Grade H13/ 1.2344 ESR
Grade H13, also known as 1.2344, is one of the most widely used hot-work tool steels globally. The ESR refined variant, commonly referred to as Durah 61, is a premium, high-performance grade produced using advanced remelting and refining processes to enhance purity, microstructure, and overall performance.
Durah 61 offers significantly improved toughness, cleanliness, and high-temperature strength compared to conventional H13 steel. It belongs to the chromium-molybdenum-vanadium family and is specifically engineered to withstand extreme heat, pressure, and mechanical stress in demanding industrial environments.
This grade maintains excellent hardness and strength even at temperatures of 600–650°C, making it highly reliable for continuous hot-working applications. Its superior resistance to thermal fatigue and shock reduces the risk of cracking during rapid heating and cooling cycles.
Due to its refined structure, Durah 61 provides longer die life, improved wear resistance, and better performance under high-pressure and abrasive conditions. It is widely preferred in industries such as automotive, aerospace, and aluminum processing.
Chemical Properties of Grade H13/ 1.2344 ESR
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.35 – 0.42 |
| Silicon (Si) | 0.80 – 1.20 |
| Manganese (Mn) | 0.25 – 0.50 |
| Chromium (Cr) | 4.80 – 5.50 |
| Molybdenum (Mo) | 1.20 – 1.75 |
| Vanadium (V) | 0.80 – 1.20 |
Mechanical Properties of Grade H13/ 1.2344 ESR
| Property | Value |
|---|---|
| Hardness (Working) | 48 – 52 HRC |
| Tensile Strength | 1300 – 1600 MPa |
| Yield Strength | 1100 – 1400 MPa |
| Hot Strength | Excellent up to 600–650°C |
| Thermal Fatigue Resistance | Excellent |
| Wear Resistance | Very High |
| Toughness | Very High |
Key Features
- Premium ESR refined high-performance grade
- Excellent high-temperature strength
- Superior thermal fatigue and shock resistance
- High toughness and ductility
- Deep and uniform hardenability
- Enhanced wear and abrasion resistance
- Extended tool life and reduced maintenance
Key Properties
- Maintains hardness at 600–650°C
- Resistant to heat-checking and thermal cracking
- High fatigue resistance and structural stability
- Improved polishability and surface finish
- Reduced microcracks and internal defects
- Reliable performance in heavy-duty operations
Common Applications
- High-pressure aluminum die-casting dies
- Hot forging dies and inserts
- Aluminum and brass extrusion dies
- Core pins, ejector sleeves, and hot-runner components
- Shear blades for hot cutting
- Plastic moulds requiring strength and polishability
- Die holders and bolsters
- Hot punches, mandrels, and pressure pads
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 H11/ 1.2343 ESR 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.