DESCRIPTION: The WELDWELL PH C18 is a heavy coated rutile electrode with a relatively large amount of iron powder in the coating, thus permitting a larger amount of metal to be deposited very easily. This type is suitable for welding in ALL positions with particularly striking results in vertical down welding. The PH C18 has deep-penetrating properties and thanks to the protective effect of the deep cup, the weld metal is very pure. The slag is easy to remove. Applications: This type owes most of its field of application to the positive root penetration in vertical down welding. Especially in shipbuilding much use is made of this property. In a great deal of work with vertical fillet welds the root run is deposited with PH C18 electrodes, followed by a second and a third, if necessary. When large fillets are required it is good practice to use PH C18 for root runs, then use the vertical up method with PH 48A to complete. Amongst the many attributes of PH C18 is its ability to be used as a cutting or gouging electrode. PH C18 is an excellent means of making very strong Spot Welds in thin plate. The maximum thickness of the upper plate must not exceed 3 mm. There is, of course, no limit to the thickness of the base plate. Welding Techniques For vertical down welding the electrode is held at an angle of about 75o to the direction of travel. When metal plate under 4 mm is welded in this manner the angle of the electrode is adjusted to about 35o and the speed of travel increased. The touch technique must be used. When welding the heavier plate at a 75o angle the formation of a tiny drop of molten iron and slag regularly appears just below the tip of the electrode. This drop is periodically blown away and should instantly reappear, since it is proof of root penetration which is only acquired when the electrode is being held at the correct angle of 75o. Should this phenomenon not appear, eg when welding at an angle of say 60o, slag will be included right in the corner, resulting in lack of root penetration. The function of PH C18 electrodes is influenced unfavourably by rusty, scaly or dirty plate because of the fact that these impurities increase the fluidity of the slag. When metal has to be removed, ie tack welds, fillet welds or to vee out a crack, the PH C18 is excellent.
Recommended Amperages Dia. Length Amperes mm mm 2.5 305 80-120 3.2 380 130-160 4.0 380 150-210 5.0 450 210-300 * Deposition rate at maximum Amps. AC 50V DC + Cutting AC 50V or DC -
Deposition Rate kg/hr * 1.55 2.22 3.60
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AWS A5.1 AS/NZS 1553.1
: :
E7014 E4814-0
WELDWELL
C18 ELECTRODES FOR WELDING MILD STEEL TIP COLOUR FLUX MARKING
Green PH C18 7014 E4814
Approvals: American Bureau of Shipping Lloyds Register of Shipping Bureau Veritas Welding Positions: F, H, V, VD, OH Typical Mechanical Properties of Weld Metal Tensile Strength 494 MPa Yield Value 446 MPa Elongation(1 = 5d) 30% Impact Value Charpy 66 J V Notch at 0oC Typical Chemical Analysis C 0.075% Mn 0.56% Si 0.40% Storage Store electrodes in a dry place. To recondition moist electrodes bake for half an hour at 120oC in a vented oven.