304L is a lower carbon variant of 304 stainless steel used where welding is required. The lower carbon content minimizes carbide precipitation in the heat-affected zone near the weld, which can lead to intergranular corrosion (weld erosion) of stainless steel in some environments.
The carbon content of 304L (UNS 30403) is restricted to a maximum of 0.03%, which prevents sensitization during welding. Sensitization is the formation of chromium carbides along grain boundaries when a stainless steel is exposed to temperatures in the approximate range range of 900–1,500 °F (480–820 °C). The subsequent formation of chromium carbide results in reduced corrosion resistance along the grain boundary leaving the stainless steel susceptible to unanticipated corrosion in an environment where 304 would be expected to be corrosion resistant. This grain boundary corrosive attack is known as intergranular corrosion.
The stainless sheet is easy to cut, form and fabricate. The stainless material will not rust or corrode and is perfect for roof repair, arts and crafts applications and work bench tops.
- For roof repairs or workbench tops
- Use sheet-metal screws or rivets (not included) to attach to other material
- For use indoors and outdoors
- Stainless construction with a mill finish
- Resists rust and corrosion
- Smooth sharp edges with a file or emery cloth to reduce the risk of injury
- Cuts easily with tin snips (not included)
