... K93600,UNS K93660,alloy 36,ASTM F1684.Nilo 36,etc. invar rod diameter: from 1mm-100mminvar 36 is also known as USN ... K93600,UNS K93660,alloy 36,ASTM F1684.Nilo 36,etc.Invar 36 is a Nickel-Iron, low expansion alloy containing 36 ... /212°F) ............. 0.0006per °C (21/100°C) ............. 0.0011 invar rod