Stainless steel cladding examples

Bank Boston, Sao Paulo, Brazil

Type 316 Stainless Steel (Courtesy of NucleoInox)

Bank Boston’s new South American headquarters in Sao Paulo was completed in 2002. The 30-story Corporate Office Building was designed by the US architecture firm Skidmore Owings & Merrill, LLP in conjunction with the Brazilian architecture firm Escritório Técnico Júlio Neves.

Three stainless steel finishes were used: No. 4 polish (2J) on window frames, railings, column covers, the entrance canopy, and other details, black electrochemically colored details, and coined cambric spandral panels.

Sao Paulo has high levels of urban pollution, including very high levels of air borne particulate,which creates an aggressive atmosphere for architectural metals. To avoid corrosion staining a molybdenum containing stainless steel, Type 316, has been chosen. To further improve corrosion resistance and to minimize dirt accumulation smooth surface finishes were selected.

Window washing tracks were included in the design to facilitate the planned quarterly cleaning of the windows and wall panels.

Canary Wharf, London, United Kingdom

Type 316 stainless steel, coined cambric and fine No. 4 (2K) finishes on the exterior (Courtesy of Outokumpu)

The architectural firm, Cesar Pelli & Associates, USA, designed the signature initial tower, One Canada Square, that began the redevelopment of London's Canary Wharf Complex.

The forty-eight storey tower was completed in 1990 and became the UK's tallest building. Cesar Pelli, always specifies molybdenum containing Type 316 stainless steel for exterior applications. In London, where urban pollution and a coastal environment contribute to the corrosiveness of the environment, this stainless steel has remained beautiful.

Cheung Kong Center, Hong Kong, exterior detail

Type 316 stainless steel (Courtesy of Nickel Institute, Photographer: Tim Pelling)

Hong Kong's 63-story Cheung Kong Center was completed in 1999. It was designed collaboratively by the US architecture firms Cesar Pelli, Leo A. Daly, and the Hong Kong based firm Hsin-Yieh. Coined HyClad Cambric and a fine No. 4 finish were used on the exterior.

Cheung Kong Center has retained its original attractive appearance despite its location in a corrosive environment only a few blocks from the bay. The molybdenum containing Type 316 stainless steel, the smooth surface finishes, regular manual washing, and the heavy seasonal rains that wash the stainless steel surfaces naturally ensure that this building remains stain-free.

Mapfre Tower, Barcelona, Spain

Type 316 stainless steel (Courtesy of Acerinox)

The Mapfre Office Tower was designed by the Spanish architecture firm, Ortiz-Leon Arquitectos, as an environmentally conscious building. This office tower was completed in 1992 as part of Barcelona’s Olympic village and is located directly on the Mediterranean Sea. 

The climate is warm and humid with infrequent rain. Exterior metals are exposed to both sea salt and high levels of sometimes corrosive air borne particulate from loading and unloading ships in the nearby port. This constitutes a very aggressive atmosphere for architectural metals.

The stainless steel has remained pristine due to its smooth surface finish, selection of the right molybdenum containing stainless steel grade, and a rigorous cleaning schedule.