On the submerged arc welding impact test of Q345R
Thread Content
The boiler products manufactured by the company use Q345R material for submerged arc welding; the welding wire is of type H10Mn2 with a diameter of 5.0 mm, and the flux used is HJ431 with a particle size of 8-40 mesh. Mechanical property tests were conducted, and the results for tensile and bending strength were satisfactory – so why wasn’t the impact strength up to standard? The standard value is greater than or equal to 31
Are the wires of 3.2 and 4.0 qualified? The wire energy has a significant impact on the impact value
Q345R – it’s quite rare to find ones that don’t meet the standards.
If the impact requirement is not met, it is usually due to excessive wire energy input; try again by reducing the welding parameters