Available Forms
Flats
Squares
Rounds
O1 Mode of Supply
O1 tool steel is supplied in flat, square, and round bars of all standard and custom sizes.
FlatsSquaresRoundsAISI O1
O1 is an oil-hardening cold work tool steel recognized for its versatility, good machinability, and reliable edge retention. It offers excellent dimensional stability and is one of the most widely used general-purpose tool steels, providing a good balance of hardness, toughness, and wear resistance at an economical price point.
O1 is an oil-hardening cold work tool steel valued for its versatility, excellent machinability, and good grindability. With achievable hardness of 57–62 HRC, it provides reliable edge retention and wear resistance while maintaining good dimensional stability during heat treatment. It is one of the most widely used general-purpose tool steels in the industry.
O1 offers a practical balance of hardness, toughness, and wear resistance at an economical price point, making it ideal for short to medium production runs. Its ease of machining and heat treatment makes it a preferred choice for toolmakers working with cutting tools, dies, gauges, and a wide range of precision tooling applications.
O1 tool steel is supplied in flat, square, and round bars of all standard and custom sizes.
FlatsSquaresRoundsTell us the application, required properties, and quantities. We’ll confirm supply capability and walk you through our process.