Alloy dental material Lukachrom FH

for dental restorations

Product information "Lukachrom FH" Lukachrom FH (NPA for frame works) / 1000 gr Composition Co 62,5 % Cr 30,0 % Mo 5,0 % W - Niob - Si 1,0 % other Metals < 1,0 % Technical Details Typ NPA-Frame Works Vickers-Hardness 375 Tensile Strenght N/mm² 620 MPa Proof Stress 920 MPa Elastic Modules N/mm² 220 GPa Elongation in % 4,5 % Density 8,2 g/qcm Solidus 1.304° C Liquidus 1.369° C CTE value 14,7 µm/m.k Precautions Avoid occlusal and approximal contact of different alloy types. 5 Adverse reaction Allergies to metals contained in the alloy as well as electrochemically conditioned dysesthesia are possible. In individual cases systemic side effects of metals contained in the alloy have been reported. 6 Step-by-Step instructions 6.1 Sprues 2 - 4 sprues – depending on the size of the frame work should be attached to each object. In order to facilitate flow of way and controlled solidification, wax sprue wire with a diameter of 3 - 4 mm should be attached to the thickest points of the casting without tapering. The length of the sprues must be determined individually by the selection and the position of the sprue former. 6.2 Investing Apply a thin coat of wetting agent to the wax object or spray and then blow it dry carefully (do not use compressed air). Invest the pattern investment. Observe the working instructions of the investment that is used. However, it is not required if a fine-grain investment compound is used. 6.3 Preheating Preheat slowly with the suction system activated. Adhere to the heating rates and holding times given by the manufacturer of the respective investment.