The Difference Between Malleable and Cast Iron Door Hardware.

Written by Ali Arnold

There is often confusion aboutrepparttar difference between malleable iron and cast iron hardware. There are many cheaper cast iron products for sale now, many of which are identical in size, shape and general appearance to quality door and window hardware. The difference is that cast iron will break.

Kirkpatrick Ltd for Walsall inrepparttar 142972 UK, has been synonymous withrepparttar 142973 production of high quality malleable iron builders's ironmongery for over 140 years. Producing an extensive range of Black Antique and Plain Gothic styles.

Kirkpatrick's malleable iron products are hand-made inrepparttar 142974 their foundry in Walsall using green sand casting process. At this stagerepparttar 142975 castings are hard and brittle and cannot be hammered, so they are subjected to a heat treatment known as 'annealing'. In this processrepparttar 142976 castings are surrounded by an inert haematite ore within iron drums and loaded into ovens of six to eight tons capacity. The ovens take about two days to reachrepparttar 142977 annealing temperatue of 980 C. The castings are then soaked at this temperature for around 80 hours, after which they are allowed to cool naturally. During this processrepparttar 142978 carbon structure ofrepparttar 142979 iron is changed. The resulting castings are no longer hard and brittle, but soft and malleable.

The History of Super Glue

Written by T.Going

The History of Super Glue

Iím sure many of you have already wondered where super glue came from. Inrepparttar past there have been urban legends that described super glue as an Ďaccidental solutioní to battle wounds during World War II, butrepparttar 142885 actual evolution is slightly different.

In 1942repparttar 142886 original cyanoacrylates (chemical name) were discovered while searching for materials that could make clear plastic gun sights forrepparttar 142887 war. While searching for these materials, scientists came upon a formulation that stuck to everything it came into contact with. These cyanoacrylates were rapidly rejected by American researchers forrepparttar 142888 sole reason that they stuck to everything they came in contact with. It wasnít until 9 years later that these cyanoacrylates were rediscovered by researchers from Eastman Kodak. Fred Joyner and Harry Coover recognizedrepparttar 142889 true potential for these cyanoacrylates and it was first sold as a commercial product in 1958. Since then Super Glue has evolved into several other great products, and continues to grow even to this day.

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