Quality	Standard	Material No.	Possible type of hot-dip coating
HDT750C	DIN EN 10346	1.0956	+Z, +ZF, +ZM

Testing direction	Yield point Rp0,2 (MPa)	Tensil Strength Rm (MPa)	Elongation A80 (in %)
L	620 – 760	≥ 750	≥ 10

HDT750C is a continuously hot-rolled hot-dip coated complex-phase steel specified in accordance with the DIN EN 10346 standard. This type of steel is characterized by a balanced combination of high strength, outstanding ductility and excellent corrosion resistance. Its particular suitability for demanding industrial applications, especially in the automotive industry, makes it a preferred choice for many manufacturers.

HDT750C offers exceptional mechanical performance thanks to its complex microstructure. This consists mainly of ferrite and bainite, supplemented by martensite, tempered martensite, retained austenite and pearlite as additional phases. The ferrite phase ensures good formability, while the bainite and martensite phases increase strength and hardness. This multiphase structure enables the steel to withstand high mechanical loads while maintaining remarkable formability.

An outstanding feature of HDT750C is its continuously hot-dip coated surface. This process applies a zinc coating to the steel, which serves as effective corrosion protection. This protective layer prevents the steel from oxidizing and therefore significantly extends its service life, which is particularly beneficial in corrosive environments and for outdoor applications.

Thanks to its high strength and ductility, HDT750C is widely used in the automotive industry. It is often used to manufacture safety-relevant components such as body structures and impact protection components. The steel’s ability to absorb high mechanical loads while remaining malleable makes it ideal for these critical applications.

HDT750C is also used in mechanical engineering and the construction industry, where materials that are both robust and flexible are required. Its good weldability and processability facilitate the production of complex components and contribute to the efficiency of manufacturing processes.

A key aspect of HDT750C is its classification as a complex-phase (CP) steel. These steels are characterized by their multiphase microstructure, which contains ferrite and bainite as main phases and martensite, tempered martensite, retained austenite and pearlite as secondary phases. This special structure enables CP steels to combine high strength with good formability, which makes them attractive for numerous industrial applications.

Compared to other complex-phase steels such as HDT600C and HDT980C, HDT750C offers a balanced ratio of strength and formability. HDT600C has higher formability with slightly lower strength, while HDT980C offers higher strength but at the expense of ductility. HDT750C therefore represents an optimum middle ground that combines the best properties of both extremes in many applications.

HDT750C is a versatile and high performance continuous hot dip coated complex phase steel specified to DIN EN 10346. Its unique microstructure gives it an excellent combination of strength and ductility, while the hot-dip coated surface provides additional corrosion protection. These properties make HDT750C an ideal choice for a wide range of industrial applications, particularly in the automotive, engineering and construction industries. Its outstanding mechanical properties and the extended service life due to the corrosion protection contribute to the reliability and efficiency of the components produced.