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O1 Tool Steel Technical Data

DeCarb Free Tool Steel Bar
AISI 0-1

This alloy is one of the Cold Work, oil hardening type tool steels. It is relatively inexpensive containing small amounts of manganese, tungsten and chromium. Hardening by oil quench minimizes distortion and cracking. O1 alloy can be readily formed in the annealed condition by conventional methods. 0-1 is an oil-hardening, non-deforming tool steel which can be hardened at relatively low temperatures. Tools and dies made from 0-1 will have good wearing qualities since the tungsten and higher chromium content gives improved wear resistance over the straight manganese grades.

Carbon	0.85 - 1
Chromium	0.4 - 0.6
Iron	Balance
Manganese	1 - 1.4
Phosphorus	0.03 max
Silicon	0.5 max
Sulphur	0.03 max
Tungsten	0.4 - 0.6
Vanadium	0.3 max

Heat Treatment Data

Forging:
- Start forging at: 1800-1950°F (982-1066°C)
- Do not forge below: 1550°F (843°C)
Normalizing:
- 1600°F (871°C)
Annealing:
- Temperature: 1400-1450°F (760-788°C)
- Rate of cooling, max. per hour: 40°F (22°C)
- Typical annealed hardness, Brinell: 183-212
Hardening:
- Rate of heating: Slowly
- Preheat temperature: 1200°F (649°C)
- Hardening temperature: 1450-1500°F (788-816°C)
- Time at temperature, minutes: 10-30
- Quenching medium: 0
Tempering:
- Tempering temperature 350-500°F (177-260°C)
- Approx. tempered hardness, Rockwell C: 57-62
Wear Resistance: Medium
Toughness: Medium
Resistance to Softening Effect of Elevated Temperature: Low
Depth of Hardening: Medium
Machinability: High
Grindability: High
Distortion in Heat Treating: Low
Safety in Hardening: Medium to High
Resistance to Decarburization: High

Fasteners
Self Drilling Screws	Carriage Bolts
Self Tapping Screws	Hex Nuts
Set Screws	Lag Screws
Sheet Metal Screws	Wood Screws
Washers	Spring Pins
Threaded Rods	Dowel Pins
Socket Head Shoulder Screw	Taper Pins
Socket Head Cap Screws	Shafts
Metal/Plastics Spacers-Standoffs	Felt Sheets, Discs, Strips, Cords
Machine Screws	Drill Bits
U Channels	Circuit Breakers
Eyebolts	Spur Gears
Worm Gears	Miter Gears
Gear Racks	Helical Gears
Springs	Tapes- Skived, Adhesive Backed
Exhaust, Duct, Air, Vacuum Hose	Washers