1. Preheating Preheating helps reduce the peak hardness of the heat-affected zone (HAZ) of medium-carbon steel and prevents cold cracking. It is a key process measure for welding medium-carbon steel. Preheating also improves joint plasticity and reduces post-weld residual stress. Typically, the preh Read More

The 20G high-pressure boiler tube market, which had been fluctuating and consolidating, saw prices surge again, boosted by news, with a single-day price increase of 80-120 yuan/ton. The last time such a significant increase occurred was in early August, also driven by the coal-to-gas policy, marking Read More