1.What are the surface treatments for Q235B steel pipes?
Answer: Common treatments include galvanizing, painting, or coating to enhance corrosion resistance and appearance.
2.What are the surface treatments for 20# steel pipes?
Answer: Treatments like phosphating, blackening, or chrome plating are used to improve corrosion resistance and surface hardness.
3.What are the testing methods for Q235B steel pipes?
Answer: Testing includes tensile testing, impact testing, hardness testing, ultrasonic testing, and hydrostatic testing.
4.What are the testing methods for 20# steel pipes?
Answer: Testing methods include chemical analysis, tensile testing, impact testing, non-destructive testing (UT or RT), and pressure testing.
5.Can Q235B and 20# steel be heat treated? What are the effects?
Answer: Q235B is typically used as-rolled but can be normalized. 20# steel can be heat treated (e.g., annealing, normalizing, quenching and tempering) to improve strength and toughness.
