Methods of surface quality inspection for A283 Gr D carbon steel plate sheet

The company regularly holds sales elites to share experiences, to promote the rapid growth of colleagues, and achieve the company and employees. The company conducts employee skill training and related knowledge video learning from time to time. All these things is to improve the employees' skills and literacy, and reflects its own value. It has always been the pursuit of BBN steel to enhance the employee’s ability and keep up with the times.

40CrMo alloy structural steel specification Grade: 40CrMoStandard: GB/T 3077-1988Mechanical properties:Tensile strength σb (MPa): ≥1080 (110)Yield strength σs (MPa): ≥930 (95)Elongation rate δ5 (%): ≥12Section shrinkage ψ (%): ≥45Impact energy Akv (J): ≥63Impact toughness value αkv (J / cm2): ≥78 (8)Hardness: ≤ 217HBSample size: Sample blank size is 25mm

Rolling of steel plates is the core of the entire steel rolling production process. The billet is deformed by rolling. The rolling process plays a decisive role in product quality. The quality requirements of rolled A283 Gr D carbon steel plate sheet products include the three aspects of product geometry and dimensional accuracy, internal organization and performance, and product finish. Finishing: It is the last process in the A283 Gr D carbon steel plate sheet rolling process, and it is also a more complicated process. It plays a final role in guaranteeing the quality of the product.

The chemical composition of 20CrMo steel pipe is 0.17-0.24, Si: 0.17-0.37, Mn: 0.40-0.70, Cr: 0.80-1.10, Mo: 0.15-0.25. Mechanical properties of 20CrMo steel pipe: tensile strength 410 Mpa; yield strength: 265mpa; elongation after fracture: 24; reduction of area: 60; impact absorption energy: 110J. 20CrMo steel pipe belongs to alloy structure steel pipe, which has high thermal strength, good high-temperature strength, good machinability, medium cold bending plasticity, high hardenability and good welding performance at 500-520℃. A283 Gr D carbon steel plate sheet, 20CrMo steel pipe is generally used in quenching and tempering state.

After years of operation and accumulation, the company has formed an operation network covering major economic cities across the country, with a group of high-quality professional logistics technicians and management personnel, strong strength and stable logistics channels. The company's business operations include the loading and unloading of steel raw materials and finished materials, A283 Gr D carbon steel plate sheet warehousing, and freight transportation. Our logistics service business has passenger transportation, automobile and construction machinery inspection, logistics information management and operations.

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