MAGIZINC®
MANUFACTURING PROCESS
MagiZinc is a cost-effective alternative to conventional hot-dip galvanised sheet. By adding small amounts of magnesium and aluminium to the zinc layer, it is possible to slash the zinc layer of the sheet by half. This means reduced usage of zinc resources, lower environmental impact, better weldability, and scratch resistance. This unique coating forms a stable barrier against corrosion, which results in superior corrosion protection, even in rough environments. MagiZinc has a surface hardness that leads to less precipitation and less friction during deep drawing and roll forming. MagiZinc is manufactured in thicknesses of 0.40 to 2.0 mm.
STEEL GRADES
Mild steel:
Used when forming and drawing properties are more important than
tensile ones. Available in grades ranging from DC01 to DC06.
Structural steel:
Used in the construction industry.
High-strength steel:
Offers great opportunities for weight savings.
Micro-alloyed:
Combines high strength and good plasticity. It has uniform tensile
properties and is intended for simpler forms of drawing and forming.
| MECHANICAL PROPERTIES — SOFT STEELS | |||||
| EN 10 346 | Yield strength Re (N/mm2) |
Tensile strength Rm (N/mm2) |
Elongation A80 min. (%)* |
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| DX 51 D | Min. 140 | 270-500 | 22 | ||
| DX 52 D | 140-300 | 270-420 | 26 | ||
| DX 53 D | 140-260 | 270-380 | 30 | ||
| DX 54 D | 140-220 | 260-350 | 36 | ||
| DX 56 D | 120-180 | 260-350 | 39 | ||
| Values are based on samples taken transversely to the direction of rolling. *) For t ≤ 0.70 mm, two units of a lower value apply. |
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| MECHANICAL PROPERTIES — STRUCTURAL STEELS | |||||
| EN 10 346 | Yield strength Re min.(N/mm2) |
Tensile strength Rm min.(N/mm2) |
Elongation A80 min. (%)* |
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| S 220 GD | 220 | 300 | 20 | ||
| S 250 GD | 250 | 330 | 19 | ||
| S 280 GD | 280 | 360 | 18 | ||
| S 320 GD | 320 | 390 | 17 | ||
| S 350 GD | 350 | 420 | 16 | ||
| Values are based on samples taken along the direction of rolling. *) For t ≤ 0.70 mm, two units of a lower value apply. |
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| MECHANICAL PROPERTIES — HIGH-STRENGTH MICRO-ALLOYED STEELS | |||||
| EN 10 346 | Yield strength Rp0.2 min.-max.(N/mm2) |
Tensile strength Rm min.-max.(N/mm2) |
Elongation A80 min. (%)* |
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| HX 260 LAD | 260-330 | 350-430 | 26 | ||
| HX 300 LAD | 300-380 | 380-480 | 23 | ||
| HX 340 LAD | 340-420 | 410-510 | 21 | ||
| HX 380 LAD | 380-480 | 440-560 | 19 | ||
| HX 420 LAD | 420-520 | 470-590 | 17 | ||
| Values are based on samples taken transversely to the direction of rolling. | |||||
SURFACE COATING
The amount of coating on the sheet is stated in weight grades, the most common one of these being ZMA140. The figure of 140 refers to the total weight of the coating in g/m2 on both sides of the plate, e.g., in connection with a so-called triple test. (A somewhat lower weight is permissible in connection with a so-called single test.)
| Weight class | Zinc layer, incl. both sides (g/m2) | Zinc layer thickness per side* (μm) |
|
| Triple spot test, min. | Single Spot Test min | ||
| ZMA 100 | 100 | 85 | 7 |
| ZMA 140 | 140 | 120 | 10 |
| ZMA 200 | 200 | 170 | 14 |
| ZMA 275 | 275 | 235 | 20 |
| ZMA 310 | 310 | 265 | 24 |
| *) Layer thickness is calculated based on min. triple spot test values (1 μm = 7.14 g/m2) | |||
SURFACE
Surface quality: |
|
| A (Normal surface) | Small pores, rose pattern variations, dark spots, stripe marks and light passivation stains are permissible. Stretch levelling breaks and zinc run-off marks may appear. |
| B (Improved surface) | Skin-passed material. Small defects such as stretch levelling breaks, skin passing marks, scratches, indentations, rose patterns, zinc run-off marks as well as light passivation marks may appear. The surface exhibits no pores. |
Surface treatment: |
|
| C | Chemical passivation (chromium-free) |
| 0 | Oiling |
THICKNESS TOLERANCES, ACCORDING TO EN 10 143
For steel grades with a specified min. yield strength <260.
| THICKNESS TOLERANCES, ACCORDING TO 10 143 (for steel with a specified min. yield strength <260) | |||
| Nominal thickness (mm) | Thickness tolerances for nominal width (mm) | ||
| ≤ 1200 | > 1200 ≤ 1500 | > 1500 | |
| ≥ 0,35 ≤ 0,40 | ± 0,04 | ± 0,05 | – |
| > 0,40 ≤ 0,60 | ± 0,04 | ± 0,05 | ± 0,06 |
| > 0,60 ≤ 0,80 | ± 0,05 | ± 0,06 | ± 0,07 |
| > 0,80 ≤ 1,00 | ± 0,06 | ± 0,07 | ± 0,08 |
| > 1,00 ≤ 1,20 | ± 0,07 | ± 0,08 | ± 0,09 |
| > 1,20 ≤ 1,60 | ± 0,10 | ± 0,11 | ± 0,12 |
| > 1,60 ≤ 2,00 | ± 0,12 | ± 0,13 | ± 0,14 |
| For min. yield strength ≥ 260 < 360 N/mm², tolerances are raised by 15-20 %. For min. yield strength ≥ 360 ≤ 420 N/mm², tolerances are raised by 30-40 %. Narrower tolerances are available at extra charge. |
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