Grade VR 300
VR 300 is a premium pre-hardened mould steel widely used in the plastic mould industry. It belongs to the same family as 1.2311 steel / 1.2738 steel, but offers improved performance in terms of hardness uniformity, machinability, toughness, and surface finish. Supplied in a pre-hardened condition of approximately 30–33 HRC, it eliminates the need for additional heat treatment, reducing production time and avoiding distortion.
One of the key strengths of VR 300 is its uniform hardness throughout the cross-section, even in large mould blocks. This ensures dimensional stability and consistent performance during operation. Compared to conventional P20 grades, VR 300 provides better reliability for large and complex moulds.
The material also offers excellent machinability, allowing efficient milling, drilling, EDM, and grinding with reduced tool wear. Its fine and homogeneous microstructure ensures superior polishability and texturing, making it suitable for high-quality surface finish applications such as automotive and consumer products.
Additionally, VR 300 has good toughness and weldability, reducing the risk of cracking and enabling easy repair. It can also be nitrided to achieve surface hardness up to 55–60 HRC, enhancing wear resistance and extending tool life. Overall, VR 300 is an advanced and reliable choice for high-performance mould applications.
Key Properties
- Pre-hardened (30–33 HRC)
- Excellent hardness uniformity across large sections
- Superior machinability (milling, EDM, drilling, grinding)
- High toughness and crack resistance
- Excellent polishability and texturing capability
- Fine and homogeneous microstructure
- Good weldability for repair and maintenance
- Nitriding capability (surface hardness up to 55–60 HRC)
Common Applications
- Injection moulds (medium to large components)
- Blow moulds
- Mould bases
- Die casting tools (low-melting alloys)
- Automotive interior and exterior moulds
- Consumer electronics housings
- Moulds requiring high surface finish
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 VR 300, 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.