New Stainless Steel Door Products can be identified by observing the color. After pickling of stainless steel door material, the surface will show silver Bai Guangjie color: chrome-nickel stainless steel Secheng silver jade; chrome stainless steel color white is slightly gray sheen weak; chromium-manganese nitrogen stainless chromium-nickel stainless steel similar color and slightly lighter. Surface color without pickling of stainless steel: chromium-nickel stainless steel security door brownish-white, chrome steel brownish-black stainless steel security door price, chrome and black manganese nitrogen (three color refers to the color of oxidized heavier). Chrome-nickel stainless steel cold-rolled without annealing, silver reflective surface. Roofs, walls and other large surfaces provide for the building structure with life, to avoid the use of coatings and produce emissions and increase the impact of the environmental footprint of the building approach. If you select the right steel door and its proper maintenance, stainless steel door in the building may never need to replace the lifetime of customized stainless steel security doors, even the life of the building for several years. Stainless steel door door than to maintain higher strength and firmness, while distortion is even smaller. In Europe and Japan, Australia and other countries, is also widely used in stainless steel door seismic design and old house renovation. St. chang products are now all over the country provinces and cities. Good outdoor stainless steel security door _ _ Pan Sheng-chang Industry and Trade Quality stainless steel security door is provided by St. chang Ltd. Yongkang. Yongkang St. chang Ltd. (www.shengchangco.com/about/) quality services and products, and are subject to approval and trust of new and old customers and the industry. Our company is a certified member of the whole network Commercial Union, Commercial Union Support icon on the page, you can talk directly to our customer service staff, to our future cooperation happy!