320LR flux-coated electrodes are a modified version of 320 electrodes, where the “residuals” – carbon, silicon, phosphorus and sulphur are specified at lower maximum levels. Columbium and manganese are also maintained within tighter parameters. These strict controls eliminate hot cracking and microfissuring frequently encountered in austenitic stainless steel. Excellent corrosion resistance against sulfuric acid, phosphoric acid and other chemicals.