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General The filler rods Uddeholm Nimax Laser Weld and Uddeholm Stavax Laser Weld are specially composed as to be compatible with the corresponding Uddeholm steel grades and give a weld metal almost identical in composition. The rods are suitable for Laser welding as well as for Micro-Tig welding. Laser welding is suitable when small deposits are preferred. Small indentations, minor build ups, pores, edges or corners etc. In comparison to TIG-welding the heat affected zone (HAZ) will be very thin. Typically 0.1–0.2 mm (0.004–0.008 inch) depending on filler rod dimension and power used. Because of the small deposits the stresses can be kept at a low level. The fast cooling rate increase the risk of developing small cracks in the weld when high alloyed hardenable filler material is used. Adjusting the welding parameters can improve the result.
UDDEHOLM STAVAX LASER WELD
Diameter, mm 0.2 0.3 0.4 0.5 0.6 inch 0.008 0.012 0.016 0.020 0.024
Length 333 mm (13 inch)
Hardness as welded 47–55 HRC
