When the phosphorus content of welding steel grade S355J0WP and S355J2WP is very high, special preventive measures should be taken. The original steel of the weathering steel supplier of Wuhan Gang-Ning Science and Trade Railway locomotive has gradually failed to meet the requirements for steel performance. Although the alloy steel has fully met the requirements in all aspects, the cost is too high, and the alloy steel can not be widely used at present. The reason why the cost of alloy steel is so high is that its performance is good in all aspects. It is good to use alloy steel in many places, but there is a taste of overuse.
Weather-resistant steel is not stainless steel. It will also rust in the early stage as ordinary carbon steel, but in the later stage, the situation is different. After corrosion of weathering steel for a period of time, due to the enrichment of trace elements such as Cu, P, etc. on the steel surface, the weathering plate used for landscape gardening forms a layer of dense amorphous rust layer structure, which is firmly combined with the matrix. Weathering steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, towers, photovoltaic, high-speed projects, etc. It is used to manufacture structural components such as containers, railway vehicles, oil derricks, harbor buildings, oil production platforms and containers containing corrosive media in chemical and petroleum equipment.
Like other metal materials, rusted steel plates are easy to shape into rich and varied shapes and can maintain good integrity, which is difficult for wood, stone and concrete to achieve.
Due to the great strength and toughness of steel plate, the distinct space definition ability is not as much as the thickness limitation of masonry material due to its structure. Therefore, the space can be separated very clearly and accurately by using very thin steel plates, making the site simple, bright and full of power.
Environmental protection, no need for later maintenance. The weathering steel is added with alloy elements. After the steel plate is corroded in the atmospheric environment, a layer of dense rust will gradually form on the surface to prevent continuous rust ("rust prevention"). Therefore, it can be used without coating and avoid environmental pollution caused by painting and galvanizing. It is an environmental protection material. No maintenance is required in the later stage.
