O1 Oil Hardening Tool Steel

O1 tool steel for sale,  1.2510 steel

AISI O1 (UNS T31501) steel is a kind of cold work, oil hardening type of tool steel and it is the most widely tool steel. It has good abrasion resistance and toughness for a wide variety of applications such as stamping dies, blanking dies, bending dies, drawing dies, punching dies and other hardware dies.

O1 Tool Steel Designations:


DIN 1.2510


SAE J437

SAE J438

Available forms:

O1 bar

O1 plate

O1 block

Chemistry composition:

0.85 – 10.4 – 0.61 – 1.40.5 max0.03 max0.03 max0.4 – 0.60.3 maxBalance

O1 Tool Steel Physical and Mechanical Properties:

Density: 8.67kg/cm3

Thermal expansion: 9.7 x 10-6/°C   at 20-200°C more

Hardness, Rockwell C: 57-62 HRC.

Elastic modulus: 190-210 GPa


Blanking Dies, Drawing Dies, Extrusion Dies, Form Cutters Forming Dies, Master Tools, Molding Dies, Sub-Press Dies, Taps Trimming Dies


Cheap and readily available;

It has one of the lowest hardening temperatures of all tool steels, lending itself to home-shop heat treating;

It has good resistance to warping during quenching.

LKALLOY is a leading Supplier of AISI O1 Steel. We mainly stocks and produces AISI O1 bar, AISI O1 flats, AISI O1 plates and other forms in various size and specifications.

Inquire Now