Heavy Press Program


The Heavy Press Program was a Cold War-era program of the United States Air Force to build the largest forging presses and extrusion presses in the world. These machines greatly enhanced the US defense industry's capacity to forge large complex components out of light alloys, such as magnesium and aluminium. The program began in 1950 and concluded in 1957 after construction of four forging presses and six extruders, at an overall cost of $279 million. Eight of them are still in operation today, manufacturing structural parts for military and commercial aircraft. They still hold the records for size in North America, though they have since been surpassed by presses in Japan, France, Russia and China.
The program produced ten machines, listed below.

Background

The Heavy Press Program was motivated by experiences from World War II. Germany held the largest heavy die forging presses during the war, and translated this advantage into high performance jet fighters. The Soviet Union captured the largest German press to survive the war, with a capacity of 33,000 ton, and were suspected to have seized the designs for an even larger 55,000 ton press. The next two largest units were captured by the United States and brought across the Atlantic, but they were half the size at 16,500 ton. As Cold War fears developed, American strategists worried that this would give the Soviet Air Force a crucial advantage and designed the Heavy Press Program to help win the arms race.
Seventeen presses were originally planned with an expected cost of $389 million, but the project was scaled back to 10 presses in 1953.
Air Force Lieutenant General K. B. Wolfe was the primary advocate for the Heavy Press Program. Alexander Zeitlin was another prominent figure of the program.
before and after pressing by the Alcoa 50,000 ton press

Presses

Capacity
Type of pressBuilt byOperated byLocationBegan Operation
13,200extrusionAlcoaLafayette, Indiana1953
50,000forgingMesta MachineryAlcoaAir Force Plant 47, 1600 Harvard Avenue, Cleveland, OhioMay 5, 1955
35,000forgingUnited EngineeringAlcoaAir Force Plant 47, 1600 Harvard Avenue, Cleveland, Ohio1955
8,000extrusionLoewy HydropressKaiser AluminumHalethorpe, Maryland
8,000extrusionLoewy HydropressKaiser AluminumHalethorpe, Maryland
8,000extrusionLoewy HydropressHarvey Machine Co.Torrance, California
12,000extrusionLombard CorporationHarvey Machine Co.Torrance, CaliforniaAugust 1957
50,000forgingLoewy HydropressWyman-GordonAir Force Plant 63, Grafton, MassachusettsOctober 1955
35,000forgingLoewy HydropressWyman-GordonAir Force Plant 63, Grafton, MassachusettsFebruary 1955
12,000extrusionLoewy HydropressCurtiss-WrightBuffalo, New York

Landmark designation

The American Society of Mechanical Engineers designated the 50,000-ton Alcoa and Wyman-Gordon presses as Historic Mechanical Engineering Landmarks. The Alcoa press weighs 8,000 tons and is tall. The die table is, and the maximum stroke is.