MIL-H-47143, MILITARY SPECIFICATION, HEAT TREATING, TYPE D6AC ALLOY STEEL, PROCESSES FOR (7 JUN 1974)

MIL-H-47143, MILITARY SPECIFICATION, HEAT TREATING, TYPE D6AC ALLOY STEEL, PROCESSES FOR (7 JUN 1974)., This specification covers three methods of heat treating parts fabricated from D6AC alloy steel conforming to MIL-S-47036 to an ultimate strength level of 200,000 to 230,000 pounds per square inch (psi).