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H13 | 1. | SKD61 | Hot Work Tool Steel - SteelPRO Group

H13 | 1. | SKD61 | Hot Work Tool Steel

H13 | 1. | SKD61 | Hot Work Tool Steel

H13 is a widely used hot work tool steel. It conforms to the ASTM A681 standard. The “H” indicates its use in hot work applications, and “13” is its grade number. Equivalent grades include 1. (Germany), SKD61 (Japan), and BH13 (China). H13 has high toughness, good resistance to thermal fatigue, and excellent wear resistance. It is used for die-casting molds, extrusion dies, forging tools, and other high-temperature applications.

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Description

What Is H13?

H13 is composed of approximately 0.4% carbon, 5.25% chromium, 1.35% molybdenum, and 1.0% vanadium, with the balance being iron. It is a solid, high-alloy tool steel known for its excellent toughness and resistance to thermal fatigue. H13 has high hardenability and maintains its hardness at elevated temperatures. This steel is primarily used in hot work applications such as die casting, extrusion, and forging tools. H13 is produced through hot rolling, followed by annealing to refine its grain structure. It can be further classified into subgrades like H13 ESR (Electro-Slag Refined) for enhanced cleanliness and H13 Mod (Modified) for improved toughness.

Characteristics of H13 Steel

H13 steel is a versatile hot work tool steel known for its excellent toughness, thermal fatigue resistance, and ability to withstand high temperatures. It features high hardenability and can maintain hardness at elevated temperatures. This makes it ideal for hot work applications such as extrusion, forging, and die casting. Advantages of H13 include good resistance to thermal shock, wear resistance, and high strength at elevated temperatures. It is also highly machinable, which simplifies manufacturing processes. For scenarios where H13 might not be suitable, consider using other steel grades such as A2, D2, or M2. These alternatives offer different balances of wear resistance, toughness, and hardness that can address specific needs. H13 is commonly used in applications like die-casting molds, extrusion dies, forging dies, and hot shearing blades. Its ability to perform reliably in extreme conditions makes it a preferred choice in the manufacturing industry.

Chemical Compositions

ElementContent (%) Carbon, C0.32 – 0.45 Chromium, Cr4.75 – 5.50 Molybdenum, Mo1.10 – 1.75 Vanadium, V0.80 – 1.20 Silicon, Si0.80 – 1.20 Manganese, Mn0.20 – 0.50 Phosphorus, P≤ 0.030 Sulfur, S≤ 0.030

Physical Properties

PropertyMetricImperial Density7.8 g/cm³0.282 lb/in³ Melting Point – °C – °F Boiling Point–– Thermal Conductivity28 W/m·K16.2 BTU/(hr·ft·°F) Electrical Conductivity1.4 % IACS1.4 % IACS Specific Heat Capacity460 J/(kg·K)0.11 BTU/(lb·°F) Thermal Expansion Coefficient11.3 µm/(m·K)6.3 µin/(in·°F) Electrical Resistivity71 µΩ·cm28 µΩ·in

Mechanical Properties

AC (Air Cooled) Sate

PropertyMetricImperial Tensile Strength – MPa149 – 215 ksi Yield Strength860 – MPa125 – 145 ksi Brinell Hardness HBW190 – – 230 Rockwell Hardness HRC45 – – 55 Vickers Hardness HV200 – – 250 Elongation10 – 14 %10 – 14 % Elastic Modulus210 GPa30.5 Msi

QT (Quenched & Tempered) State

PropertyMetric ValueImperial Value Tensile Strength MPa224.8 ksi Yield Strength MPa188.5 ksi Elongation12%12% Reduction of Area45%45% Impact Absorption Energy35 J25.8 ft-lb Elastic Modulus210 GPa30.5 Mpsi

Industries & Applications

IndustryApplication AutomotiveEngine Components, Gears, Shafts, Tools AerospaceTurbine Blades, Fasteners, Bearings, Structural Components Tool and DieMolds, Dies, Punches, Cutting Tools ManufacturingMachine Parts, Press Tools, Jigs, Fixtures ConstructionDrill Bits, Cutters, Structural Supports, Fasteners ElectronicsConnectors, Terminals, Enclosures, Heat Sinks Oil and GasValves, Pumps, Drilling Equipment, Seals Medical DevicesSurgical Instruments, Dental Tools, Orthopedic Implants, Biopsy Needles EnergyTurbines, Generators, Power Tools, Heat Exchangers

Machining

Heat Treatment

  1. Annealing: Heat H13 steel to -°F, soak for 1 hour per inch of thickness, then cool slowly in the furnace at 20°F/hour to °F, followed by air cooling.
  2. Stress Relieving: Heat to -°F, soak for 1-2 hours, then cool in still air.
  3. Hardening: Preheat to -°F and -°F, then heat rapidly to -°F, soak for 20-30 minutes.
  4. Quenching: Quench in still air, gas, or salt bath.
  5. Tempering: Temper at -°F, soak for 2 hours per inch, repeat cycles to achieve 48-52 HRC hardness.

Surface Finish

  • Pickling and Oiling: Remove the scale with hydrochloric acid and apply oil to prevent rust.
  • Hot-Dip Galvanizing: Submerge in molten zinc for corrosion resistance.
  • Electro-Galvanizing: Apply zinc via an electrochemical process for a smooth finish.
  • Cold Rolling: Roll steel below recrystallization temperature for improved properties.
  • Powder Coating: Apply dry powder and cure under heat for a durable finish.
  • Painting: Apply liquid paint for protection and appearance enhancement.

*Customization is available upon request.

Disclaimer

The provided heat treatment and surface treatment processes are general guidelines. Actual conditions may vary depending on specific applications and requirements. It is recommended to consult with a professional metallurgist or material scientist to tailor the processes to your particular needs. The information herein is not a substitute for professional advice and should not be relied upon as such.

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DIN 1. Steel (H13) – Properties & Applications

Description

DIN 1. Steel and H13 Steel Properties, Applications, and Advantages:- 

DIN 1. steel, commonly referred to as H13 Steel in the AISI classification.

it is a versatile and reliable hot work tool steel known for its exceptional thermal resistance, toughness, and durability.

Its unique properties make it a popular choice across various industries, including die casting, extrusion, and forging.

This steel is widely used for manufacturing tools and components exposed to high temperatures, mechanical stresses, and wear.

In this article, we’ll delve into the properties, applications, and benefits of DIN 1. steel, helping you understand why it’s a top-tier material for demanding industrial tasks.

Overview of DIN 1. Steel/ H13 STEEL.

DIN 1. steel is a chromium-molybdenum-vanadium alloyed tool steel with excellent thermal stability and wear resistance.

It falls under the category of hot work tool steels, which are specifically designed to withstand extreme conditions encountered in high-temperature operations.

Its balanced chemical composition allows it to retain hardness and mechanical strength even when exposed to high heat, making it ideal for tools and molds used in industrial applications.

Key Properties of DIN 1. Steel/ H13 STEEL.

DIN 1. steel possesses a range of properties that make it a standout choice for hot work applications. These properties include:

1. High Thermal Stability

DIN 1. steel maintains its strength and hardness even at elevated temperatures, often exceeding 600°C.

This resistance to thermal softening ensures reliable performance in applications involving intense heat cycles.

2. Excellent Toughness

The steel exhibits high toughness, enabling it to withstand significant mechanical stresses and impacts without cracking or deforming.

This toughness is particularly valuable in die casting and forging applications.

3. Good Wear Resistance

With its optimized alloy composition, DIN 1. steel offers excellent resistance to abrasive wear and thermal fatigue.

This durability reduces the need for frequent replacements, enhancing overall efficiency.

4. Outstanding Heat Resistance

The addition of chromium and vanadium gives this steel excellent resistance to heat checking and deformation caused by thermal shocks.

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This property is critical for molds and tools exposed to rapid temperature changes.

5. Ease of Machining and Polishing

DIN 1. steel is relatively easy to machine and polish, making it a preferred choice for precision tools and molds that require intricate details or high surface finishes.

Chemical Composition of DIN 1. Steel is given below:-

The chemical composition of DIN 1. steel is carefully designed to balance hardness, toughness, and heat resistance. Its approximate composition is as follows:

  • Carbon (C): 0.37–0.42%
  • Chromium (Cr): 4.8–5.5%
  • Molybdenum (Mo): 1.2–1.5%
  • Vanadium (V): 0.8–1.2%
  • Silicon (Si): 0.8–1.2%
  • Manganese (Mn): 0.3–0.5%

This combination of elements enhances the steel’s resistance to thermal stress, wear, and corrosion, ensuring long-lasting performance under demanding conditions.

Applications of DIN 1. Steel

DIN 1. steel is widely used across various industries due to its exceptional properties. Some common applications include:

1. Die Casting Molds

The high thermal stability and wear resistance of DIN 1. steel make it ideal for manufacturing die casting molds used for non-ferrous alloys like aluminum, magnesium, and zinc.

2. Extrusion Tools

Extrusion dies and tools made from DIN 1. steel can withstand the high pressures and temperatures involved in shaping metals and polymers, ensuring consistent performance.

3. Forging Dies

This steel is often used in forging dies, as it can endure repeated impacts and high temperatures without losing its mechanical integrity.

4. Plastic Molding

For plastic molding applications that require high surface finishes and thermal resistance, DIN 1. steel is a preferred choice due to its polishability and durability.

5. Hot Shearing Blades

DIN 1. steel is used in the production of hot shearing blades, where the ability to resist wear and thermal cracking is essential for reliable operation.

Benefits of Using DIN 1. Steel

DIN 1. steel offers several advantages that make it a preferred material for demanding industrial applications:

1. Extended Tool Life

The combination of high wear resistance and toughness ensures a longer service life for tools and molds, reducing downtime and replacement costs.

2. Enhanced Productivity

With its ability to withstand high temperatures and mechanical stresses, DIN 1. steel minimizes the risk of tool failure, ensuring uninterrupted operations and higher productivity.

3. Cost-Effectiveness

While the initial cost of DIN 1. steel may be higher than standard grades, its durability and low maintenance requirements make it a cost-effective solution in the long run.

4. Versatility

The wide range of applications supported by DIN 1. hot work tool steel highlights its versatility, allowing it to be used in various industries and processes.

5. Improved Surface Quality

The steel’s excellent polishability and machinability result in high-quality surface finishes, which are essential for precision molds and components.

Heat Treatment and Hardness

DIN 1. steel is often heat-treated to achieve the desired hardness and mechanical properties.

After proper hardening and tempering, the steel can achieve a hardness of 45–55 HRC, depending on the application requirements.

This heat treatment process enhances the material’s wear resistance and toughness, ensuring it meets the performance demands of high-stress environments.

Conclusion

DIN 1. steel is a premium hot work tool steel that combines exceptional thermal stability, toughness, and wear resistance.

Its versatile properties make it an ideal choice for die casting molds, extrusion tools, forging dies, and other applications where performance and durability are paramount.

By investing in DIN 1. steel, industries can benefit from improved productivity, reduced maintenance, and cost savings, ensuring long-term efficiency and reliability.

Whether you need high-performance molds or durable tools for high-temperature applications, DIN 1. steel is a proven solution that delivers unmatched value.