Color case hardening (sometimes referred to as case-hardening, case color hardening, or surface hardening) is a heat treating process and one of the earliest ways of hardening lower-grade steel. No hardening would result, as 1200°F ⦠Case hardening processes harden only the exterior of the steel part, creating a hard, wear resistant skin (the "case⦠How to Prevent Case Hardening Use the correct temperature. You can initially set the temperature 10 degrees above if you have a ⦠The theory is this: When low-carbon steel reaches a certain temperature⦠Case ⦠PLAY. Case Hardening: Case hardening is done by red heating the steel, infusing carbon onto the surface and quickly quenching. Heat Treatment: In ⦠For Example: 4320 carburized at 1700ºF for 11 hours at temperature would attain âcase depthâ of 0.083 inches. Engineering Materials Applications & Design. To case harden a part, the finished low-carbon steel part is heated, and then packed with a high-carbon compound, like Rose Mill's Cherry Red instant hardening compound. Source: Metal Progress, August 1943. Keeping the correct temperature is key to preventing case hardening. Heat Treatment Process-Annealing, Normalizing, Hardening, Tempering, Nitriding, Cyaniding Process, PDF. For example, an initial carbon temperature ranging between 1650 to 1700 °F produces an SAE steel ⦠1425°F is the minimum recommended case hardening temperature and it takes a lot less time at the maximum of 1625°F. A method for case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activated surface at a temperature below that temperature ⦠Hardening, Case Hardening and Tempering. Originally, this process used bone charcoal heated to an exact temperature⦠If you heated AISIC 1080 steel to 1200°F (649°C) and quenched it in water, what would happen? Carbon Steel Typical Heat Treatments Case Hardening Grade Table Chart. Carbonnitriding is done by using a liquid salt bath (cynaide was commonly used) and the time/temperature ratio is supposed to be more or less the same for case hardening ⦠Surface Hardening: Surface hardening is done by heating the steel up to austenitizing temperature while keeping the core below that temperature ⦠Process Nature of case Process temperature C F Typical case depth Case hardness, HRC Typical base metals Process characteristics Carburizing Pack Diffused carbon 815â1090 1500â2000 125 mmâ1.5 mm (5â60 mils) 50â63(a) Low-carbon steels, low-carbon alloy steel Low equipment costs; difï¬cult to control case ⦠Reading Time: 5 minutes. Amrit Kumar. Table of Contents show. STUDY. materials. Case hardening steel grades depend on the temperature used during the treatment process. If 0.100 inches were specified it would require 16 hours.