Thermanit MTS 3 is a low-alloyed, creep resistant solid wire. It suits welding CrMo steels in power generation, on superheaters, headers and pressure piping in chromium molybdenum steel.
It joins materials such as 1.4903 and 1.4955, and the deposit stands up to creep at elevated temperature.
- Classification EN ISO: 21952-A G CrMo 9 1
- AWS classification: A5.28 / SFA-5.28 ER90S-B91
- Shielding gas: M12, M13
- Diameters: 0.8 / 1.0 / 1.14 / 1.2 mm
Plan the preheating and the post weld heat treatment to the WPS for the grade in hand, CrMo steels harden in the heat affected zone. Match the drive rolls to the wire diameter and check the liner, wire slip shows up at once in an unstable arc. Watch the wire stick-out from the contact tip, too long a one lowers the arc voltage and worsens the fusion. Thinner diameters suit root runs and thin sheet, thicker ones the fill passes.
