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MERCANTA

www.mercanta.com Protection Shade Welding Process Arc Plasma Cutting Coated Electrodes MIG with Steel Stock MIG with Light alloys WIG MAG Hollow Electrodes Arc Plasma Welding 5 0,5 - 1,3 A 6 1,4 - 2,6 A 7 2,7 - 5,0 A 8 5,1 - 9,9 A 9 20 - 39 A 5 - 19 A 10 - 15 A 10 40 - 79 A 80 - 99 A 80 - 99 A 20 - 39 A 40 - 79 A 125 - 174 A 16 - 30 A 11 50 - 140 A 80 - 174 A 100 - 174 A 100 - 174 A 40 - 99 A 80 - 124 A 175 - 224 A 12 150 - 249 A 175 - 299 A 175 - 249 A 175 - 249 A 100 - 174 A 125 - 174 A 225 - 274 A 13 250 - 400 A 300 - 499 A 250 - 349 A 250 - 349 A 175 - 249 A 175 - 299 A 175 - 349 A 14 500 - 560 A 350 - 499 A 350 - 499 A 250 - 400 A 300 - 449 A 350 - 449 A 15 500 - 549 A 450 - 699 A 450 - 549 A 16 > 550 A > 700 A > 550 A 3.0 MIG/MAG and TIG Welding A high precision application using the electric arc welding technique. Recommended Protection Shades for Gas Welding * ad 1,7 a: Only supplied as a laminated glass ** ad 5b: The most popular protection shade for gas welding Recommended Shades for Electric Welding Suggestion for determining the right degree of protection: For the selected method of welding, the current density is read in Amps at the transformer. Example: Arc plasma cutting with 170 A. This value lies between 150 and 249 A. Therefore, protection shade 12 must be used. When welding with an extended arc it is imperative to use the next shade of density up. Under prolonged conditions of extreme heat, a mirror coated glass should be used to reflect the excess of radiated heat. Protection Shade Application 1,7 a For welding assistants, against UV radiation and bright stray light * 2 Light flame cutting work 2,5 3 Flame cutting, brazing and light metal welding 4 Welding and brazing up to 70 I acetylene per hour, flame cutting up to 900 I oxygen per hour, steel and grey cast-iron welding, light alloy welding 5 b Welding and brazing with 70 to 200 I acetylene per hour, flame cutting with 900 to 2000 I oxygen per hour ** 6 Welding and brazing with 200 to 800 I acetylene per hour, flame cutting with 2000 to 4000 I oxygen per hour 7 Welding and brazing with more than 800 I acetylene per hour, cutting and bevelling with 4000 to 8000 I oxygen per hour 8 Cutting with more than 8000 I oxygen per hour Welding Method Type of Welding Heat Involved Main Applications Used for Welding of Welding Material Oxy-acetylene welding / cutting gas high heat will spread over a large space of material installations, boilers, pipelines, brazing, cutting iron, copper, all noniron metals gas welding rods Electric arc welding electric medium to high heat will be punctual repair jobs, special applications in any production all, especially iron, NiCr, high alloyed metals wrapped and unwrapped electrodes MIG / MAG welding gas medium to high heat will be punctual any production, every- where where a quick welding is required all, especially iron, aluminium, NiCr special wires on spools TIG welding gas very low heat will be punctual high precision welding all TIG rods 19 50,5 - 1,3 A 61,4 - 2,6 A 72,7 - 5,0 A 85,1 - 9,9 A 920 - 39 A 5 - 19 A 10 - 15 A 1040 - 79 A 80 - 99 A 80 - 99 A 20 - 39 A 40 - 79 A 125 - 174 A 16 - 30 A 1150 - 140 A 80 - 174 A 100 - 174 A 100 - 174 A 40 - 99 A 80 - 124 A 175 - 224 A 12150 - 249 A 175 - 299 A 175 - 249 A 175 - 249 A 100 - 174 A 125 - 174 A 225 - 274 A 13250 - 400 A 300 - 499 A 250 - 349 A 250 - 349 A 175 - 249 A 175 - 299 A 175 - 349 A 14500 - 560 A 350 - 499 A 350 - 499 A 250 - 400 A 300 - 449 A 350 - 449 A 15500 - 549 A 450 - 699 A 450 - 549 A

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