Kovar rod materials:1.2mm-200mm Looking forward to cooperating with you! Kovar RodDanyang City KaiXin Alloy Material Co., Ltd.Kovar alloy,ASTM F15,Nilo K,UNS K94610,FeNi29Co17 Chinese 4J29,YB/T5231-2005,FeNi29Co18,Lockinvar,Alloy 12B,Sealing Alloy. Note:A Nickel-Iron-Cobalt, controlled expansion alloy containing 29% Nickel. It's coefficient of expansion (which decreases with rising temperature to ...