Engineering Materials
Engineers have to know the best and most economical to use. Engineers must also understand the properties of these materials and how they can be worked. There are two kinds of materials used in engineering metals and non metals. The former contain iron and the latter do not contain iron. Cast iron and steel, which are both alloys, or mixtures of iron and carbon, are the two most important ferrous metals. Steel contains a smaller proportion of carbon than cast iron contains. Certain elements can improve the properties of steel and are therefore added to it. For example, chromium may be included to resist corrosion and tungsten to increase hardness. Alumunium, copper, and brass, are common non ferrous metals.
Comprehension
Study the following statements carefully.
1. Non metals are used by engineers.
2. Cast iron contains more carbon than steel.
3. Chromium imoroves the properties of steel.
4. Copper contains iron.
5. Bronze is an alloy.
Plastics and ceramics are non metals, however, plastics may be mahined like metals. Plastics are classified into two types thermoplastics and thermosets. Thermoplastics can be shaped and reshaped by heat and pressure but thermosets can not be reshaped because they undergo chemical changes as they harden. Ceramics are often employed by engineers when materials which can withstand high temperatures are needed.
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Engineers have to know the best and most economical to use. Engineers must also understand the properties of these materials and how they can be worked. There are two kinds of materials used in engineering metals and non metals. The former contain iron and the latter do not contain iron. Cast iron and steel, which are both alloys, or mixtures of iron and carbon, are the two most important ferrous metals. Steel contains a smaller proportion of carbon than cast iron contains. Certain elements can improve the properties of steel and are therefore added to it. For example, chromium may be included to resist corrosion and tungsten to increase hardness. Alumunium, copper, and brass, are common non ferrous metals.
Comprehension
Study the following statements carefully.
1. Non metals are used by engineers.
2. Cast iron contains more carbon than steel.
3. Chromium imoroves the properties of steel.
4. Copper contains iron.
5. Bronze is an alloy.
Plastics and ceramics are non metals, however, plastics may be mahined like metals. Plastics are classified into two types thermoplastics and thermosets. Thermoplastics can be shaped and reshaped by heat and pressure but thermosets can not be reshaped because they undergo chemical changes as they harden. Ceramics are often employed by engineers when materials which can withstand high temperatures are needed.
bantuannya tolong artikan bahasa indonesia dong.
thank you
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pemahaman
Pelajari laporan berikut dengan seksama.
1 Non logam yang digunakan oleh para insinyur. 2 besi cor mengandung lebih banyak karbon dari baja. 3 Chromium imoroves sifat-sifat baja. 4. Tembaga mengandung zat besi. 5. Perunggu adalah paduan.
Plastik dan keramik non logam, bagaimanapun, plastik dapat mahined seperti logam. Plastik diklasifikasikan menjadi dua jenis termoplastik dan termoset. Termoplastik dapat dibentuk dan dibentuk kembali oleh panas dan tekanan tapi termoset tidak bisa dibentuk kembali karena mereka mengalami perubahan kimia karena mereka mengeras. Keramik sering digunakan oleh para insinyur ketika bahan yang dapat menahan suhu tinggi diperlukan.