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D6ac Steel – Composition | Properties | Applications

D6AC steel is vacuum melted, medium carbon, low alloyed, and ultra-high-strength steel. This grade is used for high strength applications like aircraft structure with strength levels up to 280,000 psi. With proper tempering, yield strength and hardness of this grade can reach up to 1750 MPa, and 53HRC respectively. D6AC Steel Composition D6AC Steel Properties Physical Properties Mechanical Properties We used the Rockwell Hardness test for the measurement of the Hardness of D6AC steel.