The thermocouples were supposed to be in Inconel 600. They were in Alloy 840. That is the third time that the manufacturer make mistake in my order. The first time they send thermocouples in SS320 instead of Inconel 600. The second time, they send thermocouples with one set of wires instead of 2 sets of 2 wires as ordered. This time, the alloy is wrong.