Abstract: Using low-carbon steel core wire and alloy elements transferring through coating,a new kind of high efficient reddening free stainless steel electrode was successsfully devdoped.The electrode can completely substitute electrode A102(E308).In this paper,the factors of stainless steel electrode coating that affect weld hydrogen porosity were analyzed.The results indicated that the addition of iron-oxide increased weld porosity,and the increasing of marble and fluorspar contents in the coating would decrease the porosity.By computer aided system,components of the electrode coating were designed through one time orthogonal regression.Testing proved that the properties of the electrode had satisfied the standard GB983-1995,furthermore,the usability of the electrode is excellent.