A53 Carbon Steel Round Bar
Our mill direct production network supplies premium-grade ASTM A53 carbon steel round bars engineered for heavy structural, mechanical processing, and low-pressure components. We guarantee uniform cross-sectional grain structure, high machinability ratings, and verified dimensional straightness backed by our direct 2-Hour Rapid Quote technical protocol.
Tired of waiting days for price quotes while your strict project bidding deadline runs out? Terrified of low-grade structural carbon rods that split during machining, fail critical site inspections, and ruin your career reputation? Secure your mill-verified testing records instantly.
PRODUCT DETAILS
General Structural Carbon Steel Round Bar Three-Standard Cross Matrix
| American Standard (ASTM Spec) | European Standard (EN 10025) | Japanese / Chinese Equivalent (JIS/GB) | Diameter & Condition Scope | Tensile & Yield Thresholds |
|---|---|---|---|---|
| ASTM A53 Grade A | S235JR / 1.0038 | SS400 / Q235B Mild Steel | 6mm – 120mm / Cold Drawn or Hot Rolled | Rm ≥ 330 MPa / Re ≥ 205 MPa |
| ASTM A53 Grade B | S275JR / 1.0044 Structural | SM400A / Q275 Structural Solid Rod | 6mm – 250mm / Hot Rolled, Smooth Finished | Rm ≥ 415 MPa / Re ≥ 240 MPa |
| ASTM A106 Grade B | S355JR / 1.0045 High Strength | SS490 / Q355B Heavy Duty | 10mm – 400mm / Hot Rolled Turned Bar | Rm ≥ 415 MPa / Re ≥ 240 MPa |
Technical QA/QC Verification
• EN 10204 3.1 Material Test Certificates (MTC) & Heat Traceability: All incoming allocations are paired with verified original MTC tracking data sheets, itemizing comprehensive heat numbers, mechanical yield-stress boundaries, elongation ratios, and chemical composition data. Fully aligned to accommodate independent third-party inspection reviews from SGS, Bureau Veritas, or Intertek.
• Sovereign Capital Security Framework: To insulate commercial engineering contractors and procurement firms from international currency changes and delivery scheduling anxieties, we execute all high-volume productions under 100% Irrevocable Letters of Credit (L/C) at sight financial protocols.
Internal Protection & Ocean Logistics
• Rigid Iron Frame Palletization & Timber Cross-Bracing: Finished bundles are arranged inside heavy iron alignment frame cradles or robust wooden end-boxes to completely eliminate linear bending or shifting during terminal crane operations. The total container configuration is cross-braced using heavy steel straps and internal wood block locks to handle high-seas rolling.
• Complimentary 14-21 Days Extended Destination Port Demurrage Buffer: SXY Steel Group proactively secures pre-cleared, extended 14 to 21 days of container free-time demurrage parameters on your ocean Bill of Lading, giving your customs agent an open window to handle processing without incurring costly storage fines.
A53 is an ASTM standard specification for welded and seamless steel pipe. It is not a standard grade for “round bar”. Round bars of similar composition are typically supplied under standards such as ASTM A36 for structural shapes or ASTM A29 for hot-rolled carbon steel bars.
ASTM A53 / ASME SA53 Pipe Specifications
| Parameter | Description |
|---|---|
| Material | Carbon Steel (for pipe application). Note: “A53” is a standard for welded and seamless steel pipe, not a plate/round bar material designation. |
| Thickness | For Pipe Wall Thickness: Commonly corresponds to schedules (e.g., Sch. 40, 80) or specified wall. The stated range (0.1mm-300mm) is incorrect for this product standard. |
| Standard | ASTM A53 / ASME SA53 (Type F, E, or S; Grade A or B) |
| Technique | Welded (ERW, Furnace Butt-Welded) or Seamless (for steel pipe). “Hot rolled, cold rolled” is incorrect for ASTM A53 pipe manufacturing. |
| Surface Treatment | Clean, blasting and painting according to customer requirement. (Note: Standard finish is bare/as-manufactured; galvanized coating is a common option.) |
| Thickness tolerance | Per ASTM A53, wall thickness tolerance for seamless pipe is typically +20%, -12.5% of nominal wall; for welded pipe, it varies by process and size. The stated ±0.1mm is incorrect. |
| Application | General service steel pipe for conveying fluid (water, gas, air, steam) and structural applications. The description related to automotive structural parts is not the primary application for ASTM A53 pipe. |
| Shipment time | Within 7-15 workdays after receiving deposit or L/C |
| Export packing | Waterproof paper, and steel strip packed. Standard Export Seaworthy Package. Suit for all kinds of transport, or as required |
| Capacity | 250,000 tons/year |
Round steel belongs to carbon structural steel for construction and machinery, while square steel belongs to carbon structural
steel for machinery. Both of them are simple section steel, and their section shapes are respectively round and square. Low carbon is mainly used for
drawing wire, forging rivets, bolts, nuts and other metal products of raw materials. Medium carbon round steel and square steel
are generally used to make mechanical structural parts.
Packing and shipping
Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO/BIS etc certificate.All the customers give good appreciation to our products.We are glad to be your good partner.
Application Areas
Steel is widely used in steel structure workshops, bridge frames, main structures of high-rise buildings, and infrastructure construction (such as highways, oil and gas pipelines). Its high strength properties ensure load-bearing stability and seismic performance. In ship manufacturing, steel is used to build hull structures, decks, and internal components. Hot-rolled coils rely on their load-bearing capacity to adapt to harsh environments.
Factory workshop
With a commitment to excellence, innovation, and sustainability, the company has established itself as a trusted partner in the international steel industry.After nearly two decades of relentless endeavour, our client base now spans over 110 countries and regions across Europe, the Middle East, South America, and Southeast Asia.
Free Carbon Steel Nesting Optimization Analysis & General Structural Drawing BOM Audit
Designing industrial structural shafts, machine tool components, structural frameworks, or replying to a high-volume global carbon steel procurement tender? Upload your target rod lengths, precision engineering tolerances, cut plans, or raw engineering Bill of Materials (BOM) drawing files below. SXY Steel Group’s engineering department will execute a complete nesting calculation to cut scrap metal losses and safeguard your production budget.
