What are the characteristics of the cold working properties of Q195 steel plate?
It has good plasticity and can be stamped, bent, and sheared. After cold work hardening, its strength increases but its toughness decreases, so the amount of deformation during processing needs to be controlled.
What are the welding methods for Q195 steel plate?
It is compatible with shielded metal arc welding (SMAW), CO₂ gas shielded welding, and argon arc welding (argon arc welding). It has excellent weldability and is not prone to cracking.
What welding rods/wires should be used for welding Q195 steel plate?
E4303 (J422) welding rods and ER50-6 welding wire should be selected to match their low-carbon characteristics and ensure the performance of the weld joint.
Is preheating or post-heating required for welding Q195 steel plate?
No preheating is required at room temperature. For plates thicker than 12mm or for low-temperature construction (≤-5℃), preheating to 50-100℃ is necessary to prevent cold cracking.
What are the main welding defects of Q195 steel plate? Burn-through (in thin plates) and porosity are likely to occur, so the welding current should be controlled (≤160A) and a short arc welding process should be used.