... from Korea, and also imported Korean stamping equipments. For better quality test of the welded bellows, it also ... requirements.Parameter Reference: Inner vacuumVacuumOuter vacuumOuter vacuum, atmospheric pressureTemperatureNormal temperature -250/450°C(316L), -250/800°C(AM350),The highest vacuum ... L/SMaterialVacuum SUS 316L,SUS 304,AM350,Hastelloy alloy C Haynes alloy 242,Inconel 625 and 718 alloy, ...