HS1-4-2 1.3326 High Speed Tool Steel

HS1-4-2/1.3326 is a high-performance tungsten-molybdenum high-speed tool steel conforming to the German standard DIN EN ISO 4957. It is renowned for its outstanding thermal hardness, exceptional wear resistance, and well-balanced toughness.

The core chemical composition of 1.3326 steel features a high carbon content, supplemented with tungsten, molybdenum, vanadium, and chromium. Tungsten and molybdenum jointly provide a powerful secondary hardening effect, ensuring hardness retention at elevated temperatures. The addition of vanadium significantly enhances wear resistance and refines the grain structure, while chromium guarantees fundamental hardenability and oxidation resistance. This alloy design makes it particularly suitable for manufacturing high-demand drill bits, milling cutters, gear cutting tools, and precision forming dies operating at elevated temperatures.

1: Steel equivalent

2: Chemical composition

3: Surface hardness and hardenability

4: Supply size & Tolerance & Stock size

To ensure optimal performance for your application, we produce 1.3326 high speed tool steel on a dedicated make-to-order basis. This approach guarantees fresh production and allows us to customize the process for your specific requirements. Tell us your needs, and let's get started.

5: Ultrasonic Test    

EN10228-3 class III or Sep 1921-84 D/D

6：Steel making & Forging processing

1): Steel making process:

  EF+LF+VD

  EAF+LF+VD

  EF+LF+VD+ESR

  EAF+LF+VD+ESR

2): Forging processing:  

Initial temperature: 1100-1150℃

Final temperature: 900℃

Cooling in the furnace or in the sand

7: Heat treatment

1): Annealed:

Heat 1.3326 steel to 840-860℃

Slowly cool in the furnace to approximately 500°C, then remove from the furnace and allow to cool in air to room temperature

2): Quenching and tempering:  

Heat 1.3326 steel to 1170-1190℃ in the salt bath furnace

Quench in the oil

Temper steel at 550-570℃ in the furnace

Cooling in the air.

Above curve in figure is a rough guide to the tempering behaviour of steels.

8：Application

1.3326 is a high-performance tungsten-molybdenum-based high-speed steel characterized by its ability to maintain high hardness at elevated temperatures and exceptional wear resistance. Due to these outstanding properties, 1.3326 is widely used in manufacturing various precision cutting tools and durable molds operating under high-speed, high-temperature, and heavy-load conditions. Primary application areas and specific uses:

1. High-performance cutting tools

• Drills: Manufacture of deep-hole drills, gun drills, and solid carbide drill replacements for machining stainless steel, high-temperature alloys, and hardened steels (HRC 45+).

• Milling Cutters: Production of end mills, face mills, and form cutters for machining difficult-to-cut materials, demonstrating exceptional performance in high-speed milling (HSM) and dry cutting conditions.

• Gear Cutting Tools: Manufacture hobs, broaches, shaving tools, etc., for machining high-hardness gears

• Thread Cutting Tools: Manufacture taps, dies, thread milling cutters for threading high-strength materials

• Reamers and Reaming Tools: For high-precision, high-surface-quality internal hole machining

2. High-Load Cold Work Dies

• High-wear-resistant punches and dies: Used for blanking silicon steel sheets, high-carbon steel plates, stainless steel plates, and other applications demanding extreme wear resistance

• Precision cold extrusion dies: Used for extruding high-strength steel or complex-shaped components

• Powder metallurgy dies: Used for pressing high-hardness, high-wear-resistance metal powders (e.g., iron-based, alloy steel powders), offering extended die life

3. Warm and Hot-Work Dies

• Warm forging dies: Used for precision forging at elevated temperatures (e.g., 400-600°C)

• Wear-resistant hot-work components: Such as heat-resistant and wear-resistant inserts in die-casting machines, core pins for aluminum-copper alloy die-casting, etc.