Not all stainless steel is the same.

This side-by-side comparison shows why grade selection matters in real service conditions.

316 stainless steel stays clean and stable because it contains molybdenum. That extra alloying element significantly improves resistance to pitting and crevice corrosion in chloride-bearing environments such as coastal sites and process plants.

304 stainless steel performs well in many general applications but without molybdenum it is more likely to discolour and develop surface corrosion where chlorides are present.

Carbon steel will oxidise quickly unless it is protected by coatings, corrosion allowance or a controlled environment.

If you’re specifying for outdoor exposure, washdown areas or marine atmospheres, the decision between 304 and 316 is not academic — it directly affects lifecycle cost, maintenance and downtime.

If you’d like support selecting the right grade for your environment, speak to the dedicated stainless steel specialists at Steel Dynamics UK.