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	Arc Welding
		Manual metal arc (MMA) welding is often referred to as shielded arc welding (SMAW) in the USA.
		The levels of these welding parameters depend to a large extent on the type of metal to be welded, the welding position and the specifications as to the quality of the welded joint.
		During welding the core conducts the welding current and is melted and fused with the base metal to form one continuous weld.
	www.iu.hio.no /kurs/efc/welding/arc_welding.htm (1093 words)

	Welding Schools. Find The School That Is Right For You.
		The may perform manual welding, or semi-automatic welding, in which the welder uses a computerized or robotic device to manage the welding task.
		Arc welding is the most common type of welding.
		During arc welding an electrical current is used to create enough heat in the welding rod to melt it as well as the metal which is being welded.
	www.welding-schools.com (359 words)

	Shielded metal arc welding - Wikipedia, the free encyclopedia
		Shielded metal arc welding (SMAW) is also known as stick welding or manual metal arc welding (MMA) and is one of the most common forms of welding.
		An electric current (either alternating current or direct current from a welding power supply) is used to form an arc between an electrode coated in flux and the metals to be joined.
		When arc welding, good eye protection is needed to prevent the intense light and heat from the arc from burning holes in the retinas of the eyes, where the eye's lens has focussed it; this causes vision damage which is sometimes called arc eye.
	en.wikipedia.org /wiki/Manual_metal_arc_welding (473 words)

	Arc lamp - Wikipedia, the free encyclopedia
		An arc lamp is a device that produces light by the sparking (or arcing, from voltaic arc or electric arc) of a high current between two carbon rod electrodes.
		The arcs were enclosed in a small tube to slow the carbon consumption (increasing the life span to around 100 hours).
		The arc lamps were soon superseded by the more efficient and longer-lasting filament lamps in most roles, remaining in only certain niche markets such as cinema projection and search lights.
	en.wikipedia.org /wiki/Arc_lamp (351 words)

	Welding - Open Encyclopedia (Site not responding. Last check: )
		Welding is the joining together of materials (typically metals or thermoplastics), usually by a fusion process.
		Most commonly, workpieces are welded by melting both of them and adding more molten metal or plastic to form a pool that cools to form a strong joint.
		Welding differs from soldering and brazing in that enough heat is applied to melt the materials to be joined.
	open-encyclopedia.com /Welding (124 words)

	Welding (IARC Summary & Evaluation, Volume 49, 1990)
		Decreased fertility was seen in both male and female rats exposed to welding fumes; and the rate of fetal death was increased in pregnant female rats exposed to welding fumes.
		Fumes from the manual metal arc welding of mild steel or cast iron using a nickel electrode increased the frequency of sister chromatid exchange, but not of chromosomal aberrations, in mammalian cells in vitro.
		Fumes from the manual metal arc or metal arc welding of stainless-steel and from manual metal arc welding of mild steel, but not the fumes from metal inert gas welding on mild steel or from mild steel welding with a nickel electrode, were mutagenic to bacteria.
	www.inchem.org /documents/iarc/vol49/welding.html (1108 words)

	CHAPTER 7 SHIELDED METAL-ARC WELDING AND WEARFACING
		The shielded metal-arc welding process, referred to as metallic-arc welding, arc welding, or stick welding, is extensively used in welding ferrous and nonferrous metals.
		Arc welding provides you the ability to join two metals by melting them with an arc generated between a coated-metal electrode and the base metal.
		Arc blow causes the arc to wander while you are welding in corners on heavy metal or using large coated electrodes.
	www.tpub.com /steelworker1/65.htm (2013 words)

	Aussie Weld Introduction to Arc Welding (Site not responding. Last check: )
		DC welding generators, powered by petrol or diesel engines or as an attachment for the farm tractor extend the availability of the process to field usage.
		Manual metal-arc welding, the subject of this booklet, is not difficult, but like all practical arts, the learning of the basic principles and correct techniques at the start is the only real basis for its successful application.
		Weldability of Metals and Alloys 12 - 13
	www.aussieweld.com.au /arcwelding (297 words)

	Knowledge Zone (Site not responding. Last check: )
		Welding Current is largely determined by the type of electrode, the type of job and the material to be welded.
		Metal Inert Gas (MIG)/ Metal Active Gas (MAG) welding is the most popular of the arc welding processes, this is mainly because it is easy to use and versatile.
		Tig welding is fairly easy to learn and is probably the most versatile of the arc welding processes, the down side is that it is slow and equipment can be prohibitively expensive for all but professional welders.
	www.thewelderswarehouse.com /kz.html (3164 words)

	Aussie Weld Introduction to Arc Welding - Basic Principles of Welding - Aspects of Electricity (Site not responding. Last check: )
		It produces a slag which assists in the protection of the molten metal and the dual function of scavenging the metal of unwanted impurities and mechanically molding it to a suitable contour in the positions and applications for which the electrode was designed.
		The arc welder is restricted in Australia to a maximum of 80 volts (open circuit) on the welding power side and at this voltage it may generally be considered as "safe".
		Welding on galvanized iron can give rise to copious fumes, which cause temporary nausea if ventilation is inadequate and similar precautions should be taken with painted and other coated surfaces.
	www.aussieweld.com.au /arcwelding/page3/page3.htm (1067 words)

	Procedures: Copper Welding
		Welding processes such as Gas Metal Arc Welding and Gas Tungsten Arc Welding are commonly used for welding copper and its alloys, since high localized heat input is important when welding materials with high thermal conductivity.
		Manual Metal Arc Welding of Copper and Copper alloys may be used although the quality is not as good as that obtained with the gas shielded welding processes.
		Forehand welding is preferred for Gas Tungsten Arc Welding of Copper with stringer beads or narrow weave beads.
	www.brazing.com /techguide/procedures/copper_welding.asp (2417 words)

	Welding in TutorGig Encyclopedia
		weld nugget or by forging the joint as it is heated to the welding temperature by resistance..
		Resistance welding refers to a group of welding processes that produce coalescence of the faying surfaces with the heat obtained from resistance of the workpieces to the flow of the welding current in a circuit..
		Arc welding refers to a group of welding processes that use a welding power supply to create an electric arc between an electrode and the base material to melt metals at the welding point.
	www.tutorgig.com /es/Welding (897 words)

	ARC WELDING POSITIONS
		The types of welds, joints, and welding positions used in manual-shielded metal arc welding are very similar to those used in oxygas welding.
		This bead or layer of weld metal must be thoroughly cleaned to remove all slag and dirt before the second layer of metal is deposited.
		In making multipass welds, as shown in figure 7-18, the second, third, and fourth layers of weld metal are made with a weaving motion of the electrode.
	www.tpub.com /steelworker1/68.htm (726 words)

	Job knowledge for welders 2: The manual metal arc process.
		When an arc is struck between the metal rod (electrode) and the workpiece, both the rod and workpiece surface melt to form a weld pool.
		Weld penetration is low and the quality of the weld deposit is highly dependent on the skill of the welder.
		Arc stability, depth of penetration, metal deposition rate and positional capability are greatly influenced by the chemical composition of the flux coating on the electrode.
	www.twi.co.uk /j32k/protected/band_3/jk2.html (894 words)

	Arc Welding Electrodes,Stainless Steel Electrodes Manufacturer,Arc Welding Electrodes Manufacturer,Stainless Steel ...
		The weld bead is evenly rippled and due to the higher tensile strength and ductility of the deposit, satisfactory weld can be made on heavy and highly stressed sections.
		The weld deposit is radiographic quality and is highly resistant to cracking, corrosion, scaling at 350°C and resistant to oxidation even at 800ºC. The electrode deposits a highly polished weldment with excellent welding characteristics and slag easy detachability.
		The weld metal shows excellent mechanical properties in combination with high creep strength and it is resistant to cracking and pitting corrosion even at 850°C due to the presence of Mo. With an easily removable slag the electrode deposits a smooth and fine rippled bead with an arc which is easy to strike and re-strike.
	www.eurekaelectrodes.com /low-heat-input-welding-electrodes-etectic-castolin-equivalent.html (1506 words)

	Materials Engineering (UK) Manual Metal Arc Welding (Site not responding. Last check: )
		The arc and the weld pool are shielded by gases and slags which result from the decomposition of the electrode coating.
		The electrode material is transferred across the arc to fill/fuse the joint and the operator must feed in the electrode to maintain a constant arc length.
		Designed to insulate the operator from the currents and voltages used during welding and to enable the electrode to be firmly clamped in position, to facilitate access to joints.
	www.meg.co.uk /meg/app03.htm (909 words)

	Bakery
		Welding is a process of joining two or more parts of metal.
		Though there are a number of well-established welding processes but arc welding with coated electrodes is still the most popular welding process in all over the world.
		Arc welding in its present form started in 1880’s however, the demand for large scale production of heavy items like ships, pressure vessels, construction of bridges etc. provided the necessary impetus for welding to come of age.
	www.nos.org /welding.htm (446 words)

	Afriweld - Stick Integral Pulse Welding (MMA) (Site not responding. Last check: )
		Manual metal arc welding, known as MMA welding for short, is one of the oldest welding processes still in use today.
		Later on the electrodes were coated with materials that made welding easier, protected the weld metal and had a metallurgic affect on the process.
		In Germany the last process mentioned is known as manual arc welding or MMA welding for short, and is characterised by the arc arcing between a melting electrode and the molten bath (Figure 1).
	www.afriweld.co.za /mma.asp (404 words)

	Seamless tube and pipe Welding (Site not responding. Last check: )
		Suitable welding methods are manual metal-arc welding with covered electrodes or gas-shielded arc welding.
		Matching filler metals are recommended in order to obtain a weld metal with optimum corrosion resistance and mechanical properties.
		These filler metals can also be used for welding Sandvik SAF 2205 to carbon steels, stainless steels and nickel base alloys.
	www.smt.sandvik.com /sandvik/0140/internet/se01598.nsf/cdatas/97B8426DE10CB062CA2569ED0005A115 (157 words)

	Redwing Boots - Kromer Welding Caps - Welding Jobs - Welding Caps - Welders - Coded Welders - Welding Helmets - Lapco - ...
		Ultrasonic welding of injection moulded components Part 1
		Ultrasonic welding of injection moulded components Part 2
		Health risks from fume and gases during welding
	www.ukwelder.com /wk_menu.php (170 words)

	Mma and so on... (Site not responding. Last check: )
		Metal cored wire, mig and mma are in focus at ESAB AB (europe).
		Manual Metal Arc Welding or MMA is also known as shielded metal arc, stick welding, or electric arc welding.
		MIG/MAG welding is a versatile process, which can deposit weld metal at a very high rate and in all positions.
	www.esab.com /europe/mma (175 words)

	Manual Metal Arc Welding, Stellite Welding Electrodes, Cobalt Welding Electrodes and Nickel Alloy Welding Electrodes (Site not responding. Last check: )
		Ideal electrode for contact welding and mitred fillets joints and deposits smooth even weld appearance for extra efficiency and deposits a weld metal recovery rate of 180%.
		As well as being welding electrode manufacturers, we produce a wide range of stellite welding electrodes, cobalt welding electrodes cast iron welding electrodes, nickel alloy welding electrodes and stainless steel welding electrodes and rods.
		Standard welding involves using metal clips, one clip is attached to a section of the item to be welded and the second is connected to a welding rod.
	www.mwa-international.com /products.asp?ID=4 (794 words)

	Welding parameter tests for stainless steel welding (Site not responding. Last check: )
		This table shows the range of welding processes and parameters that were selected for evaluation in the first phase of the work.
		In order to keep the programme of work manageable, it was decided to limit the scope of the investigation to stainless steel welding, which was selected because it is the most common type of welding that produces hazardous fume.
		The processes selected for investigation were manual metal arc welding (MMA), metal active gas welding (MAG), and gas-shielded and self-shielded flux cored arc welding (FCAW); and a wide range of welding parameters were varied, including the obvious ones like voltage and current.
	www.aiha.org /aihce01/handouts/pf127howe/sld009.htm (103 words)

	Anionics Inc. Electron Beam Welding, Dunnage Washing, Vacuum Impregnation, TIG MIG Welding
		In the TIG process, the arc is formed between a pointed tungsten electrode and the workpiece in an inert atmosphere or argon or helium.
		An arc is formed between the electrode and the components to be welded.
		In manual welding, the relatively small arc is ideal for thin sheet material or controlled penetration.
	www.anionics.com /tig_weld.html (308 words)

	Manual metal arc welding guide published: News from ESAB Group
		A Manual Metal Arc Welding guide to ESAB's extensive range of MMA power sources and remote control units also describes the company's range of complementary remotes.
		TIG welding is also possible with the next family in the MMA range, the LHN Caddy Professional.
		For operation in particularly harsh environments, the LHF Offshore series of machines delivers reliable results due to features such as vertical static characteristics (ie the welding current is constant, regardless of cable length, arc voltage and other factors), a high open-circuit voltage that ensures excellent striking capabilities, and compensation for variations in mains voltage.
	www.manufacturingtalk.com /news/esa/esa133.html (457 words)

	Manukau Institute of Technology : Industry : Courses
		Welding training courses at Manukau Institute of Technology are part of this New Zealand-wide scheme as well as being linked to the New Zealand Qualifications Framework administered by the New Zealand Qualifications Authority (NZQA).
		Considerable practice is required before welding test pieces are able to be completed competently and a welding certificate is received.
		The New Zealand Modular Training Scheme for the Joining of Metals is a system of welding training courses aimed at encouraging new welders to take up welding as a career and to upskill, retrain and further qualify existing industry personnel.
	www.manukau.ac.nz /industry/Techmark2.asp?Dept=14&submit1=Submit (482 words)

	Safety Data Electrodes (Site not responding. Last check: )
		Welding consumables applicable to this sheet as shipped are non-reactive, non-flammable, non-explosive and essentially non-hazardous until welded.
		Welding fumes present a hazard, not the ingredients of the electrode.
		The composition and quantity of these are dependent upon the metal being welded, procedures, electrode type and electrode size.
	www.weldwell.co.nz /msds/sdelectrode.htm (1071 words)

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