The hardness of hot rolling acid washing rolls is greater than 90 degrees. Because hot-rolled acid-washing rolls did not undergo annealing, their hardness was high and was generally greater than 90 degrees.

Answers

• 
  Why are seamless steel pipes stronger? 31/10/2025 14:08:30
• 
  Is stainless steel wire better at preventing rust than galvanized steel wire? 31/10/2025 07:36:00
• 
  How to distinguish between hot-dip galvanizing and cold-dip galvanizing? 28/10/2025 14:16:19
• 
  What are the production processes and differences between welded steel pipes and spiral steel pipes? 27/10/2025 16:41:23
• 
  What are the characteristics of double-sided submerged arc spiral steel pipe? 27/10/2025 08:16:52