Our company is China's 10th largest supplier & Exporter of stainless steel, carbon steel plate and section, alloy steel plate and pipes. We are specialized in stocking & distributing various Stainless Steel, carbon steel plates, RINA grade A floating dock steel angle steel, H beam steel to worldwide for specific & urgent requirements. We have a fully advanced and modernized warehouse that stores tonnes of our value-adding RINA grade A floating dock steel products, which we source out from the mills that are compliant with the universal guidelines for plate production.
Q690D material is a Chinese standard high-strength welded structural steel. What does Q690D stand for? Q represents the yield strength, 690 represents the yield strength value, and D represents the quality of the Q690 steel. The quality grades are A, B, C, D, and E, respectively. The impact of Grade D steel plate is﹣20°C. Q690D executive standard: GB / T1591-2008. RINA grade A floating dock steel, Q690D steel has high yield strength and tensile strength.
304 stainless steel plate products have strong corrosion resistance. For ordinary alkali solution and organic acid, inorganic acid has good corrosion resistance. This material RINA grade A floating dock steel is a high alloy steel, which can resist corrosion in air or chemical corrosive medium.
The heat treatment process can significantly improve the physical properties of steel, improve the compressive strength, ductility and service life of parts, and improve the hardness and wear resistance. Therefore, critical equipment parts and special tools must be quenched and tempered. The quenching and tempering treatment can also improve the production and processing performance of the RINA grade A floating dock steel product workpiece, thereby improving the production efficiency and production processing quality.
According to GB 11251 technical standard, the chemical composition of 40Cr structural steel plate is as follow: Carbon content is 0.37-0.44 %, Silicon content is 0.17-0.37%, Manganese content is 0.50-0.80%, Chrome content is 0.80-1.10%. 40Cr steel is usually in shape of 40Cr steel plates and bars. RINA grade A floating dock steel, GB 11251 is for 40Cr structural steel plate with thickness range of 4-30mm. The tensile strength of 40Cr structural steel plate is 550-800Mpa. And its min. Elongation is 16%.
Our company will accept the product quality objection registration record, pass it to the RINA grade A floating dock steel production unit and relevant departments, and timely coordinate the supervision of product RINA grade A floating dock steel quality objection. Our company coordinates the relevant department personnel to the customer unit to carry on the investigation, the processing.
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