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| >> GLOSSARY OF TERMS |
| U |
| ULTIMATE STRENGTH (See Tensile Strength.) |
| UPSETTING (1) A metal working operation similar to forging. (2) The process of axial flow under axial compression of metal, as in forming heads on rivets by flattening the end of wire. |
| UTILITY SHEET ALUMINUM Mill finish coiled or flat sheet of unspecified composition and properties produced in specific standard sizes and suitable for general building trade usage. |
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