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Islamic Golden Age brass astrolabe Brass lectern with an eagle. Attributed to Aert van Tricht, Limburg (Netherlands), c. 1500.. Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, [1] but copper typically has the larger proportion, generally 66% copper and 34% zinc.
Gunmetal ingot is a related alloy in which the zinc is replaced by 2% lead; this makes the alloy easier to cast but it has less strength. [2]Modified gunmetal contains lead in addition to the zinc; it is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc.
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A mill test report (MTR) and often also called a certified mill test report, certified material test report, mill test certificate (MTC), inspection certificate, certificate of test, or a host of other names, is a quality assurance document used in the metals industry that certifies a material's chemical and physical properties and states a product made of metal (steel, aluminum, brass or ...
It consists of a prefix letter and five digits designating a material composition. For example, a prefix of S indicates stainless steel alloys, C indicates copper, brass, or bronze alloys, T indicates tool steels, and so on. The first 3 digits often match older 3-digit numbering systems, while the last 2 digits indicate more modern variations.
The label of Australian Brasso lists "Liquid Hydrocarbons 630g/L; Ammonia 7g/L", whereas the material safety data sheet for Brasso in North America lists: isopropyl alcohol 3–5%, ammonia 5–10%, silica powder 15–20% and oxalic acid 0–3% as the ingredients. [4] The Australian version also contains silica (silicon dioxide) for abrasives. [5]
Elastic properties describe the reversible deformation (elastic response) of a material to an applied stress. They are a subset of the material properties that provide a quantitative description of the characteristics of a material, like its strength. Material properties are most often characterized by a set of numerical parameters called moduli.
All substances must be declared in the material data sheet (MDS) of the IMDS to a resolution of 1 gram or better – not just declarable and prohibited substances (e.g. Cr VI / Hg / Pb / Cd). Substances and materials of products must be known in detail so that it may be delivered by the OEMs to dismantler companies in order to achieve the goals ...