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Click here for a list and general information on some of the material grades we carry in stock. If you don't find the info you are seeking, please call us and we will be happy to help.

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AISI O1:

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Disclaimer: The content of this page is for general information only and is not to be used for engineering or design. The content of this material specification page was compiled from available public sources and authorities on material properties. Although we believe the information to be correct, Metal Stock, Inc. is not responsible for the accuracy of any of the material specifications and only presents this data as general information for our customers.

AISI O1 tool steel is a low alloy cold work tool steel that must be oil-quenched in heat treatment. O1 contains small amounts of manganese, tungsten, and chromium, giving O1 adequate toughness for normal tool & die uses. O1 has deep hardening properties with fine grain structure with unusual toughness. O1 has good response to heat treatment with small dimensional changes. Sizes over approximately 2 inches thick or round may exhibit a lower hardness in the interior. O1 tool steel is available in standard de-carb free rounds, flats and squares, as well as the largest size selection in ground flat stock and drill rod of all the tool steel grades.

AISI O1 conforms to ASTM A681, DIN 1.2510, SAE J437, J438.

General Information about AISI O1:


APPLICATIONS:

AISI O1's typical applications are blanking, forming, and trim dies, gages, slitting cutters, punches, bolster dies, knock-out pins, thread roll dies, bending dies, plastic mold dies, shims, cams, machine ways, stamps, machine parts, jigs, cutter templates, swaging dies, etc.

HEAT TREATING:

FORGING

Heating for forging must be done slowly and uniformly. Soak through at 1800°-1900°F and reheat as often as necessary, stopping work when the temperature drops below 1600°F. After forging, cool slowly in lime, mica, dry ashes or furnace. O-1 should always be annealed after forging.

ANNEALING

Heat slowly to 1400°-1450°F, hold until entire mass is heated through, and cool slowly in the furnace (40F per hour) to about 1000°F, after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.

STRESS RELIEVING

When desirable to relieve the strains of machining, heat slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).

PREHEAT PRIOR TO HARDENING

Warm slightly before charging into the preheat furnace, which should be operating at about 1100°-1200°F.

HARDENING

After thorough preheating, transfer to the hardening furnace, operating from 1450°-1500°F, depending on the size of the part.

QUENCHING

Quench in warm oil and allow to cool in the oil until a temperature of 125°-150°F has been reached, or to where the part can be held in the bare hand, and temper immediately.

TEMPERING

O1 is generally tempered in the range of 300°-600°F. Tempering temperatures and resulting Rockwell C hardness, based on a one inch round sample oil quenched from 1475°F and tempered for 2 hours, are as follows:

TEMPERATURE ROCKWELL C
300 65
350 63
400 62.5
450 61
500 60
600 57



 

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