Page 162 of 561

LHV-316 N

Unitor LHV-316 N is a heavily coated basic electrode for welding unalloyed, low alloy and some types of yield point controlled steel. It can be used in all positions. Its range of application covers hull plates, deckplates, and stressed or loaded parts such as frames, lifting lugs and electric motor baseplates.

LHV-316 N is specially developed for welding in the vertical-down position. When welding in this position the electrode should travel in a straight line and be kept in light contact with both sides of the groove. The electrode should be held at an angle of 40–85°C to the direction of welding. The electrode can also be used for welding in the flat position and for overhead welding.

A short arc

Unitor LHV-316 N produces a deposit with very good mechanical strength and high crack resistance. The slag from this electrode is very easily removed, even from narrow grooves. LHV-316 N will weld any normal joint, e.g. V-grooves and fillets. It is often used for welding a root bead where LH-314 N is used for the subsequent build-up. This is an economical electrode, maximum welding current can be used also in vertical welding. This makes it possible to weld up to three times faster than normal.

3.01

Joining deck and hull plates

There is little heat transfer to the base material when welding with LHV-316N and deformation and stress is therefore kept to a minimum. The electrode must be protected against humidity and no attempt should be made to weld with damp electrodes. See the section on afterdrying of basic electrodes.

When a large weld cross-section is required, weld a bead on either side of the root bead as shown

161