Stainless steel is a common metal used in multiple industries due to the fact that it is resistant to corrosion and staining alike. The most popular grades of stainless steel used in the family of stainless steel are grade 304 and grade 316. Although they may seem alike, upon further inspection, there are some differences between the two that may impact which one will be able to function better in a given setting.
Being able to make the distinctions of what would work well in your project versus what will not will be crucial, especially if durability, strength, and the ability to withstand the elements are issues.
What is 304 Stainless Steel?
304 stainless steel is the most widely used chromium-nickel stainless steel alloy in the world. It is part of the austenitic family of stainless steels, containing approximately 18% chromium and 8% nickel. This grade is commonly considered to be the most common austenitic stainless steel and has superior corrosion resistance, formability, and weldability.
It works well in many factors and will not rust or oxidize in the traditional atmosphere. Due to its versatility and relatively low cost, 304 stainless steel is widely used in:
- Kitchen equipment and appliances
- Food processing equipment
- Architectural structures and trim
- Tanks, pipes, and fittings
- Automotive and aerospace components
What is 316 Stainless Steel?
316 stainless steel is another austenitic alloy but with a slightly greater chromium level at 16% chromium, 10% nickel, and 2% molybdenum. 316 stainless steel is differentiated by the addition of molybdenum. This component adds to the corrosion resistance of the steel, especially against chlorides and other industrial solvents.
It is another great option and won’t corrode under harsher conditions where 304 may over time. Some of the typical applications of type 316 are
- Marine environments and boat fittings
- Chemical and pharmaceutical equipment
- Coastal architectural structures
Medical devices and surgical tools - Food and beverage processing in high-saline conditions
Key Differences Between 304 and 316 Stainless Steel
| Feature | 304 Stainless Steel | 316 Stainless Steel |
| Composition | 18% Chromium, 8% Nickel | 16% Chromium, 10% Nickel, 2% Molybdenum |
| Corrosion Resistance | Excellent in general settings | Superior in marine or chloride-rich environments |
| Cost | More affordable | More expensive due to molybdenum |
| Applications | General-purpose use | Specialized use in harsh conditions |
Molybdenum is added to 316 stainless steel for increased corrosion resistance, particularly in salty environments. But assuming your application isn’t subject to those types of things, 304 is typically the perfect compromise between performance and cost.
Which One Should You Choose?
The choice depends on the use and the environment in which the metal will be used. 304 stainless steel will work fine if your application is indoors or in a less corrosive environment. If your project is in a marine or corrosive environment, the 316 finish is the better choice for long-term corrosion resistance.
Looking for Quality Stainless Steel in Los Angeles?
At BobCo Metals, you can buy 304 stainless steel and many other high-performance grades of stainless steel. Proudly serving Los Angeles and surrounding areas, we are your source for reliable metal supply, custom cuts, and handyman support.
Visit BobCoMetals.com to view our inventory or contact us to speak with a metals specialist today!
