An overview of stainless steel grades in terms of strength, corrosion resistance and heat resistance.

Choosing the right material is critical for any application, especially those designed for washing, corrosion, heat, or strength. There are many materials to choose from, among which there are many different specifications. Stainless steel is a popular and affordable option in the packaging industry, especially for food-grade applications. In this article, we analyzed the different grades of stainless steel and each type of stainless steel.

Types of stainless steel alloys The main types of stainless steel alloys are austenite, ferrite, martensite, duplex and precipitation hardening stainless steel. The most widely used and popular is austenite. Austenitic stainless steel is non-magnetic, and its structure allows the material to harden. The subgroups of austenitic stainless steels are 300 and 200. We will review the main grades of stainless steel in the 300 subgroup, as these are the most widely used grades.

303 and 304 and 316 stainless steel 304 stainless steel is a kind of low carbon steel, containing at least 18% chromium and 8% nickel, so the alias of this metal is: 18/8 stainless steel. This type of stainless steel is resistant to oxidation and corrosion. This durability provides convenience for manufacturing and preventing product contamination. 304 stainless steel is considered the most versatile and common austenitic stainless steel, which is more cost-effective than 316 stainless steel.

303 is an easy-to-process grade of 304 stainless steel that contains at least 17% chromium, 8% nickel and 0.15% sulfur/selenium. Adding a small amount of sulfur will slightly reduce the corrosion resistance, but will increase the workability, which is why you will find it can be used for fasteners, bushings, bearings and other smaller parts. Due to the required tolerances, these parts require more precise machining specifications. Although 303 stainless steel still has strong corrosion resistance, for further improvement, 304 stainless steel is recommended.

316 stainless steel contains at least 16% chromium, 10% nickel and 2% molybdenum. The main difference between 304 and 316 stainless steel is that the molybdenum content of 316 stainless steel has increased significantly. The addition of this transition metal can improve the corrosion resistance of 316 and impart high heat resistance up to 1600°F. Similar to 304, 316 stainless steel is chromium-nickel stainless steel. If there are a lot of corrosive elements and/or materials in the environment that will be placed underwater, 316 stainless steel is the first choice.

300 Series Stainless Steel Mechanical Parts Whether your application requires 316 or 304 stainless steel, MISUMI offers a variety of configurable 300 grade stainless steel parts, including plates, tubes, fittings, pipes, fasteners and rods/rods to meet your requirements. Visit our product spotlight page to learn about MISUMI's products. https://www.misumiusa.com

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