Most of the letterboxes we manufacture are made with stainless steel, since it’s a corrosion proof material that can withstand rain and other weather conditions, and won’t rust in the long run. We take our commitment to durability a step further by using 316 Marine Grade Stainless Steel when manufacturing all our stainless steel letterboxes with an N4 (brushed) finish for all its letterbox face panels and plaques, with the exception of the Corten range.


Stainless steel refers to a range of corrosion resistant alloy steels containing more than 10.5% chromium. Their resistance to weather elements makes them an ideal for outdoor use. Stainless steel also offers excellent weldability, formability, fabricability and ductility, and is also easy to clean and maintain. 316 grade is the second most popular stainless steel variant, and accounts for about 20% of all stainless steel produced.


316 grade stainless steel is considered a ‘step up’, due to its high resistance to corrosion, as compared to other stainless steel variants, such as the 304 grade. Grade 304 and 316 enjoy the same mechanical, physical and fabrication characteristics, but the 316 comes with stronger corrosion resistance, especially pitting and crevice corrosion in warm chloride environments.


Grade 316’s rust resistant characteristics makes it the ideal material for more volatile environments, such as buildings and structures closer to the sea, and fittings on wharves and piers. Additionally, it can be cleaned easily, making it an ideal material to manufacture letterboxes that are sturdy and durable.


Interested in custom letterboxes for your new home? Contact Letterbox Shop today for letterboxes that will last a lifetime.