For example, “green steel” is often seen. For some people, it is just a marketing term with neither definition nor scope. You can use it whenever you want. But others believe that “green steel” is a term that requires certification. To use this term, it must cover the entire scope of sustainable development. Although these two groups of people are a bit extreme, how “green” does it need to be called “green steel”? Is the “green steel” I call “clean steel” or “zero carbon steel” what you call? Where exactly is the dividing line between “net zero carbon steel”, “zero...

Steel has had a major influence on our lives, the cars we drive, the buildings we work in, the homes in which we live and countless other facets in between. Steel is used in our electricity-power-line towers, natural-gas pipelines, machine tools, military weapons-the list is endless. Steel has also earned a place in our homes in protecting our families, making our lives convenient, its benefits are undoubtedly clear. Steel is by far the most important, multi-functional and most adaptable of materials. The development of mankind would have been impossible but for steel. The backbone of developed economies was laid on...

Carbon – is generally considered to be the most important alloying element in steel and can be present up to 2% (although most welded steels have less than 0.5%). Increased amounts of carbon increase hardness and tensile strength, as well as response to heat treatment (hardenability). Increased amounts of carbon will reduce weldability. Sulfur – is usually an undesirable impurity in steel rather than an alloying element. In amounts exceeding 0.05% it tends to cause brittleness and reduce weldability. Alloying additions of sulfur in amounts from 0.10% to 0.30% will tend to improve the machinability of a steel. Such types may be...