ISO 14343:2009 specifies requirements for classification of wire electrodes, strip electrodes, wires and rods for gas-shielded metal arc welding, gas tungsten arc welding, plasma arc welding, submerged arc welding, electroslag welding and laser beam welding of stainless and heat‑resisting steels. The classification of the wire electrodes, strip electrodes, wires and rods is based upon their chemical composition. ISO 14343:2009 is a combined specification providing for classification utilizing a system based upon nominal composition (system A), or utilizing a system based upon alloy type (system B).