What are the surface quality requirements for Q195 steel plates?
No cracks, folds, delamination, or bubbles. Cold-rolled plates must have no obvious scratches, and galvanized plates must have a uniform zinc coating without peeling.
What are the inspection standards for welded joints?
No undercut, slag inclusions, or cracks. Secondary components undergo penetrant testing (PT), and important components undergo ultrasonic testing (UT), conforming to GB 50205.
How significant is the cost advantage of Q195 steel plates?
10%-15% cheaper than Q235, and 30%-50% cheaper than low-alloy high-strength steel, making it suitable for large-scale non-load-bearing component applications.
What are the key points for purchasing and managing Q195 steel plates?
Purchase in batches according to project progress. Cold-rolled plates must be stored in a moisture-proof environment. Avoid scratching the zinc coating on galvanized plates. The inventory period should not exceed 6 months.
What are the anti-corrosion treatment options for Q195 steel plates used in construction? Normal environment: apply primer + topcoat; humid environment: galvanize (≥80g/㎡); highly corrosive environment: galvanize + paint composite protection, or use stainless steel plate instead.