H11/1.2343 Steel

H11/1.2343 Steel

H11/1.2343 steel is a high-alloy hot-work die steel known for its excellent hardenability, wear resistance, and thermal fatigue resistance. It is primarily composed of elements such as chromium and molybdenum. After undergoing quenching and tempering processes, it achieves high hardness and good toughness. This steel grade is widely used in die-casting molds, extrusion molds, and hot-forming molds for metals such as aluminum and copper. It is particularly suitable for manufacturing mold components that withstand high stresses and temperatures.

Product Parameter Table

Chemical composition :

C

Si

Mn

P

S

Cr

V

Mo

0.35-0.45

0.80-1.25

0.20-0.60

≤0.03

≤0.03

4.75-5.50

0.30-0.60

1.10-1.60

Mechanical properties :

Hardness,HRC

45

46.5

48.5

Tensile strength,Mpa

1450

1580

1680

Yield strength Rp 0.2,Mpa

1240

1340

1410

Elongation A5 ,%

13

13

12

Reduction in area Z,%

65

65

64

H11/1.2343 steel is widely used in mold manufacturing, particularly in applications requiring high temperature and stress resistance.

Application

1. Die-casting molds: Suitable for die-casting of metals such as aluminum alloy and zinc alloy, ensuring that the mold maintains stable shape and size under high temperature and pressure.

2. Plastic injection molds: Used for producing various types of plastic products, such as household appliance shells and automotive parts, meeting the demands of high-temperature injection molding processes.

 3. Hot-working molds: Such as hot extrusion, hot stamping, and hot forging molds, capable of enduring high temperatures and stresses, thereby extending the service life of the molds.
 
4. Tool manufacturing: Suitable for making molds for extruding light metal alloys, hot pressing molds, etc., fulfilling the requirements for high hardness and wear resistance.
 
5. H11/1.2343 steel is also suitable for manufacturing components that require high heat resistance and thermal fatigue resistance, as well as mold components that endure high stresses and temperatures.

Customer Testimonials

Excellent Heat Resistance and Toughness
“We’ve been using H11 (1.2343) steel for high-temperature applications, and it holds up incredibly well. Its toughness and heat resistance make it ideal for die-casting and forging tools.”

Superior Wear Resistance
“H11 steel offers outstanding wear resistance, which extends the lifespan of our tooling. Even under extreme working conditions, it maintains its strength and integrity.”

Easy to Machine and Treat
“This steel is easy to machine and responds well to heat treatment. It allows us to achieve the hardness levels we need without compromising durability.”

Reliable for High-Stress Applications
“H11 is our preferred choice for high-stress components. Whether in aerospace, automotive, or tooling, it consistently delivers top-tier performance.”

Versatile and Dependable
“From extrusion dies to hot-work molds, H11 steel adapts well to various applications. Its balance of toughness and stability ensures reliable results every time.”

Related Products
tool steel types
H13/1.2344
Steel round bar
H11/1.2343
Steel round bar
H10/1.2365
FAQ

The main chemical components of H11/1.2343 steel include chromium (Cr), molybdenum (Mo), and vanadium (V), among others. Typically, the chromium content is around 5%, the molybdenum content is approximately 1.18%, and the vanadium content is about 0.3%. The addition of these elements collectively enhances the steel’s wear resistance, hardness, and toughness.

The heat treatment process for H11/1.2343 steel primarily includes heating, soaking, quenching, and tempering steps. During quenching, the steel is usually heated to a temperature between 980°C and 1020°C, then rapidly cooled to achieve high hardness. Tempering is carried out at a temperature range of 520~700°C, typically for at least two cycles, with each tempering lasting at least two hours, to adjust the hardness and toughness.

Due to its excellent wear resistance, high-temperature strength, and toughness, H11/1.2343 steel is widely used in die-casting molds, extrusion molds, and hot-forming molds for metals such as aluminum and copper. Additionally, it can be used to manufacture mold components that withstand high stresses and temperatures, such as inserts, cores, and runner blocks in die-casting molds.

The delivery condition of H11/1.2343 steel is usually in the annealed state, with a maximum hardness of no more than 225 Brinell hardness (according to some sources, the maximum annealing hardness may be 229 Brinell hardness). The supply range includes round bars and special sizes to meet the needs of different customers.

When using H11/1.2343 steel, attention should be paid to the following points:
Heat treatment process: Ensure that the correct heat treatment process is followed for heating, soaking, quenching, and tempering to obtain the desired microstructure and properties.
Surface treatment: Adopt appropriate surface treatment methods, such as grinding and polishing, as needed, to improve the surface finish and accuracy of the mold.
Operating temperature range: Reasonably control the operating temperature range to avoid excessive or insufficient temperatures that could lead to decreased steel performance.
Maintenance: Regularly clean and lubricate the mold surface, and promptly inspect and address any potential damage or wear areas.
Storage conditions: Store in a dry, well-ventilated environment free of corrosive gases to avoid exposure to moisture, acids, bases, and other corrosive media.