Tolerance of a242 type 1 weathering bridge steel material plate steel tube

The quality inspection department is responsible for the inspection management of raw materials and finished products, and the quality inspection and acceptance of products and raw materials. Strictly abide by the company's management system, conscientiously exercise the management power given by the company, and put an end to all ultra vires; be responsible for the inspection of all kinds of raw materials entering the company, and put forward quality problems and handling opinions.

a242 type 1 weathering bridge steel material plate and so on medium and heavy plates are widely used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridge construction and so on fields. The surface quality problems of medium and heavy plates not only affect the appearance of the products, but also reduce the corrosion resistance, wear resistance, fatigue limit and other properties of the steel plate. Therefore, the medium and heavy plates manufacturers and users attach great importance to it. The surface quality of medium and heavy plate mainly refers to the surface smoothness, surface defects, etc., which is one of the main quality indexes of medium and heavy plates.

"A204 Grade C steel chemical composition(%)Carbon max.: 0.28 Manganese max.: 0.90Phosphorus Max.: 0.025Sulfur Max.: 0.025Silicon: 0.15-0.40Molybdenum: 0.45–0.60a242 type 1 weathering bridge steel material plate, A204 Grade C steel mechanical propertiesFor boiler steel plate A204 Grade C, the yield strength shall be above 295 Mpa, tensile strength from 515 Mpa to 655 Mpa."

Blast furnace ironmaking is a traditional ironmaking method based on coke energy. It cooperates with converter steelmaking and is the main method of producing a242 type 1 weathering bridge steel material plate steel at present. This dominance of blast furnace ironmaking is not expected to change for quite a long time. The essence of blast furnace ironmaking is the reduction of iron. Besides, coke is used as fuel and reducing agent. At high temperatures, iron ore or iron-containing raw materials are reduced from an oxide or mineral state to liquid pig iron.

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