Difference Between Cast and Malleable Iron

Written by Ali Arnold

The owners of Architectural Ironmongery Ltd would like to explainrepparttar difference between malleable iron and cast iron ironmongery. The products we sell from Kirkpatrick are all malleable. We feel that we need to explain this due torepparttar 100018 cheaper cast iron products that are now are arriving inrepparttar 100019 country, many of which are identical in size, shape and general appearance. The difference is that cast iron will break.

The name Kirkpatrick Ltd has been synonymous withrepparttar 100020 production of high quality malleable iron builders's ironmongery for over 140 years. At Architectural Ironmongery Ltd we keep an extensive range of their Black Antique and Plain Gothic styles, all can be seen on our website at http://www.arciron.com and available by mail order.

Kirkpatrick's malleable iron products are hand-made inrepparttar 100021 their foundry in Walsall using greensand casting process. At this stagerepparttar 100022 castings are hard and brittle and cannot be hammered, so they are subjected to a heat treatment known as 'annealing'. In this processrepparttar 100023 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 100024 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 100025 carbon structure ofrepparttar 100026 iron is changed. The resulting castings are no longer hard and brittle, but soft and malleable.

Concrete Cutting: The Unknown Niche

Written by Robert Short / Affordable Concrete Cutting

What is Concrete Cutting? Concrete cutting is a process of controlled sawing, drilling and removal of concrete performed by skilled operators using special saws that use diamond impregnated blades. Unlikerepparttar old- fashioned dusty "jack hammer" method, modern concrete cutting leaves a smooth attractive finish and utilizes water so as not to create any dust or mess. There are many different kinds of concrete cutting butrepparttar 100017 most common are wall sawing, core drilling and slab or flat sawing.

Wall Sawing isrepparttar 100018 process of cutting openings such as doors or windows in concrete walls, usually no more than 12" thick but in some cases up to 24" thick. This is accomplished by using a saw that attaches to a track onrepparttar 100019 wall to be cut. This process utilizes an enormous 30" or even larger diameter diamond blade that can cut 12" or more of concrete all ofrepparttar 100020 way through from one side. This aspect of our business requiresrepparttar 100021 most skill and cannot easily be done by your average "do it yourselfer." As stated, wall sawing may entail cutting openings in concrete foundations but may also include lowering a foundation elevation, entire foundation removal and alsorepparttar 100022 cutting of concrete retaining walls in part or in whole. This type of concrete cutting requires skill and experience to cut perfectly smooth plumb and level openings with virtually no dust or mess, so it is a rather expensive service. Most concrete cutting companies charge a minimum of $425 just to take their equipment to a site and cut.

Homeowners that build additions on to their home that have basements or cellars commonly find they need to cut into their existing concrete foundation to add an entry or passage betweenrepparttar 100023 new and existing basements. It is much easier and in most cases less expensive to have this service performed duringrepparttar 100024 construction process and not after.

Core Drilling isrepparttar 100025 process of drilling perfectly round holes through concrete walls and floors. The diameters ofrepparttar 100026 holes range from 1" to 12" round but average 5" for most homeowner applications. In commercial applications core holes can range anywhere up to 60" round and more. Core holes are used for "utility penetrations" such as electrical, plumbing and heating but are also commonly used for venting furnaces or clothes dryers. Although not recommended, core drilling can be performed by an advanced "do it yourselfer" andrepparttar 100027 equipment necessary to perform core drilling is readily available at your local tool rental and supply store. Most companies have a minimum charge of $250 to core a hole for you and it can take a professional as little as 10 minutes to unload his equipment, corerepparttar 100028 hole, and reload his equipment. Yet, I have seen homeowners rentrepparttar 100029 equipment and spend an entire weekend trying to core a single hole and then call a professional to completerepparttar 100030 project. Just like with any trade a professional concrete cutter will make his job look easy.

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