ATM A514 quenched and tempered (Q&T) steel grades

ATM A514 steel grades (A, B, H, E, F & Q) are quenched and tempered (Q&T) steel. In applications where wear-resistance is crucial, project engineers may opt to use quenched and tempered steel materials. Q&T steel is heat-treated, a process that intensely heats and cools a material to alter its physical properties, to enable the material to withstand severe impact and abrasion.

ATM A514 Q&T steel has a chemical composition that is governed by ASTM code, shown in the chart below. Quenching and tempering this grade enhances the presence of chemicals, such as silicon and chromium, that strengthen and increase hardness.

Chemical Compositions of ATM A514 Q&T Steel Plate Grades

For example, ASTM A514 quenched and tempered steel has a much higher yield point and tensile strength than ASTM A572 high strength low alloy steel. Yield point and tensile strength measure the point at which a steel material will deform and the point at which a steel material will break, respectively, and are core indicators of material strength.
Mechanical Properties of ASTM A514 Plate and A572 Grade 50

As a result of its chemical composition and being heat-treated, A514 quenched and tempered steel has greater strength and toughness compared to non-heat-treated, mild carbon steel grades.

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