Pdf variations the diameter tip of electrode on the resistance spot. The layman might be puzzled by the array of letters and numbers that are printed on the end of welding electrodes. List main elements present in a 6010, 7018, and excalibur 308 electrode. Stick welding smaw shielded metal arc welding electrodes sticksrods are designed for use with specific current types, either ac, dc and some rods can be used with either. Consumers have access to many different types of welding electrodes. Apr 26, 2017 the following two numbers indicate the tensile strength of the material in the rod when the weld is stress relieved. Most of the welding rods will use the aws system which stands for. Welding filler metal classifications, asme ix f numbers a numbers. The f5 group are smaw covered electrodes used for joining stainless steels. It is designed for all passes of api 5lx52 through x70 grade pipe. A slag cover is needed to protect molten or solidifying weld metal from the atmosphere.
These coatings low the rate of moisture absorption in electrodes that have been exposed to the air for extended periods, thus adding an extra degree of. Note that the electrode diameters are given in both fractional and decimal. Jun 26, 2009 electrodes with aws classification numbers ending in 15, 16 or 18 provide excellent lowhydrogen properties and good toughness high impact values to accommodate for residual stress. In resistance welding, the component of a machine through which. Electrode assemblies 1637825xx and 1637826xxx may be used with 5818 threaded holders 18169, 18170, 18171, shown on page 32 electrode assemblies 1637825xx and. Once the students have had an opportunity to research what blueprint. Welding electrode classifications mild steel coated electrodes e7018x e indicates that this is an electrode 70 indicates how strong this electrode is when welded. E7018x e indicates that this is an electrode 70 indicates how strong this electrode is when welded.
In the beginning, when smaw was king of the mountain, the f numbers had more validity. The classification of welding electrodes hg coded welding. Providing innovative welding products and solutions in new. Feb 17, 2011 stick welding electrodesrods numbers, meanings and uses. March 18, 2016 c1222 page 1 of 5 safety data sheet this safety data sheet sds is for welding consumables and related products and may be used to comply with oshas hazard communication standard, 29 cfr 1910. Welding principle of tig ew lding ew lding torch current input argon gas. It is an all position electrode suitable for pipe welding. Each offers features that make it ideal for a certain application. July 8, 20 introduction eureka p20 electrode is a smooth running basic coated stick electrode with low alloy chemistry.
Please practice handwashing and social distancing, and check out our resources for adapting to these times. For thin materials, you will need an electrode that produces soft arcs, such as a 60, also, smaller diameter electrodes will provide shallow penetration to. The first two or three digits indicate tensile strength theresistance of the material to forces trying to pull it apart inthousands of pounds per square inch of the deposited metal. Setting the industry standard with high performing electrodes, wires and hardfacing products. Apr 26, 2017 the first two numbers or three if it is a five digit number indicate the tensile strength in thousands of pounds per square inch psi.
The third number,1, indicates the electrode can be used in every position. There are two usual classifications for welding rods, 60xx and 70xx. An arc welding process that uses a constricted arc between a nonconsumable electrode and the weld pool transferred arc or between the electrode and the constricting nozzle nontransferred arc. The next two numbers give the minimum yield strength that may be expected as shown in table 1a for system a and table 1b for system b. The classification of welding electrodes what do all the numbers refer to that are printed on electrodes.
The latter is a structural quality welding electrode. The next number, a one, two, or three, indicate the position of the joint the electrode is designed to weld. Indicates in what welding positions it can be used. Testing the material in the electrode and the worksheet by testing the. All unitor electrodes are issued a fume class number. Welding safety and introduction to shielded metal arc welding smaw. The electrodes are designed for superior weldability having no spatter, a stable arc, good wet out, and easy slag removal. As soon as the molten metal cools, the weld joint is fused together. Asan to post to this group, send email to material. Shielding is obtained from the ionized gas issuing from the torch. This number also determines the yield strength or point of deformation for low alloy steel electrodes. Providing innovative welding products and solutions in new zealand for over 50 years.
Choosing the right electrode size can prevent poor welds due to low or high current. Welding electrode classification smaw mild steel coated electrodes e7018x e indicates that this is an electrode. Welding rod reference chart typical applications descriptionhow to identify plastic symbol welding rod profiles bumper covers, headlight housings, inner fender liners, splash shields, fan shrouds, gas tanks, underhood parts, interior parts, snowmobile cowls usually black, sometimes gray. In welding applications, electricity is drawn through an electrode, creating an arc of electricity at the tip of the electrode.
The most common forms are wire electrode and rod electrode. Carbon steel ltcs imoat test low and intermediate alloy steel. It may be used as a positively charged anode or as a negatively charged cathode. Factors for selecting the right stick electrode print article june 26, 2009. Our valued clients can avail from us the best welding electrode manufacturing plant. Welding electrode numbers are four to fivedigit numbers that represent the minimum tensile strength the welding rod produces, the position of the electrode, the electrodes coating and the type of current needed. Weld with confidence with our range of welders to suit every application.
The initial two numbers signify the minimum tensile strength, which is determined in pounds per square inch psi. During the smaw process, metal dropletsmade of the melted filler metal from the electrode dig into and melt the base metal. Among all the other types of welding, the stick electrode welding is considered to be portable, simple and reliable. Stick welding is a skill that takes much practice to master, and selecting the correct electrode for the job can be equally challenging. This strength is measured in thousands of pounds per square inch psi. The electrode must be ground sharp unless the welding machine runs on a. The welding fabrication industry needs qualified welder fabricators. Indicates the coating, penetration, and current type used see the classification table below x. Indicates how strong this electrode is when welded. Choosing the right welding electrode is vital to the success of the welding task. What do the first two numbers on an electrode stand for. In arc welding, the currentcarrying rod or rods used to strike an arc between rod and work.
Stick electrode properties and techniques welding guide c2. How to calculating electrode consumption for pipe per weld. Arc welding electrodes of various forms and sizes are used in practice. Current packet carton part no size mm length mm rodskg range amps 2. Jun 23, 2017 the electrode identification system for steel arc welding is set up as follows. The first two numbers or three if it is a five digit number indicate the tensile strength in thousands of pounds per square inch psi. This grouping is made to reduce the number of welding procedure and.
An estimated number of clock hours of instruction that should be required to teach the. Welding electrode article about welding electrode by the. The following two numbers indicate the tensile strength of the material in the rod when the weld is stress relieved. For example, an electrode classified as e80xx has a tensile strength of 80,000 psi. In arc welding processes a number of potential electrocution sources can be. The electrode identification system for steel arc welding is set up as follows. The designation of a covered electrode begins with the letter e.
The number, 60, in an e6012 electrode creates a weld bead with a minimum tensile strength of 60,000 psi. The metalarc electrodes may be grouped and classified as. Work with your group to complete worksheet, using the periodic table of. This cover can be obtained from the electrode coating, which protects the metal from damage, stabilizes the arc, and improves the weld in the ways described below. An electrode is a tool used in arc welding to produce electric arc.
Is there is any formula reg to this kindly help me regards r. The electrode is made up of materials which are similar to that of the metals chosen to be welded. Bridge welding reference manual fhwa us department of. As mentioned by several of our community, f1 through f4 are smaw covered electrodes used on carbon and high strength low alloy steels. See classification table above x indicates what alloys are in this electrode. Pdf resistance spot weld rsw is a welding technology which plays an important. It is suitable for vertical down welding and to weld dirty steels. In india, the following three systems of classification and coding of electrodes. The electrode is recommended for welding joints subject to radiographic examination in pressure vessel, ship building, bridge and storage tank fabrications. Identification of the quality spot welding used non. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Engineered to excellence, these offered products are in compliance with the. These coatings low the rate of moisture absorption in electrodes that have been exposed to the air for extended periods, thus adding an extra degree of reliability to low hydrogen electrodes. An electrode or a welding rod is a wire which is made up of wire and is coated.
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