WE'VE BEEN USING 6262-T9 ON OUR TUBULAR CASE FOR OUR PRODUCT & IT TURNS OUT THAT IT CONTAINS LEAD (Pb). OUR VENDOR SUGGESTED 6020-T9 BUT STILL IT CONTAINS CHROMIUM THAT IS MORE THAN THE ALLOWABLE CONTENT OF 0.1%. MY QUESTION IS, DOES THE CHROMIUM CONTENT IN 6020-T9 A "HEXAVALENT OR NON-HEXAVALENT CHROMIUM"?