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The Krupp steelworks, or Krupp foundry, or Krupp cast steel factory (German: Krupp-Gussstahlfabrik [Guss+stahl+fabrik]) in Essen is a historic industrial site of the Ruhr area of North Rhine-Westphalia in western Germany that was known as the "weapons forge of the German Reich" (Waffenschmiede des Deutschen Reiches).
By the 1880s, Krupp had developed an 88mm naval gun and adopted 75mm as the caliber for the army's field and mountain guns. In 1897, when the French 75mm quick-firing gun appeared, Krupp produced the similar 77mm, which was used in World War I. Krupp mountain guns were also used during the Mexican Revolution [10] and the Spanish Civil War.
Krupp AG and Friedrich Krupp GmbH) trading as Krupp, was the largest company in Europe at the beginning of the 20th century as well as Germany's premier weapons manufacturer during both world wars. It produced battleships , U-boats , tanks , howitzers , guns , utilities, and hundreds of other commodities.
The data and calculations from the 7 August 1879 test showed that the 24 cm MRK L/25.5 was exceptionally powerful, but exceptional results generally require more proof. Krupp had therefore ordered armor plates that the gun's steel projectile should be able to overcome with 11% of its power remaining after passing through. [30]
Design drawing by Krupp. The development of the 40 cm MRK L/25 drew international attention even before it was tested. At the time, the British Royal Arsenal at Woolwich, and the Elswick Ordnance Company where building experimental 'Woolwich' and 'Armstrong' guns of about 81 and 100 tons for HMS Inflexible and the Duilio-class ironclads.
Krupp then designed the so-called Construction C/80. This was an overall specification for the characteristics of guns of 15 cm caliber and higher and with lengths from L/25 to L/35. [ 4 ] The next gun that was tested was the prototype gun 15 cm (6 inch) MRK L/30, which had the odd caliber of 6 British inches.
In March 1882, the 30.5 cm MRK L/35 gun barrel was tested at the artillery proving grounds in Meppen. [19] Indeed, the test of this recently completed gun was the main reason to stage a big event for artillery men from all over the world. [20] As produced, the gun barrel weighed 49,700 kg including the breech block.
In January 1867 the Prussian Navy ordered Krupp to design a 9 inch (96-pdr) gun barrel. [13] This was the 24 cm K L/20, which had a caliber of 235.4 mm. From this measurement we know that Krupp designed a gun with a caliber of 9 Prussian inch or Zöll, which explains why Krupp and others liked to refer to the 9 inch gun.