316 Stainless Steel vs 18-8 What’s the Difference?

Stainless steel is a versatile metal with many applications in various industries, including construction, automotive, and medical. The two most commonly used types of stainless steel are 316 and 18-8. Both types have unique properties that make them suitable for different purposes. In this blog, we will explore the differences between 316 stainless steel and 18-8, their properties, and the applications for which they’re most suitable.

What is 316 Stainless Steel?


316 Stainless Steel is an iron, molybdenum, nickel and chromium alloy. It contains more molybdenum than other types of stainless steel, making it corrosion-resistant to acidic materials and solutions. As such, it is often used in the food industry for kitchen equipment or in chemical production facilities. It also has excellent strength at elevated temperatures due to its high nickel content.

What is Stainless Steel 18-8?


Stainless Steel 18-8 is a stainless steel alloy of chromium, nickel and carbon. This combination gives it excellent corrosion resistance in high and low temperatures and makes it ideal for many industrial applications requiring strength, durability and heat resistance. It is also very easy to clean and maintain.

Difference Between 316 And 18-8 Stainless steel

Composition


Their composition is the main difference between 316 stainless steel and 18-8. 316 stainless steel comprises 16-18% chromium, 10-14% nickel, and 2-3% molybdenum. On the other hand, 18-8 stainless steel contains 18% chromium and 8% nickel. The higher percentage of molybdenum in 316 stainless steel gives it superior corrosion resistance, especially in harsh environments such as marine and chemical plants.

Corrosion Resistance


Due to its composition, 316 stainless steel is more corrosion-resistant than 18-8. When exposed to saltwater or acidic environments, 316 stainless steel will remain corrosion-free, while 18-8 may show signs of rust. This is because molybdenum improves the alloy’s ability to withstand corrosion and pitting. 18-8 stainless steel suits environments with low to moderate corrosion levels and freshwater.

Heat Resistance


Both 316 and 18-8 stainless steel can handle various temperatures. However, 316 stainless steel is more heat-resistant than 18-8. With its high molybdenum content, 316 can withstand prolonged exposure to temperatures close to the melting point of steel without losing its structural integrity. 18-8, on the other hand, can handle temperatures as high as 1700°F but will start to lose its strength beyond that.

Applications


Due to its superior corrosion resistance, 316 stainless steel is suitable for applications in marine and chemical plants. It’s also used in medical and pharmaceutical applications where hygiene and sterility are essential. 18-8 stainless steel is commonly used in indoor and outdoor applications, such as cutlery, utensils, and brewing equipment. However, 18-8 stainless steel may not be suitable for harsh environments as it can corrode under certain conditions. For more information Visit MarkerMartb2b

Conclusion:


In conclusion, when choosing between 316 stainless steel and 18-8, it’s essential to consider the intended application. If you are looking for a metal that can handle harsh environments, 316 stainless steel is the best choice due to its superior corrosion and heat resistance. On the other hand, 18-8 stainless steel is suitable for indoor and outdoor applications, such as cutlery and brewing equipment. Always consult an expert on stainless steel selection for the best recommendations for your specific application needs.

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