WHAT IS RHEINZINK®? Since 1993, RHEINZINK® has been used in North American on college and corporate campuses, libraries, cultural centers, and residential projects. RHEINZINK® is recognized as a low- environmental impact metal of choice that is both beautiful and cost-effective. Available in two titanium-zinc alloys: RHEINZINK® Pre-weathered blue-gray (PWBG) and Pre-weathered graphite-gray (PWGG). Also available in Bright Rolled (BR); mill finish: blue-gray alloy with no Pre-weathering treatment. Composition of RHEINZINK® Zinc 99.835% Titanium 0.07 - .12% Copper 0.1 - .18% (PWBG) Copper 0.08 - 1.0% (PWGG) Copper ■ Forms a solid solution with zinc ■ Improves malleability ■ Is responsible for the natural Blue-Gray and Graphite-Gray colors Titanium ■ Improves the tensile strength and hardness of the material and increases creep resistance ■ Increases the re-crystallization temperature by about 68° F (20° C) to about 572° F (300° C). Fig. 1 gutters (40 years). This engineered zinc-alloy also helps designers provide a nat-ural gray color compliment or contrast to brick, concrete/CMU, slate, stone, or wood while also achieving a long servͭice life. RHEINZINK® is a monolithic metal that is low-maintenance, malleable, and has no color coating. For almost 300 years, zinc has been used by European designers and sheet-metal craftsman to create structures that endure. RHEINZINK® is the world's leading brand of architectural-zinc for building applications. Generically known as "titanium-zinc", RHEINZINK® is a natu-ral-weathering metal that forms a blue-gray patina after repeated exposure to moisture and air. Combining 99% super high-grade zinc with approxi-mately 1% titanium and copper, the RHEINZINK® alloy can help provide long-term solutions for roofs (80 + years), wall cladding (200+ years), and RHEINZINK Coils and Sheets come in Bright Rolled, Pre-weathered Blue-Gray and Pre-weathered Graphite-Gray Gutter Systems stocked in Pre-weathered Blue-Gray, Pre-weathered Graphite-Gray and Bright Rolled by special order. RHEINZINK

WHAT IS RHEINZINK®? DIN Standards and Mechanical Properties RHEINZINK® is manufacture! to exceed the requirements of Euro-Norm Standard DIN EN 988 (formerly DIN 17770), which prescribes certain minimum material properties for titanium zinc. RHEINZINK® is constantly subject-ed to quality control monitoring accord-ing to DIN EN ISO 9001 requirements, and additionally by an external inspec魭tion through an accredited, independ-ent institute (TUV Rheinland), according to the "Quality Zinc" criteria. The following chart outlines the mechanical and physical properties of RHEINZINK®: Property Metric...

ENVIRONMENTAL BENEFITS OF RHEINZINK Lower Embodied Energy Used RHEINZINK®-Titanium Zinc has a pri-mary energy content of 3610 kW hours per ton. In comparison with other metals this value is extremely low, yet it includes all production steps necessary in manufacturing. Zinc has a low melt-ing point resulting in lower energy requirements at the smelting stage of production. Fig. 2 Physical Elements Zinc is present throughout the natural environment; in the earth, air and water. Zinc is essential to all life, a fundamen-tal part of the metabolic processes of plants, animals and humans. Longevity...

WEATHERING CHARACTERISTICS Patina Process Since RHEINZINK® blue-gray and graphite-gray alloys are natural metals, consisting mostly of zinc; it will weather according to its environment. When exposed to wetting and drying cycles, the surface will slowly develop a natural patina comprised of zinc carbonate. The patina is a crusty outer layer, which pro-tects the underlying alloy and ensures its long life. The resulting color is a soft, blue-gray or graphite-gray, depending on the alloy. In inland locations, the RHEINZINK® patina forms through a process whereby the zinc undergoes a two-step chemical...

WEATHERING CHARACTERISTICS Fig. 3 after one hundred years of service. Both projects were renewed with RHEINZINK® material. Proper detailing, fabrication and work-manship contribute to the longevity of zinc as a building envelope material. The durability of zinc as roofing, roof drainage, and cladding material is inherent in the zinc itself and is attrib-uted to the ability of zinc to form a pro-tective patina which prevents the zinc from oxidizing. The formation of a uniform patina may occur within 6 months to 5 years depending on the aggressiveness of the environment. The composition of the...

WEATHERING CHARACTERISTICS Properties of RHEINZINK® N Pre-weatheredpro ' ■ Provides temporary rsistance against corrosion ■ Temporary anti-fingerprint properties ■ Helps with fabrication - "Oil-Free Roll Forming" ■ Solders Easily ■ Recyclable The duration of the corrosion protection depends on the conditions at the site. On vertical surfaces that are partly or completely protected from rain, the coating will last for a long time, but will erode more quickly when fully exposed to the weather. RHEINZINK® xPre-weatheredpro' is not resistant to acids and strong alkaline solutions and offers only...

INFLUENCES FROM OTHER BUILDING MATERIALS RHEINZINK® is compatible with most common construction materials. The following outlines precautions related to specific materials; however, with proper detailing, incompatible materials may be used. Sealants Most sealants used in building envelopes are compatible with RHEINZINK®. These include all sealants that are neutral or alkaline cure (pH levels between 5.5 and 11.5). Acidic cure sealants must not come in contact with RHEINZINK® as they may cause corrosion. Metals Corrosion caused by electrochemical reactions can occur when two metals of differing...

FABRICATION All standard cutting, routing and folding fracture while folding. At material tem- ^- tools along with methods used for non- peratures below this threshold, preheat (^(^^ interior radius >1.5 x d d ferrous metals will work with the area to be folded with a hot air gun RHEINZINK® except in cold tempera- or heat lamps. Do not attempt to bend ׮ tures. or fold RHEINZINK® in ambient temper- Fig. A: Minimum Interior Bending Radius for Metal Thickness = d Cold Weather Bending atures below14° F (-10° C ). Zinc becomes brittle at material temperatures below 50° F (10° C). The lower the temperature...