post date: dec 02,2021 expiry date: dec 02,2022 detailed description: code color chemical composition heat resistanceunb-601 black fe-cr 1300 unb-605 mn-pink mn-al 1300 unb-608 orange ti-sb-cr 1250 unb-612 green cr-al 1300 unb-618 blue co-al 1300
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