Avesta 248SV description: AVESTA 248 SV is designed for welding Outokumpu 248 SV and steel castings with corresponding composition. Applications include propellers, pumps, valves and shafts. AVESTA 248 SV has high safety against cracking, superior to many other martensitic consumables. The weld metal properties, on the whole, are similar to those of the steel. Preheating is normally unnecessary. In cases with heavy wall thicknesses or where considerable shrinkage stresses are to be expected, preheating up to 75 – 150°C is recommended.