STEEL AND GLASS WORK

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STEEL AND GLASS WORK

Toughened glass is physically and thermally stronger than regular glass. The greater contraction of the inner layer during manufacturing induces compressive stresses in the surface of the glass balanced by tensile stresses in the body of the glass. For glass to be considered toughened, this compressive stress on the surface of the glass should be a minimum of 69 mega pascals (10,000 psi). For it to be considered safety glass, the surface compressive stress should exceed 100 mega pascals (15,000 psi). The greater the surface stress, the smaller the glass particles will be when broken. It is this compressive stress that gives the toughened glass increased strength. This is because any surface flaws tend to be pressed closed by the retained compressive forces, while the core layer remains relatively free of the defects which could cause a crack to begin. Any cutting or grinding must be done prior to tempering. Cutting, grinding, and sharp impacts after tempering will cause the glass to fracture. The strain pattern resulting from tempering can be observed with polarized light or by using a pair of polarizing sun glasses.

Steels are alloys of iron and other elements, primarily carbon, widely used in construction and other applications because of their high tensile strengths and low costs. Carbon, other elements, and inclusions within iron act as hardening agents that prevent the movement ofdislocations that otherwise occur in the crystal lattices of iron atoms.

The carbon in typical steel alloys may contribute up to 2.1% of its weight. Varying the amount of alloying elements, their formation in the steel either as solute elements, or as precipitated phases, retards the movement of those dislocations that make iron comparatively ductile and weak, and thus controls qualities such as the hardness, ductility, and tensile strength of the resulting steel. Steel's strength compared to pure iron is only possible at the expense of ductility, of which iron has an excess.

Although steel had been produced in bloomery furnaces for thousands of years, steel's use expanded extensively after more efficient production methods were devised in the 17th century for blister steel and then crucible steel. With the invention of the Bessemer processin the mid-19th century, a new era of mass-produced steel began. This was followed by Siemens-Martin process and then Gilchrist-Thomas process that refined the quality of steel. With their introductions, mild steel replaced wrought iron.

Further refinements in the process, such as basic oxygen steelmaking (BOS), largely replaced earlier methods by further lowering the cost of production and increasing the quality of the metal. Today, steel is one of the most common materials in the world, with more than 1.3 billion tons produced annually. It is a major component in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons. Modern steel is generally identified by various grades defined by assorted standards organizations.

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OUR COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

The final design ensures a beautiful, comfortable,and most importantly a functional space for our clients

COMPLETED PROJECTS

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