Thickness Standards

 
MINIMUM AVERAGE COATING AND THICKNESS BY AS/NSZ 4680:2006
Article thickness Local coating thickness (µm) Steel thickness (µm) Average coating mass minimum (µm)
(mm) (µm) (µm) (g/m²)
≤ 1.5 35 45 320
> 1.5 ≤ 3 45 55 390
> 3 ≤ 6 55 70 500
> 6 70 85 600
 
MINIMUM AVERAGE COATING AND THICKNESS BY ASTM A123/A123M – 17
Articel thickness Material Category
Structural Shapes & Plate Strip & Bar Pipe & Tubing Wire
(mm) (µm) (µm) (µm) (µm)
≤ 1.6 45 45 45 35
> 1.6 ≤ 3.2 65 65 45 50
> 3.2 ≤ 4.8 75 75 75 60
> 4.8 ≤ 6.4 75 75 75 65
≥ 6.4 100 75 75 80
≥ 16.0
 100 100 75 80
 
MINIMUM COATING THICKNESS AND MASS ON SAMPLES THAT ARE NOT CENTRIFUGED BS EN ISO 1461:2009
Articel thickness Local coating thickness minimum (µm) Local coating mass minimum (µm) Mean coating thickness minimum (µm) Mean coating mass minimum (µm)
(mm) (µm) (g/m²) (µm) (g/m²)
Steel > 6 70 505 85 610
Steel > 3 ≤ 6 55 395 70 505
Steel ≥ 1.5 ≤ 3 45 325 55 395
Steel ≤ 1.5 35 250 45 325
Castings ≥ 6 70 505 80 575
Castings < 6 60 430 70 505
 
MINIMUM AVERAGE COATING AND THICKNESS BY ASTM A153/153M – 16a
 Class of Material Weight (Mass) of Zinc Coating, oz/ft2 (g/m2) of Surface, Minimum
Average of Speciments Tested Any Individual Specimen
Class A: – Castings – Malleable Iron, Steel 2.00 (610) 1.80 (550)
Class B: – Rolled, Pressed, and Forged articles (excpect those which would include under Classes C and D)
B.1. Thickness ≥ 4.76mm, Length > 381 mm 2.00 (610) 1.80 (550)
B.2. Thicknes < 4.76mm, Length > 381 mm 1.50 (458) 1.25 (381)
B.3. Any thickness, Length ≤ 381 mm 1.30 (397) 1.10 (336)
Class C: Fasteners over > 9,52mm in diameter and similar articles, Washers 4,76 and 6,35mm in thickness 1.25 (610) 1.00 (305)
Mẫu D: Fasteners 9,52mm and under in diameter, rivets, nails and similar articles, Washers under 4.76mm in thickness 1.00 (306) 0.85 (259)
 
MINIMUM COATING THICKNESS AND MASS ON SAMPLES THAT ARE NOT CENTRIFUGED TCVN 5408:2007 (ISO 1461:1999)
Articel thickness Local coating thickness minimum Mean coating minimum
(mm) (g/m²) (µm) (g/m²) (µm)
Steel > 6 505 70 610 85
Steel > 3 ≤ 6 395 55 505 70
Steel ≥ 1.5 ≤ 3 325 45 395 55
Steel ≤ 1.5 250 35 325 45
Castings ≥ 6 505 70 575 80
Castings < 6 430 60 505 70
 
COATINGS ARE CLASSIFIED INTO SEVEN CLASSES ACCORDING TO COATING THICKNES JIS H8641:2021
Symbols of classification Example of application a) (informative) Symbols of classification and coating thickness (µm)
HDZT 35 Substrate of 5mm or less in thickness, bolts and nuts of 12mm and over in diameter, washers of over 2.3mm in thickness, etc. For which lumpiness and run of zinc is removed by centrifugation or thin coating thickness is required for functional purposes 35 min
HDZT 42 Substrate of 5mm in thickness for which lumpiness and run of zinc is removed by centrifugation or thin coating thickness is required for functional purposes 42 min
HDZT 49 Substrate of 1mm or over in thickness, bolts and nuts of 12mm and over in diameter, washers of over 2.3mm in thickness 49 min
HDZT 56 Chất nền có độ dày từ 2mm trở lên 56 min
HDZT 63 Chất nền có độ dày từ 3mm trở lên 63 min
HDZT 70 Chất nền có độ dày từ 5mm trở lên 70 min
HDZT 77 Chất nền có độ dày từ 6mm trở lên 77 min
Note a) The thicknesses and diameters given in the column of example of application are nominal dimensions.