... ,MT X1020 ASTM A519 specification covers for several grades of carbon and alloy steel mechanical tubing, ... :1-30mmLength:14000mm maxChemical Requirements of Low-Carbon Steels Grade DesignationChemical Composition Limits, %CarbonAManganeseBPhosphorusB, ... tolerances given in Table 5Chemical Requirements of Other Carbon Steels Grade DesignationChemical Composition Limits, %ACarbonManganesePhosphorus, ...