RENNER GS is a metallurgically bonded metallic composite strip produced by roll bonding. The roll-bonding process is based on solid-state welding technology, requiring no adhesive or brazing alloys to achieve a clean, permanent, bond.
The clad material has excellent bond integrity due to the nature of the metallurgical bond that develops between the copper and stainless steel layers.
Recommended Applications
• (standing seam, batten seam, flat seam)
Weathers to the intermediate brown and then to the same desirable green patina as solid copper. Lends itself to easy fabrication of standing seam, batten seam, and Bermuda seam roofing styles. Has the strength of stainless steel
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Everything you admire in copper plus everything you expect in stainless steel. Can be cut to any desired length because it is available in coil form. Desired effect, ease of handling , and economy can all be balanced for optimum results.
• (gutters, downspouts)
Will accept severe forming. Stainless steel core provides greater resistance to erosion problems in the bends and elbows of gutters and downspouts.
• (base, counter, cap, eave, valley, through wall)
Cuts, forms, and installs easily. Compatible with all types of mortar and mortar additives. Fully annealed copper clad stainless steel is strong and easy to use. The architect can carry the copper theme throughout the sheet metal work.
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Compatible with all custom and standard fascia designs.
Advantages
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Since the bond occurs at the atomic level, Copper Clad Stainless is as strong as the metals themselves. It has high resistance to corrosion and erosion and needs no protective coating when set in mortar or concrete.
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Since the core of the Copper Clad Stainless is stainless steel the material has a significantly higher strength than solid copper. Equivalent strength to solid copper can be achieved with a much thinner material by using Copper Clad Stainless.
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Copper Clad Stainless saves construction costs all the way down the line. Less weight means easier handling, less fatigue, more material installed in less time, and the material cost less expensive than solid copper.
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The lower thermal conductivity of the stainless steel core retains the heat of the joint thus permitting the use of smaller, cooler irons at higher speeds.
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Gutters, downspouts, cornices, as well as other intricate shapes are easily formed to bring beauty, quality, and durability to any installation.
Design Specifications
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Copper Clad Stainless is composed of a 20% thickness of copper metallurgically bonded at the atomic level to an 80% core of Type 430 stainless steel. It is fully annealed. The copper thickness was designed to offer more than 60 years of service in the most aggressive environments.
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Install in accordance with recognized construction sheet metal practices. It is readily cut, formed, soldered, welded, riveted, nailed, and otherwise worked by conventional sheet metal methods.
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Fully annealed Copper Clad Stainless forms like other soft construction metals. It can be bent flat on itself (180° bend – zero radius) at all standard gauges.
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Copper Clad Stainless is readily soft soldered using 50-50 or higher tin content solder. Mild fluxes for soldering copper are used. Smaller cooler irons can be used, resulting in faster soldering speeds.
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Conventional hand and power tools are used. For best results, cutting edges should be kept sharp and shears should be closely aligned.
• Mechanical Fasteners
All mechanical fasteners (nails, screws, bolts, rivets, etc.) used should be either copper, stainless steel, brass, or bronze.
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Final cleaning is not normally required except to remove solder flux residues, which form a premature green patina in affected areas. When desirable, final cleaning usually can be accomplished with a detergent and water. In the case of heavy deposits, a mild abrasive cleanser is recommended. No routine maintenance is required.
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Copper Clad Stainless is a superior product for any concealed, exposed, or special application where metal is indicated or required by the design. Simply indicate the location and configuration in the usual manner and identify the material as Copper Clad Stainless.
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Copper Clad Stainless is compatible with most building materials. However, contact with aluminum or carbon steel should be avoided as these metals may deteriorate when in contact with copper.
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