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Three are known to have survived. One surviving 3-inch wrought iron Wiard rifle exists, but it has an unusual band across the trunnions. [8] The Confederate States manufactured an estimated 84 cast iron 3-inch rifles, at least 61 of them at the Tredegar Iron Works; [9] several appear to be imitations of the U.S. Ordnance Department design. [10]
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Pure Iron ('Steel' with 0% Carbon) starts to melt at 1,492 °C (2,718 °F), and is completely liquid upon reaching 1,539 °C (2,802 °F). Steel with 2.1% Carbon by weight begins melting at 1,130 °C (2,070 °F), and is completely molten upon reaching 1,315 °C (2,399 °F).
A36 steel has a Poisson's ratio of 0.26 and a shear modulus of 11,500 ksi (79.3 GPa). [ 7 ] A36 steel in plates, bars, and shapes with a thickness of less than 8 inches (203 millimeters) has a minimum yield strength of 36 ksi (250 MPa ) and ultimate tensile strength of 58–80 ksi (400–550 MPa).
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4.5-inch siege rifle at Chatham Manor, Fredericksburg and Spotsylvania National Military Park. The 4.5-inch siege rifle looks like a larger version of the 3-inch ordnance rifle and it is often called a 4.5-inch ordnance rifle. However, the 4.5-inch siege rifle was of conventional cast iron construction and did not use the welded wrought iron ...