Choosing between 304 and 316 stainless steel is one of the most common decisions OEM buyers face. Both are austenitic stainless steels, but they differ in ways that matter significantly for industrial applications.
The Key Difference: Molybdenum
316 stainless steel contains 2-3% molybdenum, which 304 does not. This significantly improves resistance to chloride-induced pitting and crevice corrosion – making 316 the standard choice for marine, food processing, chemical handling, and coastal applications.
| Property | SS 304 | SS 316 |
|---|---|---|
| Molybdenum | None | 2-3% |
| Chloride resistance | Good | Excellent |
| Cost (relative) | Lower | 15-25% higher |
When to Use 304
304 is the workhorse grade – cost-effective and suitable for most indoor, non-marine industrial applications: control panel enclosures, food service equipment in non-saline environments, and general industrial structures.
When to Specify 316 or 316L
316 is required for: seawater or salt spray exposure, chlorinated cleaning chemicals, pharmaceutical or food processing with CIP cleaning, and coastal or offshore installation. 316L (low carbon) is preferred for welded assemblies in corrosive environments to reduce sensitization risk.
Need help selecting the right grade? Contact Conwhole Hardware – we review material specifications as part of our standard quoting process.