Galvanized Overheadshield Wire

Galvanized Overheadshield Wire

Galvanized Wire is made to ASTM B498; ASTM A 475; BS 183 etc. The metallic zinc coatings applied by the galvanizing process are an effective way of combating corrosion in steel. Galvanized wire for cable application is available in a Class A coating; Class B coating and Class C coating.
Class A coatings are smoother, however less corrosion resistant than heavy galvanized coatings and are often used in normal wire working applications. Some typical end users include cages, bucket handles, coat hangers and baskets.
Class B and Class C coatings are used in conditions where atmospheric corrosion is severe. End users include crop support wires where chemicals are used, pool fencing or chain mesh in coastal areas.
Additional Info
Diameter Range: 1.57 -4.00 mm
Structure: 1*7; 1*3; 1*19
Galvanised Wire Working Specifications
Given that galvanized wire is classified according to the amount of zinc coating, the following table outlines the difference between standard, heavy galvanized and extra-high galvanized wire.
Nominal Diameter  (g/m2)               Standard Galv.  Heavy Galv.  Extra-high Galv.
over 1.6 mm up to and incl. 1.90mm            210         420           630
over 1.90mm up to and incl. 2.30mm            220         440           660
over 2.30mm up to and incl. 2.70mm            230         460           690
over 2.70mm up to and incl. 3.10mm            240         480           720
over 3.10mm up to and incl. 3.50mm            260         520           780
over 3.50mm up to and incl. 3.90mm             270         540           810

Tensile Strength (Mpa)
The tensile strength is defined as the maximum load achieved in the tensile test, divided by the cross-sectional area of the wire test piece. Galvanized Wire is produced using soft, medium and hard grade wires. The following table specifies the tensile range according to the grade:
Stress at 1% Elongation
Nominal Wire Diameter                                    Stress at 1% Elongation (Mpa)
                                                               Class A     Class B            Class C
over 1.6 mm up to and incl. 2.30mm                        1310      1240        1170
over 2.30mm up to and incl. 3.05mm                        1280      1210        1140
over 3.05mm up to and incl. 3.60mm                        1240      1170        1100
over 3.60mm up to and incl. 4.80mm                        1170      1100        1070
Tensile Stength
Nominal Wire Diameter                              Tensile Strength (Mpa)
       Class A         Class B       Class C
over 1.6 mm up to and incl. 2.30mm               1450         1380        1310
over 2.30mm up to and incl. 3.05mm              1410          1340       1280
over 3.05mm up to and incl. 3.60mm              1410          1340       1280
over 3.60mm up to and incl. 4.80mm               1380          1280       1240
Please note that the sizes mentioned above are indicative only and do not specify the size range available from my products range.
Elongation
Nominal Wire Diameter                                   10in Elongation (%)
                                                        Class A       Class B       Class C
over 1.6 mm up to and incl. 2.30mm                 3              3                3
over 2.30mm up to and incl. 3.05mm                3.5             3                3
over 3.05mm up to and incl. 3.60mm                 4               3               3
over 3.60mm up to and incl. 4.80mm                 4               4               4
Steel Chemistry
A combination of steel grades is used and heat treatment processes to manufacture soft, medium and hard tensile grades. The table below is indicative only of steel chemistries used.

Tensile Grade  % Carbon        % Phosphorus  % Manganese        % Silicon    % Sulphur
Normal           0.5~0.85           0.035          0.5 ~1.10           0.10~0.35         0.045