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Low-Carbon Steel:

Continuous hot dip coating. Galvanised.

  Chemical Composition
Classification of symbols Numerical
 classification  
European Standard (EN) Types of coatings available Max. C Max. Si Max Mn Max. P Max. S Max. Ti Total Al. Max. Nb
DX51D 1.0226 EN 10346 +Z +ZA +AZ 0.18 0.50 1.20 0.12 0.045 0.30 - -
DX52D 1.0350 EN 10346 +Z +ZA +AZ 0.12 0.50 0.60 0.10 0.045 0.30 - -
DX53D 1.0355 EN 10346 +Z +ZA +AZ 0.12 0.50 0.60 0.10 0.045 0.30    
DX54D 1.0306 EN 10346 +Z +ZA +AZ 0.12 0.50 0.60 0.10 0.045 0.30 - -
DX56D 1.0322 EN 10346 +Z +ZA +AZ 0.12 0.50 0.60 0.10 0.045 0.30 - -
HX300LAD 1.0932 EN 10346 +Z +ZA +AZ 0.11 0.50 1.00 0.030 0.025 0.15 ≤ 0.1 0.09
HX420LAD 1.0935 EN 10346 +Z +ZA +AZ 0.11 0.50 1.40 0.030 0.025 0.15 ≥ 0.015 0.09

 

Type of coating Description
+Z Galvanised Products (Zinc)
+ZA Products coated with zinc-aluminium alloy
+AZ Products coated with aluminium-zinc alloy

Note: We can supply strips with +ZF (zinc-iron) and +AS (aluminium-silicon) coatings.

 

  Approximate international equivalents
Classification of symbols Numerical
 classification  
European Standard (EN) US (AISI) JAPAN (JIS) CHINA (GB)
                 
DX51D +Z 1.0226 EN 10346 CS Types A, B, C A653 - - DX51D +Z GB/T 2518
DX52D +Z 1.0350 EN 10346            
DX53D +Z 1.0355 EN 10346            
DX54D +Z 1.0306 EN 10346            
DX56D +Z 1.0322 EN 10346            
HX300LAD +Z 1.0932 EN 10346            
HX420LAD +Z 1.0935 EN 10346            
  Mechanical properties and hardness requirements
  Yield strength Tensile strength Elongation
Classification of symbols Numerical
 classification
European Standard (EN) ReL Mpa Rm MPa A80 1) % min.
DX51D 1.0226 EN 10346 - 270 - 500 22
DX52D 1.0350 EN 10346 140 - 300 270 - 420 26
DX53D 1.0355 EN 10346 140 - 260 270 - 380 30
DX54D 1.0306 EN 10346 120 - 220 260 - 350 36
DX56D 1.0322 EN 10346 120 - 180 260 - 350 39

1) The minimum elongation values are decreased by 4 units for thicknesses t ≤ 0.50 mm and 2 units for thicknesses between 0.50 mm < t ≤ 0.70 mm.

 

  Mechanical properties and hardness requirements
Classification of symbols Numerical
 classification 
European Standard (EN) Conventional limit at Rp0.2‚ MPa Tensile strength Rm Mpa Elongation A802), min.
HX300LAD 1.0932 EN 10346 300 - 380 380 - 480 23
HX420LAD 1.0935 EN 10346 420 - 520 470 - 590 17

2) The minimum elongation values are decreased by 4 units for thicknesses t ≤ 0.50 mm and 2 units for thicknesses between 0.50 mm < t ≤ 0.70 mm.

SURFACE QUALITY

PROPERTIES OF THE COATINGS 

GALVANISED STEEL according to EN 10142

 

COATING DENSITY

Designation of the coating Total minimum coating density, both surfaces g/m2 Theoretical reference values for the surface coating thickness in the one-point test (µm) Density g/cm3
Three-point test One-point test Normal value Range
Z100 100 85 7 5-12 7.1
Z140 140 120 10 7-15 7.1
Z275 275 235 20 15-27 7.1
Z450 450 385 32 24-42 7,1
ZA095 95 80 7 5-12 6,9
ZA185 185 155 14 10-20 6,9
AZ100 100 85 13 9-19 3.8
AZ150 150 130 20 15-27 3.8

 

COATING FINISH

Product Type Description
Galvanised products (Z) Normal spangle (N) This finish is the result of the natural solidification of the zinc coating. Depending on the conditions under which galvanising occurs, spangle may not be obtained or zinc crystals of a different size and spangle may be obtained. This does not affect the quality of the coating. If you want a pronounced spangle, this must be explicitly stated when requesting the quote and placing the order.
Minimum spangle (M) This finish is obtained by adequately controlling the solidification process. The spangle on the surface will be reduced, sometimes invisible to the naked eye. You can request this finish if normal spangle (N) does not meet the surface appearance requirements.
Spangle-Free (SF) We are able to supply spangle-free, which is not subject to any standards
Products coated with zinc-aluminium (ZA) The finish of this coating has a metallic sheen which is the result of the free growth of zinc-aluminium crystals during normal solidification. Crystals of different sizes and with different spangles may appear, depending on the manufacturing conditions. This does not affect the clarity of the coating.
Products coated with aluminium-zinc (AZ) alloy The products must be supplied with normal spangle. Normal spangle is a surface finish, it has a metallic sheen which is the result of the free growth of aluminium-zinc crystals during normal solidification.


 SURFACE QUALITY

Quality Description
Normal finish (A): Imperfections such as a grainy surface, marks, grooves, pitting, variations in the surface appearance, dark spots, scratch marks and small passivation defects are allowed. Defects may appear due to tension gradient or local excess thickness. Ribbing may also appear on the coils and yield lines.
Improved finish (B): The B surface quality is obtained through skin passing. For this surface finish, small imperfections such as defects due to tension gradient, skin-pass marks, light scratches, surface structure defects, excess thickness and small passivation defects may be allowed. NOTE: for special applications, subject to an agreement when requesting the quote and placing the order, cold-dipped aluminium-silicon coated products (AS) can be supplied with a bright appearance. The surface is type "B" in this case.
Superior quality (C ): The C surface quality is obtained through skin passing. The controlled surface should make it possible to apply a high-quality paint finish. The other surface must have the surface properties of a B quality finish at a minimum.
Roughness When requesting the quote and placing the order, a surface roughness range (Ra values) must be agreed and verified. This is not applicable to the skin-pass condition (surface quality A).
 

 

PROTECTIVE SURFACE TREATMENT

Finish Description
Chemical passivation (C) Chemical passivation protects the surface against humidity and reduces the risk of corrosion products forming during storage and transportation. The local variations in colour resulting from this treatment are permitted and do not affect the quality.
Oiled (O) This treatment also reduces the risk of corrosion products forming. It should be possible to remove the layer of oil with suitable degreasing solvents which do not have an adverse effect on the coating.
Chemical passivation and oiled (CO) An agreement can be signed to combine these surface treatments if it is necessary to increase the protection against the risk of corrosion products forming.
Phosphated (P) This treatment improves the adhesion and protective effect of the coating applied by the process manager. It also reduces the risk of corrosion during transportation and storage.
Phosphated and oiled (PO) The combination of phosphating and oiling (PO) can improve formability
Sealed (S) Subject to an agreement, the application of a transparent organic film coating, on one or both sides, of approximately 1 g/m². This treatment offers additional protection against corrosion, depending on the type, and increased protection against fingerprint marks. It can improve sliding properties during forming processes and can be used as a primer for a subsequent painting process. The S-type coating must be agreed when requesting the quote and placing the order.
Untreated (U)  

If the customer does not require the surfaces to be oiled and/or chemically passivated, this must be clearly indicated when requesting the quote and placing the order.

 

THICKNESS TOLERANCES

Thickness tolerances according to EN 10143 for nominal widths.
  DX51D DX53D, DX54D, DX56D HX300LAD HX420LAD
Nominal thickness t Normal tolerances for nominal width w Close tolerances (S) for a nominal width w Normal tolerances for nominal width w Close tolerances (S) for a nominal width w Normal tolerances for nominal width w Close tolerances (S) for a nominal width w Normal tolerances for nominal width w Close tolerances (S) for a nominal width w
1200 < w ≤ 1500  1200 < w ≤ 1500 1200 < w ≤ 1500 1200 < w ≤ 1500  1200 < w ≤ 1500  1200 < w ≤ 1500  1200 < w ≤ 1500  1200 < w ≤ 1500
0,20 < t ≤ 0,35 ± 0,06 ± 0,04 ± 0,5 ± 0,035 - - - -
0,35 < t ≤ 0,40 ± 0,06 ± 0,04 ± 0,5 ± 0,035 ± 0,06 ± 0,045 ± 0,07 ± 0,050
0,40 < t ≤ 0,60 ± 0,06 ± 0,045 ± 0,5 ± 0,040 ± 0,07 ± 0,050 ± 0,08 ± 0,060
0,60 < t ≤ 0,80 ± 0,07 ± 0,05 ± 0,6 ± 0,045 ± 0,08 ± 0,060 ± 0,09 ± 0,070
0,80 < t ≤ 1,00 ± 0,08 ± 0,06 ± 0,7 ± 0,050 ± 0,09 ± 0,070 ± 0,11 ± 0,080
1,00 < t ≤ 1,20 ± 0,09 ± 0,07 ± 0,8 ± 0,060 ± 0,11 ± 0,080 ± 0,13 ± 0,090
1,20 < t ≤ 1,60 ± 0,13 ± 0,08 ± 0,11 ± 0,070 ± 0,14 ± 0,090 ± 0,16 ± 0,110
1,60 < t ≤ 2,00 ± 0,15 ± 0,09 ± 0,13 ± 0,080 ± 0,17 ± 0,110 ± 0,19 ± 0,120
2,00 < t ≤ 2,50 ± 0,17 ± 0,12 ± 0,15 ± 0,100 ± 0,20 ± 0,130 ± 0,22 ± 0,150
2,50 < t ≤ 3,00 ± 0,20 ± 0,14 ± 0,17 ± 0,120 ± 0,22 ± 0,150 ± 0,25 ± 0,180
3,00 < t ≤ 5,00 ± 0,24 ± 0,18 ± 0,20 ± 0,16 ± 0,24 ± 0,18 ± 0,27 ± 0,24
5,00 < t ≤ 6,50 ± 0,25 ± 0,20 ± 0,22 ± 0,18 ± 0,25 ± 0,20 ± 0,29 ± 0,26

Measurements in mm..

 

WIDTH TOLERANCES

Tolerances on wide strips obtained by longitudinal cutting of a width of less than 600 mm.
    Standard slitting tolerances for Metalle Schmidt 1) Width tolerances according to EN 10143 for nominal widths of:
Tolerance class Nominal thickness t 3-15 15-50 50-150 >150 w < 125 125 ≤ w < 250 250 ≤ w < 400 400 ≤ w < 600
   t < 0,6 - - - - 0;+0,4 0;+0,5 0;+0,7 0;+1,0
  0,6 ≤  t < 1,0 - - - - 0;+0,5 0;+0,6 0;+0,9 0;+1,2
Normal 1,0 ≤  t < 2,0 - - - - 0;+0,6 0;+0,8 0;+1,1 0;+1,4
  2,0 ≤  t ≤ 3,0 - - - - 0;+0,7 0;+1,0 0;+1,3 0;+1,6
  3,0 <  t ≤ 5,0 - - - - 0;+0,8 0;+1,1 0;+1,4 0;+1,7
  5,0 <  t ≤ 6,5 - - - - 0;+0,9 0;+1,2 0;+1,5 0;+1,8
  0,20 ≤ t < 0,40 0;+0,15 0;+0,15 0;+0,15 0;+0,2 0;+0,2 0;+0,2 0;+0,3 0;+0,5
  0,40 ≤ t < 0,60 0;+0,17 0;+0,18 0;+0,20 0;+0,24 0;+0,2 0;+0,2 0;+0,3 0;+0,5
  0,60 ≤ t < 1,00 0;+0,17 0;+0,18 0;+0,20 0;+0,24 0;+0,2 0;+0,3 0;+0,4 0;+0,6
  1,00 ≤ t < 1,50 0;+0,20 0;+0,20 0;+0,20 0;+0,3 0;+0,3 0;+0,4 0;+0,5 0;+0,7
Close (S) 1,50 ≤ t < 2,00 on request 0;+0,26 0;+0,30 0;+0,32 0;+0,3 0;+0,4 0;+0,5 0;+0,7
  2,00 ≤ t < 2,50 on request 0;+0,26 0;+0,30 0;+0,32 0;+0,4 0;+0,5 0;+0,6 0;+0,8
  2,50 ≤ t ≤ 3,00 on request on request 0;+0,32 0;+0,35 0;+0,4 0;+0,5 0;+0,6 0;+0,8
  3,00 < t ≤ 5,00 on request on request 0;+0,32 0;+0,35 0;+0,5 0;+0,6 0;+0,7 0;+0,9
  5,0 < t ≤ 6,5 - - - - 0;+0,6 0;+0,7 0;+0,8 0;+1,0

Measurements in mm.

1)Other, closer dimensional tolerances under a commercial agreement.

 

SAG TOLERANCES

Nominal width (W) Edge curve tolerances under commercial agreement
Maximum deviation
2000 mm
Thickness (t)
t ≤ 1.20 mm t > 1.20 mm
3 ≤ W < 6 10.00 15.00
6 < W ≤  10 8.00 12.00
10 < W ≤  20 4.00 6.00
20 < W ≤  350 2.00 4.00
Measurements in mm.
* The data contained in this catalogue are for information purposes only and are not under any circumstances, contractual supply conditions. Errors and omissions excepted.
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