Before welding, preheat should be carried out according to the ASTM A36 welding process, and set up a good temperature measuring point.The number and thickness of weld layers, as well as the temperature between weld layers, should be controlled.And after each welding, the corresponding heat preservation treatment should be carried out.After ASTM A36 welding the weld, and after 24 hours, then you can carry out ultrasonic nondestructive testing, but the ambient temperature should be up to the standard.
ASTM A36, S355JR is a European standard low alloy high strength structural steel, which is in accordance with EN10025-2. The hardness of S355JR steel is 70-80B, and the yield strength of S355JR steel is 355MPa. JR stands for quality level, equivalent to level B in ChinaChemical composition of S355JR steel: C: < 0.22; Si: < 0.55; Mn: < 1.60; P: < 0.025; S: < 0.025S355JR steel is equivalent to Q345B in China.
Many construction occasions will use steel plate cutting, it not only improves the utilization rate of materials, but also speeds up the work efficiency. There are many ways to cut ASTM A36 steel plates, but if you want to both efficient and stable to complete the cutting of steel plates, it is recommended to use laser cutting.
Novel coronavirus pneumonia has been closed in recent years, and Pohang iron and Steel Co., Ltd. closed its overseas processing center in Italy, Malaysia, Philippines and India. At the request of the Italian government, all production activities will be stopped except for the necessary ASTM A36 products. POSCO-ITPC, an Italian stainless steel cold rolling mill near Verona in northeast Italy, is scheduled to close from March 26 to April 3.
