diamondspark 550 MC is a seamless, high strength metal-cored wire alloyed with nickel and molybdenum, with a yield strength above 550 MPa. It is used on working machines, booms, cranes and structures where a high yield strength matters.
Base materials include S420N, S460N, S420M, S460M, S460Q, S555Q and S460QL. The seamless construction limits moisture pick-up in the core and keeps the hydrogen level in the weld low.
- Classification EN ISO: 18276-A T 55 6 1NiMo M M21 1 H5
- AWS classification: A5.28 / SFA-5.28 E90C-K3H4
- Shielding gas: M21
- Diameters: 1.2 / 1.4 / 1.6 mm
- Approvals: CE
Do not exceed the permitted interpass temperature, an overheated heat affected zone loses its toughness. Keep the gas cover complete, without a full slag layer the pool is more sensitive to draughts. Check the feed roll pressure, a metal-cored wire is easier to crush than a solid one. Match the diameter to the material thickness and the welding position, thinner wires are easier to control out of position.
