Oerlikon Carborod KV3 description: CARBOROD KV3 is a copper coated ER90S-B3 type solid TIG welding rod depositing a 2¼Cr 1Mo weld metal for the welding of creep resistant steels. Suitable for use with Ar shielding gas. CARBOROD KV3 is used for the welding of similar composition and 1/2Mo 1/4V and 1%Cr 1Mo steels. Used in the construction of steam generating plant operating at temperatures <600C. Also suitable for the welding of 1 1/4Cr 1Mo steels where improved resistance to hydrogen attack or corrosion by sulphur is required. Main applications are welding of boilers, plates and tubes as well as in oil refineries e.g. in crack plants produced from mainly 10CrMo9-10 (ASTM A335 Gr. P/T22). CARBOROD KV3 deposits very clean weld metal with a guaranteed Bruscato factor of X<15, and with controlled As, Sb, Sn content to minimise the susceptibility to temper embrittlement. CARBOROD KV3 is specified, where the operational guidelines are given by ASME norms.