Iron Gate features: a high-grade materials and technology: 1, Material: GB Q-235A grade steel. 2, the welding process: the use of carbon dioxide gas shielded arc welding. (Weld uniform, strong tightness, firmness good) welding. 3. Surface treatment: hot dip galvanizing process are used outdoors two mid-range materials and technology: 1, Material: Non-standard Q-220B grade steel. 2, the welding process: using manual welding techniques. 3. Surface treatment: hot-dip galvanized products can be rust treatment according to customer demand. Spray paint can, paint and other surface treatment, years of experience make the surface paint paint for many years does not fade. Combining practicality and artistry crafted products, and strive to achieve accurate and correct, so my door every product distinguished extraordinary.