MAGIZINC®

MANUFACTURING PROCESS

MagiZinc är ett kostnadseffektivt alternativ för konventionell varmförzinkad plåt. Genom att tillsätta små mängder Magnesium och Aluminium i Zink-skiktet kan man halvera zinklagret på plåten. Detta betyder minskad användning av zinkresurser, minskad miljöpåverkan, bättre svetsbarhet och reptålighet. Det unika beläggningsskiktet bildar en stabil barriär mot korrosion. Detta ger överlägset korrisionsskydd, även i utsatta miljöer. MagiZinc har en ythårdhet som gör att den ger mindre avfällningar och mindre friktion vid djupdragning och rullformning. MagiZinc tillverkas i tjocklekar 0.40 – 2.50 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. (%)*
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.
MECHANICAL PROPERTIES — STRUCTURAL STEELS
EN 10 346 Yield strength Re
min.(N/mm2)
Tensile strength Rm
min.(N/mm2)
Elongation
A80 min. (%)*
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.
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. (%)*
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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