Tungsten Electrodes

Non-consumable tungsten electrodes for GTAW (Gas Tungsten Arc Welding)  or TIG (Tungsten Inert Gas) welding, generally are of several types. Types Of Tungsten Electrodes Tungsten electrodes types and their typical application can be identified by color-coded end marks as follows. Pure Tungsten :  Green 2% Ceriated :  Gray 2% Thoriated : Red 2% Zirconiated : Brown 1.5% Lanthanated … Read more

Laser Beam Welding (LBW)

Laser beam welding (LBW) is a welding process that produces coalescence of materials with the heat obtained from the application of a concentrated coherent light beam impinging upon the surfaces to be joined. The focused laser beam has the highest energy concentration of any known source of energy. The laser beam is a source of electromagnetic … Read more

Stud Welding Aluminum

Stud welding Aluminum may be accomplished with conventional arc stud welding equipment, using either the capacitor discharge or drawn arc capacitor-discharge techniques. The conventional arc stud welding process may be used to weld aluminum studs 3/16 to 3/4 in. (4.7 to 19.0 mm) diameter. The aluminum stud welding gun is modified slightly by the addition of … Read more

Pipe Welding Positions

Pipe welding positions are dictated by the job. Pipe welds are made under many different requirements and in different welding situations.  In general, the position is fixed, but in some cases can be rolled for flat-position work. Positions and procedures for welding pipes are outlined below. Horizontal pipe rolled Weld(1) Align the joint and tack weld or … Read more

Hobart MIG Welder

Hobart MIG welder is one of the most commonly used MIG welders in the industry. This article touches upon a few salient features of this machine’s kit. Hobart MIG Welder : MIG Welding Machine Kit The Auto Arc 130 operates off a 115-volt standard household current. It comes ready to weld with or without shielding … Read more

Elements of a Welding Symbol

A distinction is made between the terms “weld symbol” and “welding symbol”. The weld symbol (fig. 3-3) indicates the desired type of weld. The welding symbol (fig. 3-2) is a method of representing the weld symbol on drawings. The assembled “welding symbol” consists of the following eight elements or any of these elements as necessary: … Read more

OxyFuel Welding Flat Position

OxyFuel flat position welding is performed from the upper side of the joint. The face of the weld is approximately horizontal. Bead Welds. In order to make satisfactory bead welds on a plate surface, the flare motion, tip angle, and position of the welding flame above the molten puddle should be carefully maintained. The welding torch … Read more

TIG Welding 4130 Chromoly Tubing

TIG welding 4130 chromoly tubing can be achieved with good results provided right welding techniques are used. 4130 Chromoly steel has an excellent strength to weight ratio, is easily welded, and is considerably stronger and harder than standard 1018 steel. The 4130 grade of Chromoly or chrome-moly is a high-strength low-alloy (HSLA) steel that contains … Read more

TIG Welding Stainless Steel: Gas Coverage

Using the appropriate type and amount of shielding gas is an important way to prevent carbide precipitation when TIG welding stainless steel. Typically, pure argon provides the best results when welding thinner austenitic stainless steel, but the addition of small percentages of helium is not uncommon when better penetration and faster travel speeds are desired, … Read more

Pipe Welding Process

Pipe Welding :  General The most commonly used processes for joining pipes are the manual oxyacetylene process and manual shielded metal-arc process. Automatic and semiautomatic submerged arc, inert gas metal-arc, and atomic hydrogen welding are also used. particularly in shop operations. The manual shielded metal-arc process may be used for welding all metals used in … Read more