The branded structural steel tube company on Thursday registered an 8.67% rise in sales volume to 435,348 ton in Q4 FY21 compared with 400,616 ton in Q4FY20.The company registered sales volume of growth of 0.43% to 16,40,353 ton in FY21 from 16,33,310 ton recorded in FY20, despite Covid-19 disruptions. "This highlights APL Apollo's strength in maintaining its dominant leadership in structural steel tubes market and increasing its market share to 50% from 40% since March 2020," the company said in a press release. On a sequential basis, total sales declined 10.34% last quarter from 485,579 ton reported in Q3FY21. Shares of APL Apollo Tubes were trading 5.33% lower at Rs 1325.90 on BSE.