 1.00 - 1.40 | 0.10 - 0.50 | 0.30 Max. | 0.40 - 0.60 |
Size Availability:
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • StandardApplications:
| Blanking Dies | Drawing Dies | Extrusion Dies |
| Form Cutters | Forming Dies | Gauges - Special |
| Lamination Dies | Master Tools | Molding Dies |
| Paper Knives | Precision Tools | Punches |
| Reamers | Roll Threading Dies | Screw Dies |
| Sub-Press Dies | Taps | Trimming Dies |
Designations:
DIN 1.2510 - GermanyB.S. BO 1 - United Kingdom
ASTM A681 - US
FED QQ-T-570 - US
SAE J437 - US
SAE J438 - US
UNS T31501 - US
AISI O1 Tool Steel - US
| Treatment | Temperature Range | Cooling/Quenching | Notes |
|---|---|---|---|
| Forging | 1825-1925° F | Lime or ashes. | Heavy sizes should be left to cool in vermiculite or in other insulating media. |
| Annealing | 1425-1475° F | Cool slowly in the furnace at a maximum rate of 35° F per hour to approximately 1110° F. | Protect against surface decarburization using controlled atmosphere or by pack-annealing. |
| Stress Relieving | 1200-1250° F | Stress relieve after rough machining | |
| Preheating | 1200-1250° F | Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible. | |
| Hardening | 1450-1500° F | In oil. | Remove all forging or rolling skin prior to hardening. Temper immediately after hardening. Allow to cool to 125-150° F before tempering. |
| Tempering | Complete equalization of temperature throughout the tools is essential for good results. Recommended temperature is 350-500° F. |