Welding F Numbers. F numbers are groupings of filler metals and A numbers are weld deposit chemistries. Academiaedu is a platform for academics to share research papers.
The following FNumber grouping of electrodes and welding rods in Table QW-432 is based essentially on their usability characteristics which fundamentally determine the ability of welders to make satisfactory welds with a given filler metal. A number is for weld deposit chemical composition not filler metal. Accordingly what does F mean in welding.
According to this line of thinking.
According to this line of thinking. Hard Facing Weld Metal Weld Overlay F-Number 71 to F-Number 72 A-Number. North Americas Largest Fleet of Welding and Positioning Equipment WELDING ELECTRODES CLASSIFICATIONS LOW ALLOY STEEL COATED ELECTRODES CONTD. 31 through F - No.