When you need a high-quality steel with the hardness you depend on for a variety of projects, EN19/SAE4140 is the one you want. EN19 is a high-tensile alloy type of steel that you usually receive in a readily machinable “T” condition. It provides shock-resisting properties and is wear-resistant as well, and it always provides very good ductility. You can also harden it by heating it uniformly to 1500/1545° Fahrenheit until it is heated all the way through, then quenching it in oil.
Lots of Versatility
When you want to temper EN19, just heat it uniformly and thoroughly once again like you do when you wish to harden it, using the selected temperature for tempering. Afterward, hold it at heat for one hour for every inch of total thickness. Although the numbers for this type of alloy steel can change slightly in different circumstances.
