Page "Cannon" Paragraph 7

Field artillery cannon in Europe and the Americas were initially made most often of bronze, though later forms were constructed of cast iron and eventually steel.

Bronze has several characteristics that made it preferable as a construction material: although it is relatively expensive, does not always alloy well, and can result in a final product that is " spongy about the bore ", bronze is more flexible than iron and therefore less prone to bursting when exposed to high pressure ; cast iron cannon are less expensive and more durable generally than bronze and withstand being fired more times without deteriorating.

However, cast iron cannon have a tendency to burst without having shown any previous weakness or wear, and this makes them more dangerous to operate.