4140 Steel Heat Treatment Process

3 tempering recommendations from the asm heat treaters guide for 4140 4142 is a minimum of 400 f.

4140 steel heat treatment process.

For 4140 steel the recommended heat treatment 1 consists of heating to austenitizing temperature typically 1570 f 855 c followed by oil quenching. Not all steels are improved by cryogenic treatment. Aisi sae 4140 alloy steel can be made into round steel bar flat square steel bar steel. 1 4140 is an ok die steel but is not recommended for radical shaped dies such as narrow fullering crown and so on.

Tempering reheating after quenching will achieve the desired hardness range. You find 4140hw in a. 4140hw alloy steel technical data 4140hw meets aisi4140 standards and has improved hardenability and strength in heavier cross sections. This leaves near full hardness.

Sae 4140 aisi 4140 steel is a cr mo series chrome molybdenum series low alloy steel this material has high strength and hardenability good toughness small deformation during quenching high creep strength and long lasting strength at high temperature. Three types of heat treatments were applied in this work. Heat the steel to 1 675 degrees fahrenheit in a heat treat furnace or forge and hold it at that temperature for approximately 30 minutes per inch of length to normalize the steel. But it should be tempered for any heavy use.

Commercially available aisi 4140 steel has been studied to determine the effect of heat treatment processes on fracture toughness k. Dry ice is solid at 108 76 f 78 2 c. Fundamentals of the heat treating of steel 11 steel however is by far the most widely used alloy and for averygood reason. Normalizing removes any stresses within the steel that could create cracks when hardened.

It is also part of a complete heat treatment not a replacement or simple secondary treatment. 2 fully hardened 4140 ranges from 54 to 59 hrc. Alloy description timkensteel s 4140hw grade is a fine grained low alloy steel that offers optimum heat treat response in heavier cross sections.