O1/BO1 Tool Steel , Small MOQ
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
Where greater dimensional stability in heat treatment or improved
wear resistance is required, tool steels with higher alloy
contents, such as A2 or D2 should be considered. Typical
applications for O1 tool steel are 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, etc.
ASTM A681 – 08 Standard Specification for Tool Steels Alloy.
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.Heavy sizes should be left to cool in
vermiculite or in other insulating media.
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.Protect against surface decarburization using
controlled atmosphere or by pack-annealing.
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).Stress relieve after rough machining.
PREHEAT PRIOR TO HARDENING: Warm slightly before charging into the
preheat furnace, which should be operating at about
1100°-1200°F.Preheat time in furnace is ¾ Hr. per inch of
thickness. Heating up to temperature as slow as possible.
HARDENING: After thorough preheating, transfer to the hardening furnace,
operating from 1450°-1500°F, depending on the size of the
part.Remove all forging or rolling skin prior to hardening. Temper
immediately after hardening. Allow to cool to 125-150° F before
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. Complete
equalization of temperature throughout the tools is essential for
good results. Recommended temperature is 350-500° F.
Mill′s test certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech.
properties and results of testing.