DIN2391 Standard St52 Seamless Steel Burnished Tube with H8 Tolerance

DIN2391 Standard St52 Seamless Steel Burnished Tube with H8 Tolerance. DIN2391 Standard Compliance: ST52 seamless steel tubes meeting DIN2391 standards with H8 bore tolerance. High Precision Surface Finish: Inner bore roughness within Ra 0.4, ideal for hydraulic and automotive cylinders. Wide Customization Range: ID ranges from 32mm to 1600mm, with customizable bore treatments like honing. Versatile Industrial Application: Suitable for hydraulic pipes, machinery, mining, construction, and special purposes. Professional After-Sales Support: 24-hour service available 7 days a week with a 12-month warranty. Secure Packaging & Shipping: Anti-rust oil, bubble bags, and wooden boxes ensure safe transport via sea. Flexible Order Tracking: Real-time progress updates provided after deposit receipt until delivery. Fast Delivery Time: Standard delivery within 25 days, with off-season lead time under 15 workdays.