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Wrapped with Stainless Steel: Sustainable Facade and Roof


1 Advantages of stainless steel in sustainable design

(1) Strong corrosion resistance

The corrosion rate of copper and aluminum exposed to salt and polluted environments is usually 10-100 that of stainless steel

Times [1]. Proper selection and maintenance of stainless steel will be followed in decades or even centuries.

Of course safe and sound.

(2) High recyclable ingredients

Stainless steel can be recycled 100% without degradation and recycling, so it can be unlimited

Recycling will be carried out regularly to produce more stainless steel. Stainless steel does not have during use

Any metal loss does not need to be replaced by pure new materials. Therefore, the deterioration of the metal will affect the ring

The negative impact of the environment is minimized. Given its high residual value, 80%

The stainless steel is separated from the garbage dump and used to regenerate new stainless steel. The designer can make

Use a design that facilitates the separation of parts and materials to improve the recovery rate after the end of the service life. ratio

For example, in the composite panel design, different metals are combined together, if in the service life

After termination, the materials are not easy to separate, which will restrict recycling. In contrast, a single species

The skin panel does not have this problem

(3) Low energy consumption

Stainless steel roofing and wall panels help reduce the energy demand of buildings and urban heat islands

Effect (UHI). The uncoated stainless steel products can meet the solar reflection of the inclined roof

Radiation Index (SRI) requirements to reduce the heat island effect, the requirements are set by the US Green Building Council

Special coatings with the same high scattering and SRI value used on aluminum and galvanized steel can also be used in the same way

Used in stainless steel. As long as the metal surface is smooth, there is no obvious difference in the SRI value of different metal coatings

do not. Therefore, stainless steel with a special high SRI value coating can also meet LEED inclined houses

Requirements (such as SRI>78). The use of coated stainless steel is the main

The advantage is that the corrosion resistance of the base layer is significantly improved. This means that the performance of stainless steel

It is similar to uncoated metal and is substantially better than some ordinary roofing products (table

1). In addition, the low corrosion rate of stainless steel helps to preserve the SRI value for a long time (regular

Clean up accumulated dust). Since these values vary with the type of stainless steel surface and alloy type

Subject to change, the manufacturer should be required to provide product-specific specification data. For all

For coated metal products, SRI values are generated according to low, medium and high wind intensity levels

to make.

(Sustainable Site Plus) proposed by the Leadership in Energy and Environmental Design (LEED)

Sub-item 7.2, heat island effect roof requires SRI≥29, slope>2:12).

For example, the SRI value of the popular proprietary grades of low-reflection uncoated stainless steel products

It is 39~45 at moderate winds, 55~61 at higher winds, austenite (such as 304 and

316) and economical duplex stainless steel is applicable. The polished product conforms to ASTM International

The No.4 surface of A480 requires finished plate products, "Flat rolled stainless steel and heat-resistant steel

The Standard Specification for General Requirements for Plates, Sheets, and Strips has a higher SRI value. No. 4 surface finish

The SRI value of a proprietary variety in the product is 60 at moderate winds.


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