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Surface treatment of forge-welded gratings

 

Steels S235JR, S355J2G3:


 
Abstract from EN ISO 1461
Minimum Zinc coat layer thickness on steel
 
Steel parts in thickness
t
[mm]
 Local coating
(minimum)
 [μm]
Mean coating
(minimum)
 [μm]
t < 1,5 35 45
1,5 ≤ t ≤ 3 45 55
3 < t ≤ 6 55 70
t > 6 70 85


Abstract from EN ISO 9223
Corrosivity categories
 
Corosivity
category
Corrosion
level
Corrosion material loss
Steel [μm/year] Zinc [μm/year]
C1 Very low less than 1,3 less than 0,1
C2 Low 1,3 to 25 0,1 to 0,7
C3 Medium 25 to 50 0,7 to 2,1
C4 High 50 to 80 2,1 to 4,2
C5 Very high 80 to 200 4,2 to 8,4
CX Extreme 200 to 700 8,4 to 25




 

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Forge-welded gratings, pressure-locked gratings, stair treads, perforated metal planks, spiral staircases, GRP gratings and ladder rungs. Various material variants (steel, stainless steel, aluminium) with various surface finishes.
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