E355 Q390 Carbon Steel Rod Diameter 5mm 6mm Mild Steel Rod SUS

S355nl is normalized steel (fine grain steel) in en10025-3:2004 standard Its yield strength and tensile strength correspond to China's Q345 low alloy steel. NL is a low-carbon alloy steel with impact value not less than 27j.s355 required to be tested at a low temperature of minus 50 degrees. S355nl is a normalized steel (fine grain steel) in en10025-3:2004 standard. Its yield strength and tensile strength correspond to China's Q345 low alloy steel. NL is a low-alloy steel with impact value not less than 27j.Z25 refers to the laminar tear resistance test of steel plate in the thickness direction, mainly considering the seismic requirements.What is the difference between S355 and Q345B in welding? SS355 is slightly stronger than Q345B, and the welding is exactly the same.