Datasheet for Steel Grades Carbon Steel ASTM A36 ASTM A36 Standard Number:ITEM Standard Number Descriptions ASTM A36 Chemical composition(mass fraction)(wt.%) Chemical Min.(%) Max.(%) C Si Mn P S Cr Ni Mo V Ta W N Cu Co Pb B Nb Al Ti Other ASTM A36, ASTM A36 Steel Plate - A36 Carbon Steel Plate Leeco A36 steel plate is a popular steel plate grade used for a variety of structural applications, including buildings. Available for heavy steel plate applications in up to 18 thickness. May have multiple specs certified on Mill Test Report, but guaranteed to be certified to meet ASTM A36.