low alloy steel plate s355jr show overall stability and weak trade trend

The production method of seamless steel pipe can be roughly divided into cross rolling method (menesmann method) and extrusion method. The cross rolling method (menesmann method) is to pierce the tube blank with the cross roll first, and then extend it with the rolling mill. This method is fast in production, but requires high machinability of tube blank. It is mainly suitable for producing carbon steel and low alloy steel tube, low alloy steel plate s355jr tube.

Executive Standards of our low alloy steel plate s355jr, steel plate products: according to the user's requirements, the steel plate can be delivered according to the following standards: national standards, metallurgical industry standards, American ASTM, ASME standards, Japanese JIS, German DIN, British BS, European EN, international ISO standards and relevant standards of special plate. The ship plate can be certified by ABS LR DNV CCS BV KR NK GL RINA.

Smelting process. Reduce the effects of sulfides. The larger the size of sulfide in the billet is, the greater the harm to the steel plate is. The size of sulfide that affects the delamination of the medium thick plate is 5μm, and the sulfide smaller than this size is in a semi-fused state, which basically has no deformation and has no effect on the delamination. In order to obtain fine sulfide inclusions, it is very important to control the sulfur content and the shape of MnS in low alloy steel plate s355jr steel. When the sulfur content in steel is reduced to 0.02% or less, delamination can be effectively prevented.

It is not the thicker the steel plate is, the better. The larger steel plate thickness means higher price and purchase cost, and it is also not inconvenient for transportation. Besides, the thickness of low alloy steel plate s355jr, steel plate has relation to the safety, so the thickness of steel plate is not determined at random, and the size data of steel plate should be strictly planned according to the requirements of drawings. Therefore, it is necessary to select the appropriate steel plate material and specification according to the use.