Thanks all for your responses.
We're using GMAW with ER100S to weld 12560 to itself or 41600, and ER70S to weld either to A572.
My question about ASTM or UNS identification is just an attempt to determine an AWS B2.1 - M# for material grouping.
Tim
Henry,
Many of the manufacturers suggest E70 Electrodes for their wear plate material and armor plate. The lower strength filler metal is much more forgiving of the lack of ductility in the base metal and also possible base metal/weld metal dilution.
As the weld metal tensile strength goes up, the need for preheat increases with AR plate.
If a product were being designed based upon the mechanical properties and actual thicknesses of the base metal, then the filler metal would need to match the stress levels to be encountered at the joint. I just don't think thats what is done with AR plate that much but when it is, then the weld metal should be matched accordingly.
Hope all is well.
Gerald