Special Specifications for Steel Wire to Be Used in Connection With Ordnance Pamphlet No. 445
Special Specifications for Steel Wire to Be Used in Connection With Ordnance Pamphlet No. 445
United States Army Ordnance Dept
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The following physical qualities are required, viz: (a) All wire must have sufficient ductility to enable it to be wrapped without rupture about a cylinder of di- ameter equal to the diagonal of its cross section. (h) The wire one-eighth inch on a side must have an ultimate strength of at least 180,000 pounds per square inch. The elongation due to an increase in stress from 20,000 to 100,000 pounds per square inch must not ex- ceed 0.35 of 1 per cent of the original gauge length. (c) The wire o...ne-tenth inch on a side must have an ultimate strength of at least 200,000 pounds per square inch. The elongation due to an increase in stress from 20,000 to 140,000 pounds per square inch must not exceed 0.50 of 1 per cent of the original gauge length. (d) The right is reserved to reject wire which may have very high qualities with lack of uniformity, which is too hard and stiff to pass through the winding machines and wind satisfactorily on the gun, which breaks in winding, or for other reasons is unsuitable for use in gun manufacture.
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