1. welding joins metals by melting and fusing them together with a flame, usually with the addition of a welding filler metal.
2. Properly made, the welded joint is at least as as the metals joined.
3. temperatures can cause problems, such as possible distortion and warping of the base metals or stresses around the weld area.
4. Oxygas welding is generally carried out using the flame setting which has equal quantities of oxygen and acetylene.
5. Because steel melts at a temperature above 2,730 degrees F, the mixture of oxygen and is used as it is the only gas combination with enough heat to weld steel.
6. The deciding factor that determines whether a technique is considered forehand or backhand is the of the torch and rod during welding, not the direction of welding.
7. The method is used in all positions for welding sheet and light plate up to 1/8 of an inch thick.
8. The method is best for welding material more than 1/8 of an inch thick.
9. The faces of square edges can be butted together and welded on plate up to of an inch thick.
10. Plate more than of an inch thick requires beveled edges and a root opening of 1/16 of an inch.