BÖHLER alform® 1100-IG is a high-strength solid wire. It suits welding quenched and tempered high-strength steels on working machines, booms, cranes and structures that need a high yield strength.
The wire is fed continuously from the feeder and welded under shielding gas, both by hand with a semiautomatic torch and on mechanised stations.
- Classification EN ISO: 16834-A 89 5 M Mn4Ni2.5CrMo
- AWS classification: A5.28 / SFA-5.28 ER120S-G
- Shielding gas: M21
- Diameters: 1.0 / 1.2 mm
Keep the heat input inside the range given by the steel maker, going beyond it lowers the strength of the joint. Check the contact tip, a worn bore upsets the wire feed and causes burnback. Match the drive rolls to the wire diameter and check the liner, wire slip shows up at once in an unstable arc. The gas choice affects the shape of the face and the amount of spatter, so keep to the mixture given in the classification.
