ASTM F15 Alloy

Danyang City KaiXin Alloy Material Limited Company ASTM F15 Alloy,kovar alloy,Nilo-K, UNS K94610 ,(FeNi29Co17) Chinese 4J29,YB/T5231-2005 ,(FeNi29Co18),Lockinvar, Alloy 12B,Sealing Alloy. A Nickel-Iron-Cobalt, controlled expansion alloy containing 29% Nickel. It's coefficient of expansion (which decreases with rising temperature to the inflection point), matches the expansion rate of borosilicate glasses and aluminia ceramics. Applications include glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high-power transmitting valves, transistor leads and heaters and photography flash bulbs. Looking forward to cooperating with you! 1.Alloy grades and chemical composition consistent with the provisions of table 1 the chemical composition of Kovar(%) C P S Mn Si Cu Cr Mo Ni Co Fe Not more than≤ 0.03 0.020 0.020 0.5 0.30 0.20 0.20 0.20 28.5-29.5 16.8-17.8 balance 2.The tensile strength of wire in line with the provisions of Table 2Status code StateTensile strength,N/mm2R1/4I1/2I3/4IISoft state 1/4 Hard state1/2 Hard state3/4 Hard stateHard state<585585-725655-795725-860>8603.Strip tensile strength in line with the provisions of Table 3Status code StateTensile strength,N/mm2R 1/4I 1/2I 3/4I I Soft state 1/4 Hard state 1/2 Hard state 3/4 Hard state Hard state <570 520-630 590-700 600-770 >700 4.Alloy average linear expansion coefficient in line with the Table 4 Alloy Grades Specimen heat treatment system The average linear expansion coefficient, 10-6/ oC 20-300 oC 20-400 oC 20-450 oC kovar In hydrogen atmosphere heated to 900 ± 20 oC, insulation 1h, and then heated to 1100 ± 20 oC, insulation 15min, to not more than 5 oC / min rate of cooling to below 200 oC released ----- 4.6-5.2 5.1-5.5* 5.Alloy typical expansion coefficient Alloy Grades The average linear expansion coefficient a,10-6/ oC 20-200 oC 20-300 oC 20-400 oC 20-450 oC 20-500 oC 20-600 oC 20-700 oC 20-800 oC kovar 5.9 5.3 5.1 5.3 6.2 7.8 9.2 10.2