AWS A5.18 E70C-GM H4
EN ISO 17632-A T42 4 ZMn M M21 1 H
EN ISO 17632-B T49 4 T15-1 M A-U H5
Nippon Steel’s SM-3A is a copper coated, Seamless Metal cored wire with exceptional arc stability and smooth running.
SM-3A is a metal cored wire which represents the best of Japanese technology in welding wires; seamless, extremely low in hydrogen, double copper coated, meticulous targeted flux for maximum deposition and productivity. You will not find a better performing metal cored wire in the Australian/NZ market.
SM-3A consists mainly of metal flux and this, combined with the concentration of current through the narrow sheath enhancing high melt-off rates, ensures very high deposition and thus high productivity.
The very low hydrogen content of SM-3A, typically 2ml/100g, is retained over time during shipping, storage and use due to the lack of a seam and double copper coating preventing moisture pick-up. This greatly minimises any risk of hydrogen/cold cracking and porosity.
The double copper-coating also enhances current transfer between contact tip and wire resulting in a stable arc, as well as maximising smooth feedability of the wire during use.
Very minimal slag is produced which greatly reduces re-ignition problems and ensures the welding of multiple layers without the need for de-slagging between passes. Together with minimal spatter, virtually no clean-up work is required.
The exacting Japanese engineering and manufacture also ensure perfect roundness of the wire, which produces stable and even wire feeding with no twisting or pig-tailing.
Although mainly used for downhand butt and fillet welding, SM-3A can be run on LORCH MicorMIG welding machines with a customised programme in the short arc range which enables all-positional welding. This unique combination can give a big productivity and safety advantage when large workpieces such as beams can be continuously welded without turning or changing to another wire for out-of-position work.
SM-3A is a Grade 4 wire used with Ar/CO2 mix shielding gas.