A “Steel Grade” is a defined chemistry that has been made and processed in a particular way. (A “Standard” specifies away of doing something. It might be a test method, a packaging method, or a delivery protocol.)
Recycling scrap metal means that we avoid the environmental costs of dumped rubbish and the risk of it leaching toxic chemicals into groundwater at landfill sites. … Recycling also ensures materials don’t become litter! • Reducing the need to dig for virgin materials conserves soil integrity and wildlife habitats.
Iron is a mineral that our bodies need for many functions. For example, iron is part of hemoglobin, a protein which carries oxygen from our lungs throughout our bodies. It helps our muscles store and use oxygen. Iron is also part of many other proteins and enzymes. Your body needs the right amount of iron.