HS1-8-1 1.3327 High Speed Tool Steel

HS1-8-1/1.3327 is a high-carbon, high-tungsten-molybdenum high-speed tool steel conforming to the German standard DIN EN ISO 4957. It holds a significant position in the high-end tooling sector due to its outstanding high-temperature hardness, exceptional wear resistance, and balanced combination of strength and toughness.

The chemical composition of this steel grade is designed around a high carbon content, significantly increasing the alloying ratios of tungsten and molybdenum, supplemented by key elements such as vanadium and chromium. The high concentrations of tungsten and molybdenum jointly induce a pronounced secondary hardening effect, which is fundamental to its ability to maintain high hardness even in environments exceeding 600°C. The addition of vanadium significantly enhances the material's resistance to abrasive wear while refining the microstructure. Chromium ensures good hardenability and basic corrosion resistance. 

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: 950℃

Cooling in the furnace or in the sand

7: Heat treatment

1): Annealed:

Heat 1.3327 steel to 850-880℃

The holding temperature is slowly cooled at a rate of 10–20°C/hour to approximately 700°C. Subsequently, furnace cooling may continue at a slightly faster rate (approximately 30°C/hour) to below 500°C, after which the product may be removed from the furnace and air-cooled to room temperature

2): Quenching and tempering:  

Heat 1.3327 steel to 1180-1200℃ 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

1.3327 High-Speed Steel is highly specialized for high-performance, heavy-duty cutting and forming applications. Below is a classification of its primary uses:

1. High-Performance Cutting Tools

• Complex Precision Tools: Gear hobs, broaches, form cutters, reamers, and similar tools for machining difficult-to-cut materials like high-strength steels, superalloys, and titanium alloys. These tools require edges that maintain sharpness under sustained high temperatures and friction.

• High-efficiency drilling and threading tools: Manufacture of drills, taps, and thread milling cutters for high-speed, deep-hole machining.

• Heavy-duty cutting tools: Suitable for boring tools, turning inserts, end mills, etc., used in roughing and semi-finishing operations with large feed rates and deep cuts.

2. High-end mold applications

• Cold work dies: Manufacture punch and die components for cold heading dies, stamping dies, and precision blanking dies in high-strength metals. Demonstrate superior performance over standard mold steels when machining stainless steel, spring steel, and similar materials.

• Warm forging and hot work dies: Suitable for warm forging dies and certain hot work die inserts (e.g., cores in die-casting molds, wear-resistant components in extrusion dies).

3. Special Wear-Resistant Components

• Wear-resistant liners and guide components: For high-wear machine tool components like guideways, bushings, and centers

• Precision measurement and forming components: Manufacturing high-precision rollers, wear-resistant gauge blocks, etc.