Uncoated flat steel for automotive applications – VDA239-100

The VDA 239-100 standard defines the requirements for uncoated steels mainly used in the automotive industry, however increasingly valued also in other industrials fields. These materials are designed to deliver high performance in terms of mechanical strength, formability and workability, without the need for protective coatings.

Within the VDS classification there are both high-strength steels intended for structural components where robustness and reliability are essential, and steels specifically developed for stamping processes, ideal for complex parts, panels, lightweight reinforcements and aesthetic components.

The standard distinguishes the various types on the basis of parameters such as tensile strength, elongation, processing behaviour and the microstructure. The standardised nomenclature (e.g. HR500LA, CR290LA) enables to quickly identify the characteristics of the material and its area of application.

VDA 239-100 standard
Sheet steel for cold forming for the automotive industry
Mild Steel	High Strength Steel LA or HSLA	High Strength IF Steel IF	Bake Hardenable Steel BH	Dual Phase Steel DP
Cold	Cold	Cold	Cold	Cold
CR0	CR210LA	CR180IF	CR180BH	CR290Y490T-DP
CR1	CR240LA	CR210IF	CR210BH	CR330Y590T-DP
CR2	CR270LA	CR240IF	CR240BH	CR440Y780T-DP
CR3	CR300LA	CR270IF	CR270BH	CR500Y780T-DP
CR4	CR340LA			CR590Y980T-DP
CR5	CR380LA			CR700Y980T-DP
	CR420LA			CR780Y1180T-DP
	CR460LA
	CR500LA
	CR550LA
Dual Phase Steel with improved formability DH	Multi-Phase Steels with High Global Formability FH	Complex Phase Steel CP	Complex-Phase Steels with Improved Formability CH	Martensitic Steel MS
Cold	Cold	Cold	Cold	Cold
CR330Y590T-DH	CR600Y980T-FH	CR570Y780T-CP	CR780Y980T-CH	CR860Y1100T-MS
CR440Y780T-DH	CR850Y1180T-FH	CR780Y980T-CP	CR900Y1180T-CH	CR950Y1200T-MS
CR700Y980T-DH		CR900Y1180T-CP	CR1000Y1370T-CH	CR1030Y1300T-MS
CR780Y1180T-DH				CR1220Y1500T-MS
				CR1350Y1700T-MS

Surface Quality
U	unexposed
E	exposed

Surface treatment
P	prephosphated
O	oiled

The absence of surface coatings offers concrete advantages: it simplifies welding, reduces processing costs and provides greater flexibility in the choice of subsequent surface treatments (painting, bonding, priming, etc.).

In summary, uncoated steels in compliance with VDA 239-100 are a comprehensive solution for applications requiring strength, production efficiency and design versatility, while ensuring high quality standards and compatibility with modern industrial processes.

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