Appearance Once deburred, the mill finish 304 has a brushed appearance. Take a look at our 304 material page for a much more comprehensive list of material properties and how they can be bent and formed here at SendCutSend for all your parts. Duplex and Precipitation-Hardening grades round out the family tree, but are both rather exotic and expensive, making them best for specialty applications.ģ04 is technically “low-carbon” since it contains less than 0.25% carbon, making it much easier to cold work than higher carbon grades such as tool or spring steel. Stainless steel gets its unique characteristics primarily due to added chromium and nickel, while Manganese (Mn), Silicon (Si), Nitrogen (N), Phosphorus (P), and Sulphur (S) round out the elemental composition.īeing in the Austenitic family means that 304 is generally less magnetic than Ferritic stainless steels, while being more workable and more “stainless” than Martensitic grades. Whether you know it as ASTM A-240, ASME SA -240, UNS S30400, or just plain old 304 stainless, the most significant elements in its composition are carbon and iron, from which all steel is made. In fact, 304 stainless parts cut on our lasers and deburred on their way to you, typically only require a wipe with denatured alcohol as prep for further fabrication. 304 stainless part with ¼” holes after being deburred It is also relatively easy to form (a great choice for sheet metal bending), has great tensile strength and looks good when cleaned up. Since there are several hundred different stainless steel grades, all separated by a few percent of various alloying elements, it became important to differentiate them with a model number of sorts, rather than saying something like, “this one has 0.1% more chromium than the normal stainless steel.”īecause of its chemical composition, 304 is an alloy that’s weather resistant, very strong but still ductile enough not to crack–literally–under pressure, and easily weldable. Not an area code, 304 refers to the steel’s “grade” where 3xx series indicates that it is in the Austenitic family of stainless steels. What is it and why is over 50% of stainless steel produced 304 grade? What does it do well, and where is another material a better choice for your custom laser cut parts? Read on! What is 304? In this article, let’s take a closer look at the true workhorse of corrosion resistant steels: Grade 304 Stainless Steel.
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