Quality	Standard	Possible coatings	Alloy concept
HR0	VDA 239-100	UC, EG, GI, GA, AS, ZM	Non IF or IF

Testing direction	Yield Point Re (MPa)	Tensil Strength Rm (MPa)	Elongation A (in %)	Type 1 A50 (in %)	Type 2 A80 (in %)	Type 3 A50 (in %)	n10-20/Ag
Q	240 – 350	310 – 460	≥ 28	≥ 23	≥ 22	≥ 24	≥ 0,12

Steel grade HR0, defined in the VDA 239-100 standard, forms the basis for hot-rolled steels with basic strength and formability requirements. This basic grade is particularly suitable for simple applications where no extreme forming processes or complex geometries are required. HR0 is characterized by a balanced combination of strength and formability and offers manufacturers a cost-effective solution for numerous standard applications.

Properties of HR0
HR0 is produced by hot rolling, a process that optimizes the material properties to a basic level:

These properties make HR0 a solid choice for applications where technical requirements exist, but no specifically increased material qualities are needed.

Typical areas of application
The areas of application for HR0 are concentrated on less complex applications.

Comparison of HR0 and CR1 (drawing grade)
While HR0 is primarily used as a basic grade for hot-rolled products, CR1, a cold-rolled drawing grade, offers significant advantages for applications with higher requirements in terms of formability and surface quality.

Conclusion
HR0 (basic grade) is an economical solution for simple applications with moderate strength and formability requirements. This hot-rolled steel is ideal for standard applications with low complexity and forms a solid basis for simple components. Compared to the cold-rolled drawing grade CR1, however, HR0 is less versatile, especially in terms of forming and surface properties. This makes HR0 the cost-effective choice for standard requirements, while CR1 is preferable for more precise and visually demanding applications.