Specificationsthe advanced casting facility, we could basically eliminate the porosity, blisters and other casting defects. 

Heat treatment fixture: such as trays and grids, baskets, chain guides, fans, cast link belts
Application: for heat treatment furnaces in commercial heat treating industry
Process: precision casting/silica sol investment cast method
Material: high nickel and high chrome heat resistant alloy
Standard: ASTM (like A297 A208), DIN, BS
Quality control:
Chemical analysis by spectrometer
Measurement inspection
Mechanical properties testing, yield point, tensile strength, elongation
Non destructive inspection (NDT): ultrasonic, X-ray, dye penetrant test, magnetic particle inspection, eddy current testing
1B material certificates