![]() ![]() Stainless steel is very versatile, flexible, and able to withstand rigorous use, which is what makes it popular in a wide variety of industries, whether commercial or residential. If any damage occurs to the atoms, such as a scratch or cut, the oxidation process occurs again rather quickly, forming yet another invisible layer, keeping your steel “stainless” and intact.īecause of its desirable properties, stainless steel can be found in many places, many of which you might not ever expect: The size of the atoms containing chromium and oxide are of similar size, which allows them to sit close together on the surface of the steel, keeping it from corroding. This layer is invisible, yet it is very effective. When chromium hits the air, it works together with the oxygen to create a layer of oxide on the exterior of the steel. Its anti-corrosive properties have made this steel indispensable in many industries, including the medical, automotive, and kitchen appliance industry. This hard metal is what gives stainless steel its most desirable properties, including its lustrous shine and ability to withstand high temperatures. It is particularly suitable for use in chromium alloys, since BORINOX®´s own process execution effectively prevents the precipitation of chrome carbide nitrides.What creates the “stainless” component when forming stainless steel? The answer is simple: chromium. This method is a gas-based low-pressure diffusion process. The BORINOX® process for stainless steel hardening is another way to harden chromium steel. Some of these processes have a negative effect on corrosion resistance. Heat treatments are for instance frequently performed. To this end, further treatment steps are required. It is true that chromium increases the corrosion resistance, but not the hardness properties of steel alloys. Can Chromium Steel Be Hardened?Ĭhromium steel is versatile. Nickel is also an austenite former, like chromium. Nickel as an alloying element extends the protective function against corrosion processes to non-oxidizing acids. ![]() An increased proportion of chromium has a positive effect on the resistance to oxidizing acids such as sulfuric acid. The widely used steel AISI 304 has a chromium proportion of at least 17 %. But in practice, chromium steel is therefore only referred to as such from a proportion of 12 % onwards only. With an increasing proportion of chromium in the alloy, the resistance to corrosion also increases. ![]() ![]() In case of the mentioned value of 10.5 %, chromium steel is only protected against corrosion under normal atmospheric conditions. Stainless, however, does not mean that chromium steel is immune to corrosion in all areas of application. Again, it heals independently in case of attacks. In this case, chromium forms a passive layer above the materials underneath. Steel grades, which meet this requirement, are by definition also called “Stainless Steel”. From a dissolved proportion of 10.5 % in the mixed crystal with austenite or ferrite, the corrosion resistance increases. Chromium is most frequently used to increase the resistance to corrosion. What are the Specific Characteristics of Chromium in Steel Alloys?Īs an austenite former, chromium lowers the critical cooling rate, increases the wear resistance, the scaling resistance and high-temperature strength. But colloquially, chromium steel is generally referred to, so that the widespread steel AISI 304, for example, is also actually a chromium-nickel steel. The most common chromium steel grades also contain nickel. Note on the distinction of chromium steel and chromium-nickel steel. ![]()
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