ISO 21952:2012规定了抗蠕变钢的气体保护金属极电弧焊和钨极惰性气体保护焊用焊丝、焊丝和焊条的分类要求，以及焊前或焊后热处理条件下的沉积物要求。可以使用不同的保护气体对一根导线电极进行测试和分类。 ISO 21952:2012是一个综合规范，规定了使用基于焊丝、焊丝和棒材化学成分的系统进行分类，要求所有焊接金属的屈服强度和平均冲击能量为47 J，或使用基于所有焊接金属沉积物的抗拉强度和焊丝的化学成分的系统进行分类，电线和杆子。

ISO 21952:2012 specifies requirements for classification of wire electrodes, wires and rods for gas shielded metal arc welding and tungsten inert-gas welding of creep-resisting steels, and for their deposits in the as-welded or post-weld heat-treated condition. One wire electrode can be tested and classified with different shielding gases. ISO 21952:2012 is a combined specification providing for classification utilizing a system based upon the chemical composition of wire electrodes, wires and rods with requirements for yield strength and average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength of the all-weld metal deposits and the chemical composition of wire electrodes, wires and rods.