Quality | Standard | Material No. | Possible Surface Coating: |
---|---|---|---|
HCT980XG | DIN EN 10338 | 1.0997 | +ZE according to DIN EN 10152 (electrolytically galvanized) |
HCT980XG | DIN EN 10346 | 1.0997 | +Z, +ZF, +ZA, +ZM (Hot-dip coating) |
Testing direction | Yield point Rp0,2 (MPa) | Tensil Strength Rm (MPa) | Elongation A80 (in %) | Bake-Hardening-Index BH2 |
---|---|---|---|---|
longitudinal test specimen | 700 – 850 | ≥ 980 | ≥ 8 | 30 |
C % | Si % | Mn % | P % | S % | Al % | Cr+Mo % | Nb+Ti % | V % | B % |
---|---|---|---|---|---|---|---|---|---|
≤ 0,23 | ≤ 1,00 | ≤ 2,90 | ≤ 0,080 | ≤ 0,015 | 0,015 – 2,0 | ≤ 1,40 | ≤ 0,15 | ≤ 0,20 | ≤ 0,005 |
HCT980XG: An Overview of Cold-Rolled Dual-Phase Steel According to DIN EN 10338 and 10346
HCT980XG is an advanced cold-rolled dual-phase steel specified according to DIN EN 10338 and DIN EN 10346. This steel is characterized by an outstanding combination of high strength and good formability, making it particularly suitable for demanding industrial applications, especially in the automotive industry. The special microstructure of HCT980XG, which includes both ferrite and martensite, gives it its exceptional mechanical properties.
Microstructure and Mechanical Properties
The microstructure of HCT980XG is complex, consisting of a mixture of soft, ductile ferrite and hard, strong martensite phases. This combination allows the steel to achieve high tensile strength while maintaining good formability. The ferrite content ensures the necessary ductility and energy absorption, while the martensite phase increases the steel’s strength and hardness. These properties make HCT980XG an ideal material for applications requiring both high strength and good formability.
Manufacturing Process
The production of HCT980XG follows a precisely controlled process. The steel is first hot-rolled and then cooled in a controlled manner to achieve the desired microstructure. It is then cold-rolled, further refining its fine-grained structure and improving its mechanical properties. A final heat treatment ensures that the balance between strength and formability is optimized.
Continuously Galvanized Variant of HCT980XG According to DIN EN 10346
In addition to the cold-rolled variant, HCT980XG is also available as a continuously galvanized steel according to DIN EN 10346. In this process, the steel is continuously dipped into a bath of molten zinc or a zinc alloy, forming a protective zinc layer on its surface. This coating provides excellent corrosion protection, extending the service life of components and improving their performance in corrosive environments. Thus, the galvanized variant of HCT980XG combines the mechanical advantages of dual-phase steel with enhanced corrosion resistance.
Comparison to HCT980X
HCT980X and HCT980XG are both dual-phase steels with very similar mechanical properties, specified according to the same basic standards (DIN EN 10338). Both steels offer high strength and good formability due to their dual-phase microstructure, which combines ferrite and martensite. The main difference between the two lies in their surface treatment.
HCT980X is a cold-rolled dual-phase steel without additional surface treatment. It is used in applications where corrosion protection is either ensured by other measures or not required. In contrast, HCT980XG is the galvanized variant of HCT980X, manufactured according to DIN EN 10346. The zinc coating of HCT980XG provides excellent corrosion protection, making it particularly suitable for applications exposed to corrosive environments or requiring increased resistance to weathering.
Applications
HCT980XG is primarily used in the automotive industry, where the highest material property standards are required. Due to its high strength and good formability, this steel is particularly suitable for manufacturing safety-relevant body components such as reinforcements, impact beams, and structural elements. The continuously galvanized variant of HCT980XG is ideal for applications that require both mechanical performance and high corrosion protection, such as exterior body panels and underbody components.
Standards and Quality Control
The production and application of HCT980XG follow the strict guidelines of the DIN EN 10338 and DIN EN 10346 standards. These standards ensure that the steel meets high quality and performance requirements. Regular inspections and controls throughout the production process guarantee that the steel’s mechanical properties and corrosion resistance are consistently maintained, ensuring its suitability for intended applications.
In summary, HCT980XG offers an outstanding combination of strength, ductility, and corrosion resistance. Compliance with DIN EN 10338 and DIN EN 10346 standards ensures consistently high quality and performance, making it a preferred choice for modern manufacturing processes and demanding applications.
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