Our company is a leading manufacturer of seamless and welded square tubes made with ASTMA6 Q235 20# steel in China. We have years of experience in producing high-quality square tubes that meet or exceed industry standards. Our products are used in a wide range of applications, including construction, machinery, and transportation. We are committed to providing our customers with the best possible products at competitive prices. As a factory, we constantly invest in our manufacturing processes to ensure that we can deliver superior products that meet our customers' expectations. Choose our seamless and welded square tubes for your next project and experience the quality and reliability that our products offer.