Grade O1/ 1.2510

O1 / 1.2510 / 90MnCrV8 is a widely used oil-hardening cold-work tool steel known for its excellent balance of machinability, toughness, and edge retention. It is considered one of the most versatile and cost-effective tool steels, making it a preferred choice for manufacturers producing precision tools and cutting applications. Supplied in an annealed condition (typically 200–230 HB), O1 can be heat treated to achieve hardness levels of 57–63 HRC.

One of the key advantages of O1 tool steel is its excellent machinability compared to high-alloy grades like D2 and D3. This makes it ideal for applications requiring complex machining, shaping, and finishing. Its oil-hardening capability ensures a simple and reliable heat treatment process with minimal distortion, making it suitable for precision components.

Tool Steel

O1 offers good wear resistance along with superior toughness compared to high-carbon chromium steels. This combination allows it to perform well in medium-duty applications where both durability and resistance to chipping are important. Additionally, the presence of alloying elements like chromium, tungsten, and vanadium enhances its ability to retain a sharp cutting edge over extended use.

Due to its consistent performance, dimensional stability, and affordability, O1 / 1.2510 is widely used in manufacturing cutting tools, knives, gauges, and woodworking tools. Its versatility makes it suitable for a wide range of industries, including tooling, manufacturing, and craftsmanship

Key Properties

  • Excellent Machinability: Easier to machine than D2 and D3 steels, making it ideal for complex shaping, milling, and turning operations.
  • Good Hardness (57–63 HRC): Achieves high hardness through oil quenching, offering reliable performance and long tool life.
  • Good Wear Resistance: Suitable for medium-duty cutting tools, punches, dies, and precision blades.
  • Excellent Dimensional Stability: Low distortion during heat treatment, ideal for gauges and precision tools.
  • Good Toughness: Better resistance to chipping and cracking compared to high-carbon chromium steels like D3.
  • Fine Edge Retention: Maintains sharp cutting edges due to alloy carbide structure.

Common Applications

  • Punches and small dies
  • Industrial machine knives
  • Cutting tools and blades
  • Woodworking tools (chisels, plane blades)
  • Gauges and measuring instruments
  • Reamers, taps, and broaches
  • Plastic mould inserts (low wear areas)
  • Industrial and handmade knives

PUROHIT STEEL is a trusted name in the tool steel industry, with humble beginnings dating back to 1965 and over three decades of expertise in delivering high-quality materials and solutions. Today, the group operates multiple well-established units, maintaining a vast inventory ranging from hot work and cold work tool steels to specialized materials. Known for reliability and strong technical support, PUROHIT STEEL caters to the diverse requirements of small, medium, and large-scale industries. The company specializes in manufacturing moulds and tooling components using premium grades such as Grade O1/ 1.2510 which is ideal for applications including injection moulds (medium to large size), blow moulds, low-pressure die-casting dies, automotive moulds, tooling plates, extrusion dies, machine parts, shafts, and general tooling components. With a focus on quality, performance, and precision, PUROHIT STEEL continues to deliver durable and efficient tooling solutions.