Extended Notes - SS Grade 304 vs 316

  • Category: Web Articles
  • Client: NIVDU
  • Project date: 16 June, 2020
  • Caution : These articles supplement Commodity Guides maintained by NIVDU of Sri Lanka Customs. They contain general information about commodities and their various aspects that have an impact on value.

These two grades of stainless steel are identical in appearance. But, due to their composition, there are significant differences between the two materials.

Stainless steel of SS grade 316 consists of 16% Chromium, 10% Nickel and 2% Molybdenum. Compared to SS grade 304, Chromium percentage is lower while Nickel percentage is higher. Furthermore, SS grade 304 does not consist of Molybdenum.

Due to these differences, SS grade 316 stainless steel is more corrosion resistant, suitable for marine applications and consists of lasting durability. These advantages come at higher cost. For example, nuts and bolts made out of SS grade 316 stainless steel can cost 40% - 60% higher against similar SS grade 304 counterparts. The higher cost is mainly attributed to the inclusion of molybdenum.