EN 10147

Table of Contents

What is EN 10215?

EN 10215 European Standard specifies requirements for continuously hot-dip aluminum-zinc alloy coated flat products made of low carbon steels for cold forming or of structural steels in thicknesses ≤3.0 mm. The thickness is the final thickness of the delivered product after coating. This European Standard applies to strips of all widths and to sheets cut from it(≥ 600 mm width)and cut lengths(< 600 mm width).The aluminium-zinc alloy composition by mass is nominally 55 % Al, 1,6 % Si, and the balance zinc.

EN 10215 specification covers steel sheets, Aluzinc coated or galvalume coated by the hot-dip process in coils and cut lengths.

en 10215

EN 10215 Equivalent

Chinese standard: GBT 14978

American standard: ASTM A792M

Japanese standard: JIS G3321

EN 10215 Steel grade and Mechanical properties


Commercial Steel grade and Mechanical properties

GradeYield strengthTensile strengthElongation
DX51D500 Max22 Min
DX52D300 Max420 Max26 Min
DX53D260 Max380 Max30 Min
DX54D220 Max350 Max36 Min

NOTE: 1 N/mm2 = 1 MPa

structural steel grade and Mechanical properties

GradeYield strengthTensile strengthElongation
Steel GradeN/mm2%
S250GD250 Min330 Min19 Min
S280GD280 Min360 Min18 Min
S320GD320 Min390 Min17 Min
S350GD350 Min420 Min16 Min
S550GD550 Min560 Min

NOTE: 1 N/mm2 = 1 MPa

Coating Mass

Coating Composition-The 55 % aluminum-zinc coating composition by weight, is nominally 55 % aluminum 1.5 % silicon, and the balance zinc.

For special applications coating masses which are different from those of below table can be supplied. The masses and the relevant surface condition shall be as agreed upon between the producer and the user. Thicker coatings limit the formability and weldability of the products. Therefore, the forming and weldability requirements should be taken into account when ordering the coating mass.

The coating applied shall be of equivalent thickness on both surfaces. The coating mass weight chart design is as follows:

Coating Mass

EN 10215 Design Coating Mass Table
Design Coating MassAverage Triple-Spot TestSing-Spot Test

EN 10215 Surface treatment 

Hot-dip galvalume steel products generally receive a surface protection at the producer’s plant as specified as regular surface treatment as below:

Chemical passivation (C)

Chemical passivation may be carried out after coating to protect the surface against humidity and to reduce the risk of the formation of wet storage stains (known as black rust). Chemical passivation may cause slight discoloration of the surface but is not detrimental to the general performance of the product.

Oiling (O)

This treatment also reduces the risk of formation of black rust.
It shall be possible to remove the oil layer with a suitable degreasing solvent which does not adversely affect the coating. Products supplied oiled may require additional lubrication prior to rolling or drawing.

Chemical passivation and oiling(CO)

Agreement may be reached on this combination of surface treatment if increased protection against the formation of black rust is required.


Hot-dip aluminium-zinc coated flat products are only supplied without surface treatment if expressly desired by the purchaser on his own responsibility.In this case, there is an increased risk of early corrosion during transportation and storage.

This article mainly introduces the American standard EN 10215 technical labeling and common knowledge of galvanized products. I hope this article will help you better understand Hot dip galvalume steel products. If you are looking for a steel supplier or need help, you can contact Witop Steel, we are willing to help you.

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