Stainless Steel Rectangle Bar 420 is a rectangular bar made from martensitic stainless steel alloy 420, containing chromium, carbon, and other alloying elements that provide enhanced hardness, strength, and corrosion resistance. Its high mechanical properties and wear resistance make it suitable for applications such as shafts, guides, bearings, valve components, and structural components in various industries where these qualities are required. However, it may not offer the highest level of corrosion resistance compared to other stainless steel grades.