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MG-60 (AWS A5.28 ER80S-G) In the construction of steel structures, bridges, machinery and pressure vessels, MG-60 can be a dependable CO2 solid wire for welding 590N/mm2- class high strength steel. MG-60 offers persistent mechanical properties and usability with a stable arc in uses over a wide range of welding currents.
Basic Characteristics of MG-60 The unique chemical composition and production process of MG-60 assure excellent mechanical properties and usability. Tables 1 and 2 show chemical composition and mechanical properties of the all- deposited metal respectively.
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It is clear in Fig. 2, that both 0.2% proof strength and tensile strength decrease as the soaking time in postweld heat treatment increases. The two strengths, however, are maintained adequately even when the soaking time is extended to 10 hours. Postweld heat treatment causes a decrease of impact absorbed energy of low-alloy high strength steels and weld metals due to SR embrittlement in general. MG-60 weld metal, however, maintains its impact notch toughness at a sufficient level even after an extended postweld heat treatment as shown in Fig 2.
Important Welding Parameters in Quality Control of High Strength Welds How to control strength and toughness of welds is essential in welding, particularly, high strength steel. Both strength and toughness are affected by the cooling speed of the weld during welding. The cooling speed varies according to heat input and interpass temperatures. Therefore, heat input and interpass temperatures are very important parameters to control |