Steel processing, Peng Jian steel (certified), provided by the Dongguan City, Guangdong Steel Steel Ltd. Peng Jian. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) is specialized in the "Steel" business, the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Xu. Steel plant how to corrosion? Steel design requirements stated in strength grade of steel, connecting material model, form and weld seam quality grade and construction requirements. A grade steel does not guarantee the toughness, the carbon content is not as delivery conditions, it can not be used for earthquake-proof and welded structures (This statement is not accurate, but the designer can accept, in fact, can not be welded or weld steel, carbon equivalent decision, rather than the carbon content); in the actual project, in addition to the lower flange of large-span heavy duty crane girder docking, and docking of large-span steel bridge tension member of this high quality requirements requires a weld seam, other occasions a rarely used. Generally require two. For fillet welds, in addition to the requirements of penetration (eg for fillet welds wheel pressure on the larger crane beam flange and web connections), which requires two external quality grade steel plant in Dongguan, on other occasions generally use three. Steel Works steel production is mainly structural steel is one of the more common modern construction projects in the form of structure. Ours is the first manufacturer to use the National Rail load-bearing structure, much in the era of Qin Shihuang (246-219 BC), the would have to do a simple load-bearing structure with iron, while Western countries began to use metal load-bearing structure in the 17th century. 3-6 century AD, intelligent and hard-working people of our country to build iron chain suspension bridge with chains, the famous chain bridge in Sichuan Luding Dadu, Yunnan and Guizhou Yuan River Bridge River Bridge, etc. are examples of early plate iron load-bearing structure of the body . Although China has achieved great success in the early iron structure, but since 2000 the shackles of years of feudalism, science developed, therefore, long-term stay at the level of iron buildings. Until the late 19th century steel processing, China began using modern steel. After the founding of New China Steel factory in Dongguan, steel applications has been greatly developed, both in quantity and quality, or far more than in the past. In technical terms, such as design, manufacture and installation have reached a higher level, the design and construction techniques mastered complex of buildings in the country has built a number of huge and complex structure of steel plant, large-span steel civil and railway bridges and other structures, such as steel roof of the Great Hall, Beijing and Shanghai stadium steel grid, Shaanxi Museum of Terracotta Horses commission three hinged steel arch and the Bird's Nest in Beijing and so on.