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H13

H13 Tool Steel is a versatile chromium-molybdenum hot work steel that is widely used in hot work and cold work tooling applications. The hot hardness (hot strength) of H13 resist occurs thermal fatigue cracking which as a result of cyclic heating and cooling cycles in hot work tooling applications. Because of its excellent combination of high toughness and resistance to thermal fatigue cracking (also known as heat checking) H13 is used for more hot work tooling applications than any other tool steel.
Because of its high toughness and very good stability in heat treatment, H13 is also used in a variety of cold work tooling applications.
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CHEMICAL COMPOSITION


C: 0.32-0.45

Si: 0.8-1.2

Mn: 0.20-0.50

P: ≤0.03

S: ≤0.03

Cr: 4.75-5.50

Mo: 1.1-1.75

V: 0.8-1.2


MECHANICAL PROPERTIES


Tensile strength, ultimate (@20°C/68°F, varies with heat treatment): 1200 – 1590 MPa/ 174000 – 231000 psi

Tensile strength, yield (@20°C/68°F, varies with heat treatment): 1000 – 1380 MPa/ 145000 – 200000 psi

Reduction of area (@20°C/68°F): 50.00%/ 50.00%

Modulus of elasticity (@20°C/68°F): 215 GPa/ 31200 ksi

Poisson’s ratio: 0.27-0.30/ 0.27-0.30


PHYSICAL PROPERTIES

Density (@20°C/68°F): 7.80 g/cm3; 0.282 lb/in3

Melting point: 1427°C; 2600°F


HEAT TREATMENT


Ac1: 875℃

Ac3: 935℃

Ar1: 760℃

Ms: 305℃


FORGING


Initial Forging Temperature:1065-1175℃

Final Forging Temperature:850-900℃

Forging Ratio:above 4:1

Post-Forging Treatment:H13 steel needs to be annealed after forging.After heating to 860 ℃ for heat preservation,cool slowly, the cooling rate is about 30 ℃/h,and after cooling to 400~500°C in the furnace, air cooling.


Overview


Tool steel is a specialized class of alloy steel meticulously engineered to meet the demanding requirements of tool - making and machining applications. Designed to withstand high levels of stress, abrasion, and heat, tool steel offers exceptional hardness, wear resistance, and toughness, making it the material of choice for manufacturing cutting tools, dies, molds, and other precision - engineered components. Through a combination of carefully selected alloying elements and precise heat - treatment processes, tool steel can be tailored to possess specific properties that are essential for different types of tooling applications, enabling manufacturers to produce high - quality tools that deliver consistent performance and long service life.


Features


1. Extraordinary Hardness: One of the primary features of tool steel is its high hardness, which allows it to cut, shape, and form other materials with precision. The hardness of tool steel is achieved through the addition of alloying elements such as tungsten, molybdenum, chromium, and vanadium, which form hard carbides within the steel matrix. These carbides provide the necessary resistance to wear and deformation, ensuring that the tool retains its cutting edge and shape even under heavy use. Different types of tool steel can have varying levels of hardness, ranging from relatively soft for easy machining during the initial shaping process to extremely hard for the final cutting or forming operations.


2. Superior Wear Resistance: Tool steel exhibits excellent wear resistance, which is crucial for tools that are subjected to continuous contact and friction with other materials. The hard carbides in tool steel act as tiny cutting edges, resisting the abrasion caused by the removal of material during machining or forming processes. This wear resistance not only extends the life of the tool but also maintains the accuracy and quality of the finished product. Tools made from high - wear - resistant tool steel can be used for a longer period without significant degradation in performance, reducing the frequency of tool replacement and increasing productivity.


3. Good Toughness: Despite its high hardness, tool steel also offers good toughness, which is the ability to withstand impact and sudden loads without breaking. Toughness is important for tools that are used in applications where there may be shock or vibration, such as forging dies and stamping tools. By carefully controlling the alloy composition and heat - treatment process, tool steel can be made to have a balance between hardness and toughness, ensuring that it can withstand the rigors of demanding machining and forming operations without cracking or fracturing.


4. Heat - Resistance: Many types of tool steel are designed to have excellent heat - resistance properties. This allows the tools to maintain their hardness and dimensional stability even when exposed to high temperatures during machining processes, such as hot forging or high - speed cutting. Alloying elements like tungsten and molybdenum play a key role in enhancing the heat - resistance of tool steel by forming stable carbides that are resistant to softening at elevated temperatures. Heat - resistant tool steel is essential for applications where the tool needs to operate in a hot environment without losing its cutting performance or shape.


Applications


1. Cutting Tools: Tool steel is widely used in the manufacturing of cutting tools, including drills, milling cutters, lathe tools, and saw blades. The high hardness and wear resistance of tool steel enable these cutting tools to cut through various materials, such as metals, plastics, and wood, with precision and efficiency. Different types of tool steel are selected based on the specific cutting application, the material being cut, and the cutting conditions. For example, high - speed steel (HSS) is commonly used for cutting tools that require high - speed operation and good wear resistance, while carbide - tipped tool steel is preferred for cutting hard materials due to its superior hardness and heat - resistance.


2. Dies and Molds: In the metalworking and plastic - molding industries, tool steel is used for making dies and molds. Dies are used for processes such as forging, stamping, and extrusion, where they shape metal into the desired form. Molds are used in plastic injection molding to create plastic parts. The high hardness, wear resistance, and toughness of tool steel ensure that dies and molds can withstand the high pressures and temperatures involved in these processes, while maintaining the accuracy and quality of the molded or forged products. Tool steel dies and molds can be customized to meet the specific requirements of different products, allowing for the production of complex shapes and designs.


3. Woodworking Tools: Tool steel is also used in the production of woodworking tools, such as planer blades, chisels, and carving tools. The hardness and sharpness of tool steel enable these tools to cut through wood smoothly and precisely, creating clean and accurate cuts. The wear resistance of tool steel ensures that the cutting edges of woodworking tools remain sharp for a long time, reducing the need for frequent sharpening and increasing the efficiency of woodworking operations. Additionally, the toughness of tool steel allows woodworking tools to withstand the impact and forces applied during cutting, preventing breakage and damage.


H13


The Management and Staff at Union Steel, have a firm belief that by identifying the customers’ needs, we can achieve the best results for all. Union Steel warmly welcomes friends around the world to cooperate with us.

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