RUNYING Steel Group is a premier Tangshan-based manufacturer and supplier of high-precision Hot Rolled and Cold Drawn Carbon and Alloy Steel Round Bars. Produced from premium carbon and alloy steel billets under strict quality controls, our round bars feature exceptional straightness, tight diameter tolerances (up to ISO h9), and uniform mechanical grain structures tailored for heavy industrial shaft manufacturing, precision machining, gear production, and heavy-duty structural fasteners.

Technical Specifications & Manufacturing Standards

Our carbon and alloy steel round bars comply with international engineering standards and rigorous internal quality inspections:

Carbon & Alloy Steel Grades & Applications

Key Performance Advantages of RUNYING Round Bars

Precision Dimensional Control:

Cold drawn options provide ultra-precise diameter tolerance (h9 grade) and ovality ≤0.15mm, eliminating secondary turning costs for automated CNC machining centers.

Customized Heat Treatment Options:

Available in Normalized, Annealed, Quenched & Tempered (Q+T), or Spheroidized Annealed conditions to achieve exact tensile strength, yield limits, and impact toughness requirements.

Full Ultrasonic Inspection (NDT):

100% internal void and flaw detection ensuring zero micro-fractures in high-speed rotating mechanical components.

Global Standard Compliance:

Manufactured in strict accordance with ASTM A29 / EN 10060 / JIS G4051 engineering parameters.

Seaworthy Packaging & Tianjin Port Shipping

Export Bundling: Supplied in 1.0 MT – 2.5 MT heavy-duty hex bundles wrapped with waterproof plastic film and woven cloth, bound with dual high-tensile steel wire straps.

Surface Protection: Anti-rust oiling or protective varnish applied prior to ocean transit.

Logistics Advantage: Direct container stuffing (20ft/40ft GP) and breakbulk vessel dispatch from our staging yards at Tianjin Port, China.

Technical Guides & Contextual Resources

Explore structural steel channel profiles: Structural C Channel & UPN/UPE Steel Beams

Explore specialized surface-treated coils: Chromium-Free Anti-Fingerprint Galvalume Steel Coils

Calculate container weight limits for steel shipments: Steel Coil Weight & Dimensions Calculator Guide

Review secure trade payment terms: Secure Payment Terms & Bank of China L/C Support

Request Your Factory-Direct Steel Round Bar Quote

Looking for precision cold drawn AISI 1045, 4140 alloy round bars, or custom cut-to-length shafting steel? Contact our metallurgy export team today for real-time factory pricing and complete Mill Test Certificates (MTC EN 10204 3.1):

Direct Sales Email: admin@tsrysteel.com

WhatsApp / Mobile: +86 15176700707

Official Web Homepage: http://www.tsrysteel.com

Product Catalog: Browse All Carbon & Alloy Steel Bars & Structural Sections →