For the experiment, 1045 and 4140 steels were used for quenching with water, oil, air cool- ing, and oil cooling to investigate its effects on the metal properties. For tempering, 1045 steel was tempered at 300oC and 500 oC for 10, 20, 35, 55, and 80 mins. 4140 - Ellwood Specialty SteelTempering temperatures range from 400 F to 1200 F depending upon the hardness level desired. The lower the tempering temperature the greater the hardness of the alloy. For example tempering at 600 F gives a tensile strength of 225 ksi while tempering at 1000 F will give 130 ksi.
4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000 Mpa (condition T).4140 is now available with improved machinability, which greatly increases feeds and/or speeds, while also extending tool life without adversley affecting mechanical properties. A Metallurgical Investigation of the Effects of Double A Metallurgical Investigation of the Effects of Double Tempering on the Hardness, Impact Toughness and Microstructure of AISI 4140 Steel A Major Qualifying Project Submitted to the Faculty of Worcester Polytechnic Institute in partial fulfillment of the requirements for the Degree in Bachelor of Science in Mechanical Engineering AISI 4140 Alloy Steel (UNS G41400)AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace. Tempering AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has lower tempering temperature.
Mar 20, 2011 · Tempering 4140 at 600 deg makes 4140 49 RC. 4140 should be tempered at 400 deg for a hardness of 57 RC. Now I know what steel I'm working with and how to harden it. Thanks Glenn, Jim. Tool & Die Maker/Electrician, Retired 2007 So much to learn and so little time. How to quenching and tempering of 4140 alloy steel4140 alloy steel rolling process:Use Rolling mill will steel ingot rolled into 180mm ~ 310mm. Since 4140 steel containing Mn and S, for the steel ingot of hot delivery use the soaking temperature 1260 in the production process, soaking time 3h, so you can make the steel ingot was burn-through, the steel rolling uniform deformation. Temper Embrittlement - Metal and Metallurgy engineering Jun 24, 2009 · Specifically, with 4140, if you are in a quenched and tempered condition and your tempering temperature is below 1000 F, you are going to have low toughness. If you are dealing with a large shafts and rotors for power generation, for example, you are
Sep 07, 2012 · AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can