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U U.S.A. Standard United States of America Standard. (Now officially obsolete, although some still applicable.) U.S.A.S.I. Abbreviation for United States of America Standards Institute which has been superseded by American National Standards Institute, Inc. (A.N.S.I.). W Wall Thickness — At Any Point See Tube Measurement Terms. Wall Thickness — Average See Tube Measurement Terms. Water Stain See Stains. Water Tube See Tube, Copper Water Tube. Wavy This term is not recommended. Use instead the terms Wavy Edges and Ripple. Wavy Edges A wrinkled condition along the edges of the product, with a relatively flat center portion. See Figure 41.  Figure 41 – Exaggerated for IllustrationWelding Process of producing localized coalescence of metal by heating to suitable temperatures, with or without the application of pressure, and with or without the use of filler metal. The filler metal either has a melting point approximately the same as the base metals or has a melting point below that of the base metals, but above 800 F. Common welding processes are: Oxyacetylene Welding, Gas Shielded Arc Welding, Resistance Welding (Spot, Seam, Butt), Carbon Arc Welding, and Coated Metal Arc Welding Refer to American Welding Society Handbook for definitions and details of the various processes. Welded Tube See Tube. Welding Rod Filler metal, in wire or rod form, used in gas welding and brazing processes, and those arc-welding processes wherein the electrode does not furnish the filler metal. Some commonly used welding rods are: (1) Aluminum Bronze (Copper Alloy Nos. 618 and 622) — A copper-aluminum alloy having aluminum as the major alloying element with or without a small amount of iron. (2) Copper — Deoxidized copper containing minor additions of other elements. (3) Copper Nickel, 30% (Copper Alloy No. 715) — A copper-nickel alloy having nickel as the major alloying element (about 30%) with minor additions of other elements. (4) Low Fuming (Copper Alloy Nos. 680 and 681) — Manganese bronze type welding rod to which a small amount of silicon has been added to reduce the evolution of zinc oxide fumes in welding or brazing. (5) Manganese Bronze Welding Rod (Copper Alloy No. 675) A copper-zinc-manganese alloy in which manganese is present in small amounts. Usually also contains small quantities of iron and tin. A typical analysis would show about 57 percent copper, .7 percent tin, .7 percent iron, .10 percent manganese, and the remainder zinc. (6) Naval Brass (Copper Alloy No. 470) An alloy of approximately 60 percent copper, .7 percent tin and the remainder zinc. (7) Phosphor Bronze (Copper Alloy No. 518) — A copper-tin alloy containing residual phosphorus. (8) Silicon Bronze (Copper Alloy No. 656) — A copper-silicon alloy having silicon as the major alloying element up to 4 percent with or without lesser amounts of any of several elements such as zinc, tin, manganese, and iron. Welding Wire See Wire. Wind This term is not recommended. Use instead, the term Twist. Wire A solid section, other than strip, furnished in coils or on spools, reels or bucks. Flat wire including square, however, may also be furnished in straight lengths. See TOLERANCE Section, page 17; and pages 6, 7, 8, 9 and 10. (1) Metallic Coated Wire — Wire coated by hot dipping or electroplating with a different metal. (2) Brazing Wire — See Brazing Filler Metal. (3) Welding Wire — See Rod, Welding Rod. Wire Bar See Bar. Wrinkle This term is not recommended. Use instead, the term Wavy Edges. Y Yellow Brass (Copper Alloy Nos. 268 and 270) See Copper Alloy. Yield Strength As commonly applied to copper and copper alloys, yield strength is the stress which will produce an extension of .50 percent under load. It is known as Yield Strength .50 percent extension. See Test, Tension and ASTM E8. |
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