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Results 1561 - 1570 of 1574 for Water treatment
  • Article - 16 Aug 2003
    Sapphires are well known gem stones. The stages in their processing, such as grading, heat treatment and marketing are discussed. Characteristics and colours are also mentioned.
  • Article - 5 Feb 2003
    Ruthenium is a member of the platinum group of metals. It has limited uses in the pure state but is often alloyed with precious metals and titanium. Properties such as chemical resistance, electrical,...
  • Article - 8 Jan 2002
    Stainless steels can be fabricated using most conventional techniques, although some different processing parameters may be required compared to plain carbon steels. These are investigated for...
  • Article - 7 Jan 2002
    One of the barriers to wide spread acceptance of solar energy is the cost of photovoltaic systems. This article looks at ways these costs can be reduced such as capital costs, deposition rates, other...
  • Article - 7 Nov 2001
    Suitable heat treatment can see this grade attain the highest hardness, strength and wear resistance of any stainless steel. This is due to the high carbon content. The composition is optimised for...
  • Article - 26 Oct 2001
    Grade 430 is a non-hardenable grade that combines good corrosion resistance, formability and useful mechanical properties. It is resistant to nitric acid making it useful in the chemical industry, but...
  • Article - 23 Oct 2001
    420 is a higher carbon version of grade 410. When fully hardened it is the hardest of this family of stainless steels. Hardness is optimised at the expense of other properties. Typical applications...
  • Article - 23 Oct 2001
    416 is the most machinable grade of stainless steel. It is a low cost grade and can be used unhardened, hardened and highly tempered states. Hardness is optimised at the expense of other properties...
  • Article - 23 Oct 2001
    410 is the basic martensitic grade stainless steel. They are optimised for high hardness, although other properties can be compromised. Corrosion resistance is aided by hardening. Typical applicatiosn...
  • Article - 23 Oct 2001
    321 is similar to 304, but uses titanium as a stabiliser. They differ in that they are resistant to intergranular corrosion after heating to temperatures in the carbide precipitation range....