Quality	Standard	Material No.	Available coatings
HX380LAD	DIN EN 10346	1.0934	+Z, +ZA, +ZF, +ZM, +AZ, +AS

Testing direction	Yield strength Rp02 (MPa)	Tensil Strength Rm (MPa)	Elongation A80 (in %)
Q	380 – 480	440 – 560	≥ 19

The hot-dip galvanized steel HX380LAD in accordance with the EN 10346 standard (material number 1.0934) is a high-strength, micro-alloyed structural steel that has been specially developed for demanding structural and body components in the automotive industry. The targeted addition of niobium, titanium and vanadium creates a fine-grained microstructure, which enables the combination of high strength, toughness and excellent formability. Hot-dip galvanizing is carried out in a continuous dipping process in which the strip sheet is passed several times through a liquid zinc bath and then unwound in a controlled cooling area. This creates a homogeneous, tightly sealed zinc coating that protects the steel from atmospheric and chemical corrosion in the long term and makes it resistant even in demanding environments.

HX380LAD is characterized by a minimum yield strength Rp0.2 of around 380 N/mm², which is achieved thanks to the ultra-fine precipitations of the microalloying elements niobium, titanium and vanadium. The tensile strength is between 440 and 560 N/mm², whereby the elongation at break A80 does not fall below 19 %, thus ensuring sufficient ductility despite the high strength. The fine-grained steel structure, stabilized by the microalloy, prevents grain growth even under thermal stress and at the same time increases notched impact strength, even at low temperatures. The homogeneous hot-dip galvanizing in accordance with EN 10346 also gives the steel a uniformly thick zinc coating, which can be adapted precisely to the requirements in terms of adhesion, passive protection and temperature resistance using different coating alloys – from pure zinc to zinc-magnesium and aluminium-silicon variants.

In the automotive industry, HX380LAD is primarily used where maximum strength is required in combination with complex forming processes and durable corrosion protection. Components such as crash structure components and cross members can be found in today’s vehicle bodies, which significantly improve occupant safety thanks to their high energy absorption in the event of an impact and their notch impact strength. Reinforcements for B-pillars and A-pillars benefit from the narrow deep-drawn contour and achieve even greater rigidity after heat treatment in the paint oven. Chassis and chassis profiles that require an optimized strength-to-weight ratio are also made from this material in order to increase driving dynamics on the one hand and reduce the overall vehicle weight on the other. Finally, the high fatigue strength and excellent corrosion resistance of seat rails and floor beams ensure a long service life and consistent performance over the entire period of use.

The hot-dip galvanized steel HX380LAD (1.0934) in accordance with EN 10346 combines the advantages of a micro-alloyed fine-grain structure with reliable, long-lasting corrosion protection thanks to the zinc coating. With a minimum yield strength of approx. 380 N/mm², tensile strengths of up to 700 N/mm² and sufficiently high ductility, it represents a technically mature solution for safety-critical, weight-optimized and corrosion-stressed components in the automotive industry. The flexibility in the choice of coating alloy also enables precise adaptation to a wide range of environmental and load conditions, making HX380LAD a future-proof choice of material for modern vehicle concepts.