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ANSWER: ASTM A1011 UHSS steel is the hot rolled flat steel sheet or steel strip carbon Ultra-high strength quality steel. A1011 UHSS have two grades, they are :A1011 UHSS Grade 90, A1011 UHSS Grade 620, A1011 UHSS Grade 100, A1011 UHSS Grade 690. Both grades have two type: A1011 UHSS Grade 90(620) Type 1, A1011 UHSS Grade 90(620) Type 2, A1011 UHSS Grade 100(690) type 1, A1011 UHSS Grade 100(690) type 2
A1011 UHSS pickled steel is under the American standard ASTM A1011/A1011M. “HS” means high strength, “U” means Ultra, “ HS” means high strength, “S” means steel.
