Compared with the first generation of advanced high-strength steel, medium manganese steel has a Mn content of about 4%~12%, more austenite content at room temperature, and the stability is controllable, so that the deformation can be used more effectively. induced plastic effect. In general, the tensile strength of medium manganese steel can reach more than 980MPa, the elongation can reach more than 30%, and it has excellent formability. Its deformation and strengthening principles are mainly derived from nano/ultrafine grain and TRIP effect. Baosteel’s 1000MPa grade cold-rolled medium manganese steel completed the first international industrial trial production in April 2014. At present, 1000-1200MPa grade cold-rolled and hot-dip galvanized medium manganese steel has completed the trial production of parts.

The third generation of medium manganese steel for automobiles, when the tensile strength reaches 1000MPa, the strength-plastic product can reach more than 30GPa%, which has better deep drawing forming than the first generation steel (such as DP steel, CP steel, etc.) performance.

Medium manganese steel is suitable for stamping various complex car body structures and safety components. Compared with the first generation, the third-generation advanced high-strength steel has a weight reduction capacity of more than 15%.

What is the microstructure of medium manganese steel?

The microstructure of medium manganese steel is austenite + martensite + ferrite. The austenite volume fraction of 1000MPa grade medium manganese steel is generally greater than 30%.

What are the characteristics of HC700/980MTR steel?

C700/980MTR is a class of high-strength steel widely used in the automotive industry for its excellent mechanical properties and formability. Here are some of its features:

High strength: C700/980MTR steel has a high tensile strength of 700-980MPa, which is suitable for occasions requiring high strength.

Good formability: In addition to its high strength, C700/980MTR steel is also known for its excellent formability. This makes it easy to manufacture complex components.

Improve crashworthiness: C700/980MTR steel has high strength and the ability to absorb energy during impact, which improves crashworthiness and is suitable for the production of automotive safety components.

Lightweight: C700/980MTR steel is relatively lightweight compared to other types of high-strength steel, which helps reduce the weight of the final product and improve fuel efficiency.

Corrosion resistance: C700/980MTR steel has good corrosion resistance and is suitable for harsh environments where corrosion needs to be considered.

Overall, C700/980MTR steel is a high-performance material that combines high strength, good formability, improved crashworthiness, light weight and corrosion resistance. These properties make it an ideal material for the automotive industry, as well as other industries requiring high-performance materials.

What is the chemical composition of HC700/980MTR medium manganese steel?

HC700/980MTR medium manganese steel is a high strength steel with medium manganese content (6%~12%). The exact chemical composition of HC700/980MTR steel may vary depending on the specific manufacturing process and desired properties of the final product. However, typical chemical composition ranges for such steels may include:

Carbon (C): 0.12% – 0.18%

Manganese (Mn): 6% – 12%

Silicon (Si): 0.50% max

Phosphorus (P): 0.025% max

Sulfur (S): 0.010% max

Aluminum (Al): 0.10% – 0.30%

Titanium (Ti): 0.005% – 0.050%

Boron (B): 0.0005% – 0.0030%

In addition to these elements, HC700/980MTR steel may contain trace amounts of other elements such as copper, nickel and chromium, which affect its mechanical properties. Overall, the exact chemical composition of HC700/980MTR steel will depend on the balance of strength, ductility, and other properties for a particular application.

What are the mechanical properties of HC700/980MTR medium manganese steel?

HC700/980MTR medium manganese steel is a high strength steel with high strength and excellent ductility. The specific mechanical properties of HC700/980MTR steel will vary depending on the specific manufacturing process and heat treatment used, but some typical values are:

Tensile strength: 700 – 980 MPa

Yield strength: 700 – 800 MPa

Elongation: 12% – 25%

Area reduction: 35% – 50%

Hardness: 200 – 300 HB

HC700/980MTR steel offers higher strength and better ductility than conventional high-strength low-alloy (HSLA) steels, making it an attractive choice for a wide range of structural applications. Its combination of high strength and ductility allows it to withstand heavy loads and deformation without cracking, which can increase the safety and durability of structures made from this material.

What is the welding performance of HC700/980MTR medium manganese steel?

HC700/980MTR medium manganese steel has good welding performance and can be welded by a variety of welding techniques, including arc welding, gas welding, resistance welding, etc. However, some precautions need to be taken to ensure successful soldering.

The high strength and low carbon equivalent of HC700/980MTR steel means that it is prone to hydrogen-induced cracking (HIC) during welding. Therefore, it is important to use a low hydrogen electrode or wire and ensure that the welding environment is dry and free of moisture. Additionally, preheating the material prior to welding and controlling the interpass temperature during welding helps minimize the risk of HIC.

Another consideration when welding HC700/980MTR steel is the possibility of strain aging. Strain aging occurs when materials are subjected to cold deformation after welding, which results in a reduction in ductility and toughness. To prevent this, it is recommended to limit cold deformation and perform post-weld heat treatment (PWHT) to relieve residual stresses and restore the properties of the material.

Overall, with proper welding procedures and precautions, HC700/980MTR medium manganese steel can be welded successfully, making it a versatile material for a variety of manufacturing applications.

What is the deep drawing performance of HC700/980MTR medium manganese steel?

HC700/980MTR medium manganese steel has good deep drawing properties due to its excellent formability and ductility. Its high manganese content, combined with other alloying elements, increases the steel’s ability to deform and reduces the likelihood of cracking or breaking during forming.

In addition, HC700/980MTR steel has a relatively low yield-to-strength ratio, which means that high elongation and uniform deformation can be achieved even under large strain conditions. This is especially important for deep-drawing applications, where the material must be able to withstand significant plastic deformation without failure.

It is worth noting, however, that the deep drawability of HC700/980MTR steel can be influenced by a range of factors, including specific machining and forming conditions, material quality, and the design of the part being produced. Therefore, it is important to carefully optimize the forming parameters and ensure that the material meets the necessary quality standards for optimum performance in deep drawing applications.

How about the hardness of HC700/980MTR steel?

The hardness of HC700/980MTR medium manganese steel can vary according to the specific heat treatment and processing conditions. Generally, this material has high hardness due to its high strength and high carbon content.

In the as-rolled condition, HC700/980MTR steel has a typical hardness of around 200-250 HB (Brinell hardness), which is relatively high compared to other commonly used automotive steels. However, the hardness can be further increased through heat treatments such as quenching and tempering to achieve higher strength levels.

Notably, while high hardness is generally associated with high strength, it also leads to reduced ductility and toughness, which can be detrimental to the material’s overall performance in certain applications. Therefore, it is important to balance the hardness and other mechanical properties of HC700/980MTR steel to ensure that it meets the specific requirements of the intended application.

Which parts of the car will HC700/980MTR steel be used in?

HC700/980MTR medium manganese steel can be used in various parts of automobiles that require high strength and good ductility, such as:

Chassis and Frame Components: HC700/980MTR steel can be used to make frame rails, cross members and other structural components that provide strength and stiffness to a vehicle’s chassis.

Suspension Components: HC700/980MTR steel can be used to manufacture suspension components such as control arms, steering knuckles and other components that are subject to high stress and strain during normal vehicle operation.

Body reinforcements: HC700/980MTR steel can be used for reinforcements of body structures, such as door beams, B-pillars and other components that help improve crashworthiness and passenger safety.

Exhaust system components: HC700/980MTR steel has high temperature resistance and good corrosion resistance, and can be used to make exhaust system components, such as mufflers and pipes.

HC700/980MTR steel can be used in a wide range of automotive applications requiring high strength, good ductility, and other desirable properties, making it a versatile and promising material for the automotive industry.

HC700/980MTR medium manganese steel from SO lucky is a promising new material for the automotive industry that combines high strength, good ductility and other desirable properties that help improve vehicle performance, efficiency and safety. If you work in the automotive industry and are looking for high-performance materials that can help your products to the next level, consider using HC700/980MTR steel in your designs.