Basic material properties and standards

1. Product positioning: Docol 355HE is a hot-rolled high-strength steel developed by SSAB. It is an upgraded product of traditional high-strength low-alloy steel (HSLA) and is specially developed to solve the design and production challenges under the harsh manufacturing conditions of the automotive industry.

2. Implementation standards: This grade has reached and exceeded the EN10149.2 standard, and can provide dual certification to be compatible with the existing production system, and can be applied without changing the process standards.

3. Mechanical properties: The tensile strength grade is 355MPa, the thickness specification covers 2-6mm, and it is supplied in the form of coils or sheets, with excellent formability and welding performance

Mechanical Properties

Chemical Composition

Core technical advantages

1. Improved edge ductility: By optimizing the microstructure, the shear edge quality and hole expansion rate are significantly improved, which can effectively reduce the risk of defects such as microcracks and burrs during the forming process.

2. Process adaptability: It supports precision blanking processing and is suitable for complex forming of components with trimmed edges, which can reduce scrap rate and improve material utilization.

3. Performance balance: While maintaining high strength, it takes into account low-temperature toughness and processing performance, meeting the dual needs of automotive parts for structural safety and manufacturing efficiency

Typical application areas

1. Automotive structural parts: Mainly used for chassis components, seat frames, consoles and other key load-bearing components

2. Transmission system: Suitable for transmission parts that require high-precision molding such as clutches and couplings

3. Innovative design scenarios: Especially suitable for developing new components with complex geometric shapes to expand the design space of lightweight bodies

Market and technology trends

1. SSAB strategic products: As an important component of the company's advanced high-strength steel (AHSS) series, it reflects the technical development direction from "higher strength grade" to "better performance balance".

2. Continuous upgrade plan: Subsequent research and development will focus on expanding the size range (such as larger thickness specifications) and improving tensile strength (further breakthroughs based on the existing 355-500MPa series.

3. Cost-effectiveness advantage: By reducing waste and improving molding qualification, it helps automakers achieve component performance upgrades without increasing material costs.