In today’s world of increased competitiveness and high pressure on fabricators to increase safety, using metal cored wires for your welding jobs can provide competitive edge. Health and safety aspect has always been an important part of welding works1.
Welding safety at first; manufacturers have a number of options in choosing optimal welding consumables to weld with optimal productivity and lower emission of hazardous substances. Continuing trend towards the
reduction of welder exposure to welding fumes is observed and welding fumes containing hazardous dust particles are controlled. Suppliers of welding consumables have to deliver information on Fume Emission Rate (FER) and/or chemical composition according to ISO 15011.
Outershield MC710-H is widely applied in industry and has gained popularity because it combines ease of use and high productivity with good mechanical properties. Being one of the best electrodes in this group, it reflects the typical advantages of metal cored wires:
► Lower welding costs coming from higher productivity, both on CV and advanced pulse modes,
► More flexible and well directed arc, features helping to reduce training time and increase quality of welds,
► Regular and spatter free welds combined with resistance against porosity,
► Similar to GMAW welding techniques and exactly the same types of power sources applied.
Metal cored wire is a very good solution for thin sheet material, as well as the best solution for semiautomatic welding of multipass welds and thicker plates. Whereas arc welding processes offer different levels of fume emission rates, MCAW (M21) process is positioned between GMAW (CO2) and GMAW (Pulse)2.
Fig.1. Information on fume generation rates, arc welding processes. Source: A Guide to Reducing Welding Fumes, Welding Journal, January 2016, pp. 50-57.
Fume Emission Rate of classical Lincoln Electric and other metal cored is illustrated in a more detailed way on Fig. 2.
Fig. 2. Fume Emission Rate test results: position of standard Lincoln Electric metal cored, E70C-6M class. Test conditions: WFS 11.6m/min, U=31.4-32.4V. Source: internal tests.
Development of testing capabilities and raw materials have created new possibilities. Precise design of flux components and steel have helped Lincoln Electric to achieve leading position in reduction of welding fume and we are proud to present the new Outershield MC710RF-H. The electrode is classified as:
- AWS A5.18: E70C-6M H4,
- EN ISO 17632-A: T 46 3 M M 2 H5.
Fig 3. Customer welding trails. Outershield MC710RF-H 1.2mm.
Fig. 4. Fume Emission Rate as a function of welding current, U=32V.
Red color: LE standard T 46 4 M M 2 H5 grades
Blue color: Outershield MC710-RF-H
Outershield MC710RF-H meets standards of all metal cored wires from the Outershield range:
► Excellent weldability and feedability,
► Spatter free and focused arc,
► Regular welds with very little slag ,
► Good mechanical properties according to classification.
Outershield MC710RF-H offers
24% reduction in Fume Emission Rate comparing to Lincoln Electric standard product.
Professional literature2 (Fig. 1) describes typical range of FER for metal cored wires between 5 and 22mg/s (0,3-1,3g/min). Outershield MC710RF-H presenting FER between 6 and 8 mg/s after welding at industrial parameters is definitely one of the best metal cored wires in the class.
Metal cored wires offer outstanding weldability and productivity combined with reduced emission of fumes. The results of testing have proven that MCAW CV welding is truly Your optimal welding process.
2. A Guide to Reducing Welding Fumes, Welding Journal, January 2016, pp. 50-57.