Hadfield Manganese Steel Hadfield steel also known as Hadfield steel or Hadfield austenitic manganese steel was invented by Sir Robert Hadfield in 1882. The first British patent for this steel, number 200 was granted for this steel in 1883. The first US patents, numbers 303150 and 303151, were granted in 1884. Fig 1 shows the …
Read MoreRolling Mill Stands The purpose of rolling is to convert material of large cross-sections of long work pieces into smaller sections of various shapes. This deformation is accomplished by applying compressive forces through a set of two rolls which rotate in opposite directions, the space between the rolls being less than the thickness of the …
Read MoreMaterial discontinuities and their Types The aim of an inspection is to determine if the material being inspected is to be accepted or rejected. During the inspection, the inspector looks for the discontinuities in the material and identifies their nature and size. Then, those discontinuities are evaluated according to an acceptance criterion to determine whether …
Read MoreWelding and Joining Processes Welding and joining processes are necessary for various engineering activities and in the development of virtually every manufactured product. However, these processes frequently appear to consume greater fractions of the product cost and to create more of the production difficulties than normally expected. There are a number of reasons for this. …
Read MoreUltra-high Strength Steels Structural steels with very high strength levels are normally called ultra-high strength steels (UHSS). The designation ultra-high strength is arbitrary since no universally accepted strength level for the term has been established. Also, as structural steels with greater and greater strength have been developed, the strength range for which the term is …
Read MoreCoated Steel Sheet Steel sheet is frequently coated in coil form before fabrication either at the steel plants or by the specialists coating units. This coated sheet is ready for fabrication and use without further surface coating. Coated products yield lower production costs, improved product quality, shorter processing cycles, elimination of production hazards, conservation of …
Read MoreBearing Steels The Oxford English Dictionary defines a bearing ‘as a part of a machine that allows one part to rotate or move in contact with another part with as little friction as possible’. Additional functions include the transmission of loads and enabling the accurate location of the components. A bearing is required to sustain …
Read MoreSteel Castings Steel castings are produced by pouring liquid steel of the desired composition into a mould of the desired configuration and allowing the steel to solidify. The mould material can be silica, zircon, or chromite sand, olivine sand, graphite, metal, or ceramic. The choice of mould material depends on the size, intricacy, dimensional accuracy …
Read MoreCarbon and Low Alloy steel Plates Steel plate is a flat-rolled steel product which is more than 200 mm wide and more than 6.0 mm thick or more than 1,220 mm wide and 5 mm thick. The steel plate rolling mills normally have a working-roll width ranging from 2,000 mm to 5,600 mm. Hence the …
Read MoreAbrasion Resistance of Steels and Abrasion Resistant Steels Abrasion is a degradation process of the working surfaces of stressed parts, which gradually impairs the parameters of the machine parts and the equipment. This abrasive degradation process is caused by the interaction of hard, usually mineral particles with the working surface of the part. In marginal …
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