Â­Steel is iron that has most of the impurities removed. Steel also has a consistent concentration of carbon throughout (0.5 to 1.5 percent). Impurities like silica, phosphorous and sulfur weaken steel tremendously, so they must be eliminated. The advantage of steel over iron is greatly improved strength. The open-hearth furnace is one way to create steel from pig iron. The pig iron, limestone and iron ore go into an open-hearth furnace. It is heated to about 1,600 degrees F (871 degrees C). The limestone and ore form a slag that floats on the surface.
$7.20. 1  Cost can add up quickly, especially if youâre a novice and have never attempted a T & G Siding installation before. 2  Be sure to have a copy of the T & G Siding Manufacturerâs recommended installation requirements before starting, to make sure your project doesnât end up costing you more money in the long-run.
These SIM-only options from TPG are a fair bit cheaper than the plans on the Next G network, though. Starting at $19.99 per month, a Small plan includes $500 worth of calls and text and 100MB of data per month. 2-minute calls cost $2.38 and SMS cost $0.25 per unit. All plans include unlimited calls to other TPG mobile and any TPG home phone services. As with previous TPG phone plans, the T3G plans operate on the Optus 3G network.