Wrought iron has a much lower carbon content (usually less than .08%), but it contains small amounts (1 to 2%) of slag, the byproduct of iron ore smelting consisting of silicon, sulfur, phosphorus, and aluminum oxides). The lower mixture of carbon makes the metal more malleable and ductile. As the material is heated, reheated, and hammered into shape the slag is worked out of the iron and the material grows progressively stronger and more fibrous in composition. Wrought iron will often undergo at least about a half dozen cycles of heating and working.
Metal door knobs are available in a variety of materials, including brass, stainless steel, and bronze, each offering unique characteristics that cater to different design preferences. Brass, for example, is renowned for its warm tone and traditional look, often associated with classic architecture. Its natural resistance to corrosion and tarnish ensures longevity, making it an ideal choice for outdoor gates and entryways. Stainless steel, on the other hand, is celebrated for its modern, sleek appearance. This material not only provides a minimalist aesthetic but is also extremely durable, able to withstand harsh weather conditions without losing its shine or structural integrity.