Din 1.2343 Hot Work Tool Steel | Steel Grade 2343

Heat Treatment & Processes:

Heat Treatment:

H11 / DIN / AISI H11 tool steel undergoes several heat treatments, including annealing, hardening, air and oil quenching, as well as single or double tempering. These processes are typically executed at temperatures of 840°F (450°C), 930°F (500°C), 1022°F (550°C), 1112°F (600°C), and 1202°F (650°C). The optimal heat treatment combines hardness, toughness, yield strength, ultimate strength, and ductility, including oil-quenching and double-tempering at 1022°F (550°C).

Please visit our website for more detailed information.

Hardening:

The austenitizing temperature, which should range between 1700°F and 2000°F, along with the quenching medium and tempering parameters, significantly influence the hardness of H11 / DIN / AISI H11 steel. Due to its high hardenability, H11 steel should be hardened through cooling in still air.

Tempering:

Tempering is essential for H11 steel to enhance its resilience and reduce brittleness. This involves reheating the steel to a temperature lower than its critical temperature—typically between 500°C and 650°C (932°F and 1202°F)—and maintaining that temperature for a specified duration. Achieving the perfect balance between hardness and toughness determines the specific tempering temperature and time. Double tempering is also an option, taking place once per hour at the desired tempering temperature.

Forging:

Forging of H11 / DIN / AISI H11 steel is usually conducted between 1100°C and 1200°C (2012°F and 2192°F). The specific temperature may vary according to the required deformation properties and manufacturer's guidelines.

Stress Relieving:

Stress relieving involves heating H11 / DIN / AISI H11 steel to a temperature of 650°C (1202°F) for two hours, followed by gradual cooling.

Normalizing:

Due to its air-hardening characteristic, H11 / DIN / AISI H11 steel should not undergo normalizing.

Annealing:

H11 / DIN / AISI H11 tool steels are annealed at 871°C (1600°F) and subsequently cooled at a rate of 4°C (40°F) per hour in the furnace.

Nitriding:

Nitriding of H11 / DIN / AISI H11 steel can be performed at temperatures ranging from 500°C to 600°C (932°F to 1112°F) to achieve a hardened surface.

Welding:

During forging operations, the surface temperature of dies can reach 700-800°C (1292-1472°F). To enhance the effectiveness and lifespan of the dies, hardfacing with nonferrous high-temperature alloys like Stellite 6 is often employed. Notable properties of Stellite 6 include high hardness, galling resistance, and resistance to hot corrosion. However, due to high alloy content and resulting hardenability, this steel is susceptible to hydrogen-induced cracking (HIC) during welding. Studies indicate that hardfacing H11 tool steel should not be attempted in its annealed state; instead, preheating to intermediate temperatures between 310°C and 370°C (590°F - 698°F) is advised.

Quenching:

After being maintained at a specific soaking period, H11 / DIN / AISI H11 steel is rapidly cooled by immersing it in a quenching medium. The selection of the medium—whether oil, water, or air—hinges on the steel's composition and desired hardness. Oil provides a moderate cooling rate, water a faster one, and air the slowest.

AISI H11 tool steel is a 5% chromium hot work tool steel known for its excellent impact toughness. According to the AISI classification system, chromium hot-work tool steels fall under group H, specified in ASTM A681. Common chromium hot-work steels include H11, H12, and H13, ranging from H1 to H19.

In comparison to H13, H11 tool steel contains less vanadium, resulting in higher toughness but slightly lower wear and temper resistance. H11 is a deep-hardening, air-hardening steel, allowing it to undergo heat treatment with minimal size change during the air-quenching process. Additionally, H11 steel exhibits tremendous resistance to thermal fatigue cracking and thermal shock during water cooling in service.

With competitive pricing and timely delivery, Jiebao looks forward to being your supplier and partner.

As a serious supplier of AISI H11 tool steel, we understand your requirements. Below is the complete data for AISI H11 hot work steel.

1. ASTM A681 H11 Tool Steel Supply Range

H-11 Steels Round Bar: diameter 8mm - 25mm
H11 Steel Flat: thickness 16-500mm x width 200-800mm
H11 Steel Plates: thickness 16-500mm x width 200-810mm
Other dimensions are available upon request.

Surface Finish: Options include Black, Rough Machined, Peeled, Turned, or customized based on requirements.

2. AISI H11 Tool Steel Standards and Relevant Specifications

3. H11 Tool Steel and Equivalents' Chemical Composition

4. H11 Hot Work Tool Steel Properties

Physical Properties

Mechanical Properties

5. Forging of H11 Tool Steels

AISI H11 alloy steels are typically forged at temperatures above 900°C (1652°F). It is not advisable to forge this type of steel below 899°C (1650°F).

6. AISI H11 Tool Steel Heat Treatment

Annealing of H-11 Steel: Perform annealing at 871°C and slow cool at a rate of 4.4°C per hour or less in the furnace.

Tempering of Steel H11: Temper the steel at temperatures between 537°C to 648°C for achieving Rockwell C hardness between 54 and 38. Double tempering for one hour at the selected temperature is recommended.

7. Applications of AISI H11 Tool Steel

H11 alloy steel is routinely employed in highly stressed structural components, such as aircraft landing gear. Typical applications include hot punches, die casting dies, forging dies, hot shear blades, gripper dies, and extrusion tooling. Tools crafted from H11 chromium hot-work steels can be safely cooled using water due to their low carbon and alloy content.

As a reliable supplier of AISI H11 tool steel, we are committed to providing high-quality materials. For the best offers on AISI H11 steel, do not hesitate to contact us.

For more information on tool steel, feel free to reach out.