304 and 316 are the two most common grades of stainless steel. Judging by the name, you might assume that stainless steel never stains—but you’d be wrong.
Stainless steel stains less easily than other iron-based metals, but it’s not literally “stainless”. Just like standard steel, stainless can get marked up by fingerprints and grease, develop discoloration, and eventually rust. The difference is resilience. Stainless steel can withstand much more time and abuse before showing signs of wear.
All steels have the same basic iron and carbon composition, but stainless steel also contains a healthy dose of chromium—the alloy that gives stainless steel its famous corrosion resistance.
And this is where things get complicated. There are multiple grades under the stainless steel umbrella, each with slightly different alloy composition, and therefore slightly different physical characteristics.
For outdoor furnishings like rails and bollards, stainless steel is an ideal corrosion-resistant material, but it will only withstand long-term exposure if the grade is appropriate for its environment. 304 is an economical and practical choice for most environments.
Most of the digital door locks in Avent Security used the stainless steel 304 as the raw material. make of stainless steel material ( grade 304 ) as raw material. This stainless steel is purposely designed to absorb more energy without breaking. The stronger resistance to corrosion keeps a longer life time for the finish.