What is hardenabilityof steel

To harden steel, start by heating the metal directly with a blow torch until it turns a cherry red color. Then, use a pair of tongs to carry the steel to a container filled with water or vegetable, and submerge the hot metal in the liquid. When the liquid stops bubbling, remove the metal from the container and wipe off any excess liquid. To temper the steel so it isn't brittle, place it in an oven heated to 375 °F for 3 hours, and then it let it cool overnight. For more information on using a blowtorch and protecting the steel, scroll down! Did this summary help you?YesNo

To test the hardenability of a ferrous alloy, a Jominy test is used. A round metal bar of standard size is transformed to 100% austenite through heat treatment. It is then quenched on one end with room temperature water. As a result, the cooling rates throughout the material will vary significantly, being highest at the end being quenched. The hardenability is then found by measuring the hardness throughout the bar. The farther away from the quenched end that the hardness exists, the higher the hardenability.

Hardenabilitydefinition Engineering

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What is hardenabilityin Materials Science

The hardenability of a metal alloy is its capability to be hardened by heat treatment. It should not be confused with hardness, which is a measure of the material's resistance to indentation or scratching. It is an important property for welding, since it is inversely proportional to weldability, that is, the ease of welding a material.

Hardenabilityvs hardness

The hardenability of ferrous alloys, namely steels, is a function of the carbon content and other alloying elements, the grain size of the austenite, and the cooling rate. The relative importance of the various alloying elements is calculated by finding the equivalent carbon content of the material. The fluid used for quenching the material influences the cooling rate due to varying thermal conductivities and specific heats. Substances like brine and water cool much more quickly than oil or air. Additionally, if the fluid is agitated, cooling occurs even more quickly. The geometry of the part also impacts the cooling rate; if the surface area to volume ratio is high, the material will cool faster.

Steel is a common durable alloy, and while most steel used in tools is already tough, you can harden it even more to prevent wear and tear. Hardened steel prevents knife blades from dulling and tools from bending and breaking. With a simple heating and quenching process, you can make your steel last for much longer!

If you need to use a blow torch, focus the flame tip on the area you want hardened. Keep heating the steel until you notice a blue color form on the metal. This signifies that the steel is tempered.

This article was co-authored by Himesh Patel and by wikiHow staff writer, Hunter Rising. Himesh Patel is a Metallurgical Engineer at Mcclelland Laboratories in Reno, Nevada. With over five years of industry and graduate research experience in the raw materials industry, Himesh has extensive knowledge of mining and mineral extraction and recovery methods, mine financing, and the environmental impacts of mining. He received his MS in Metallurgical Engineering from the University of Nevada, Reno, and a Dual Degree in Mineral Engineering from the Indian Institute of Technology (Indian School of Mines), Dhanbad. Himesh is passionate about educating the public about the minerals industry. There are 10 references cited in this article, which can be found at the bottom of the page. wikiHow marks an article as reader-approved once it receives enough positive feedback. This article received 28 testimonials and 90% of readers who voted found it helpful, earning it our reader-approved status. This article has been viewed 1,025,105 times.