EN 10215
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 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
| Grade | Yield strength | Tensile strength | Elongation |
| N/mm2 | N/mm2 | % | |
| DX51D | – | 500 Max | 22 Min |
| DX52D | 300 Max | 420 Max | 26 Min |
| DX53D | 260 Max | 380 Max | 30 Min |
| DX54D | 220 Max | 350 Max | 36 Min |
NOTE: 1 N/mm2 = 1 MPa
structural steel grade and Mechanical properties
| Grade | Yield strength | Tensile strength | Elongation |
| Steel Grade | N/mm2 | % | |
| S250GD | 250 Min | 330 Min | 19 Min |
| S280GD | 280 Min | 360 Min | 18 Min |
| S320GD | 320 Min | 390 Min | 17 Min |
| S350GD | 350 Min | 420 Min | 16 Min |
| S550GD | 550 Min | 560 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 Mass | Average Triple-Spot Test | Sing-Spot Test |
| AZ100 | 100 | 85 |
| AZ110 | 110 | 95 |
| AZ120 | 120 | 105 |
| AZ150 | 150 | 130 |
| AZ165 | 165 | 150 |
| AZ180 | 180 | 155 |
| AZ210 | 210 | 180 |
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.
Untreated(U)
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.
