In one-stop processing of steel structure parts, how to choose the right steel according to the purpose of the structure, load requirements and environmental conditions?
Publish Time: 2024-12-11
When the blueprint of one-stop processing of steel structure parts was first drawn, the selection of steel was like laying the foundation. It was necessary to closely follow the three elements of structural purpose, load application and surrounding environment, and to achieve a stable and durable structure.
When it comes to structural use, industrial plants are like steel-cast production monsters, with machines roaring, vehicles shuttling, and beams and columns bearing dynamic and static loads of several tons. Therefore, low-alloy high-strength structural steels such as Q345 and even Q390 are often selected. They have outstanding yield strength and can withstand heavy pressure, ensuring that the plant structure is as solid as a rock and the deflection is controllable when the equipment is frequently operated and heavy objects are lifted and transported, thus supporting a safety dome for the production line. Bridges are the backbone of roads that span mountains, rivers and lakes. With the daily surge of traffic and the lateral attack of wind, steel materials need to have both high strength and excellent toughness. For example, weather-resistant bridge steel not only meets the strength requirements, but also resists wind and rain erosion and snow-melting agent corrosion with a special alloy formula. It stands at the forefront of the tide for decades, protecting travelers.
Focusing on the load requirements, if it is a column that bears axial pressure, the cross-section design is precisely determined in combination with the compressive strength of the steel. For light-loaded small buildings, Q235 steel can be selected to reduce costs and increase efficiency; for heavy-loaded tall towers, ultra-high-strength steel such as Q420 must be used. Its thick cross-section and high-strength performance can tame huge vertical forces. For bending steel beams, the bending modulus and strength of the steel are considered in coordination. At complex force nodes, it is necessary to ensure that the steel stands firm under composite stresses such as tension, compression, and shear. After rigorous mechanical calculations, the corresponding strength grade steel is matched to prevent local overload disasters.
Looking at the environmental conditions, the seaside salt fog is pervasive, and corrosive particles are everywhere. Weathering steel, with its dense rust layer barrier, protects itself, curbs the spread of rust spots, and maintains structural strength; the chemical workshop is surrounded by acid and alkali mist, and stainless steel series (such as 304, 316) are on stage. The chromium-nickel alloy elements build a strong corrosion-resistant defense line and are not afraid of chemical erosion. In the high-temperature workshop, heat-resistant steel such as CrMo alloy steel can withstand hundreds of degrees of high temperature, and the high-temperature creep performance is controlled. The size is as stable as Mount Tai, ensuring that the equipment can operate smoothly in a hot environment.
From blueprint to entity, the outline is drawn according to the purpose, the load determines the bones, and the environment shapes the coat. The steel is carefully selected to anchor the quality foundation at the front end of the one-stop processing process, so that each steel structure will have its own tough genes when it rises from the ground, withstand the years of grinding, and keep one side stable.
