Q: How does forming/bending difficulty compare?
A: Q235, being softer and more ductile, is easier to cold bend/form. Q345 requires more force and has a higher risk of springback; stricter minimum bend radii apply.
Q: Can Q345 pipes be cold drawn?
A: Yes, Q345 is commonly used for cold-drawn seamless pipes, resulting in higher dimensional accuracy and strength.
Q: How is their machinability?
A: Q235 has better machinability. Q345, being stronger, causes more tool wear and requires more power.
Q: What are typical applications for Q235 pipes?
A: Low/medium-pressure fluid transport (water, air), general structural purposes (fences, scaffolding), non-critical mechanical parts, furniture.
Q: What are typical applications for Q345 pipes?
A: High-pressure fluid/gas transmission, critical structural members (construction, bridges, piling), heavy machinery, pressure vessels, shipbuilding, offshore structures.
