St37 Carbon Steel Round Bar
Get mill-direct access to premium-grade St37 (EN 1.0037 / S235JR) carbon steel round bars explicitly engineered for high-efficiency machining, high-yield structural welding, and automated component forging. We guarantee exceptional core carbon uniformity, tightly calibrated cross-sectional roundness constants, and full international standard-certified material compliance backed by our direct 2-Hour Rapid Quote technical protocol.
Tired of slow supplier emails while your critical project bidding deadline slips away? Terrified of buying low-grade carbon rods that fracture during structural processing, fail strict on-site PMI or tensile audits, and destroy your engineering reputation? Secure your mill-verified testing records instantly.
PRODUCT DETAILS
St37 Carbon Steel Round Bar Three-Standard Cross Matrix
| European Standard (DIN / EN) | American Standard (ASTM) | Japanese / Chinese Standard (JIS / GB) | Available Diameter Range | Chemical & Structural Performance Core |
|---|---|---|---|---|
| DIN St37-2 / EN 1.0037 / S235JR | ASTM A36 / A572 Grade 42 | JIS G3101 SS400 / GB Q235B | 6mm – 350mm / Cold Drawn & Smooth Peeled | C ≤0.17%, Tensile 360-510 MPa, Superb Weldability |
| DIN St44-2 / EN 1.0044 / S275JR | ASTM A572 Grade 50 | JIS SS490 / GB Q275 | 10mm – 300mm / Hot Rolled Black | Medium Carbon Structural Load Extension |
| DIN St52-3 / EN 1.0570 / S355J2 | ASTM A572 Grade 60 | JIS SM490 / GB Q355D | 12mm – 500mm / Forged & Turned Stock | High-Yield Low-Alloy Heavy Machine Processing |
Technical QA/QC Verification
• EN 10204 3.1 Material Test Certificates (MTC) & NDT Defect Screening: All dispatched commercial lots are coupled with verified original MTC sheets tracking heat analytics, elongation profiles, and structural impact tests. Fully optimized to support third-party visual and structural cross-verification from SGS, Bureau Veritas, or Intertek.
• Sovereign Capital Security Framework: To insulate global construction contractors and manufacturing procurement firms from unexpected project-side risk, fluctuating financial markets, and timeline exposure, we authorize all high-volume productions under 100% Irrevocable Letters of Credit (L/C) at sight financial protocols.
Internal Protection & Ocean Logistics
• Rigid Iron Cradle Chassis & Cross-Timber Container Bracing: Finished structural bundles are firmly nested inside heavy iron support frame chassis or solid wood crates to eliminate linear bending or shifting during crane terminal processing. All container cargo is heavily cross-braced with continuous steel tension straps and interlocked timber chocks.
• Complimentary 14-21 Days Extended Destination Port Demurrage Buffer: SXY Steel Group pre-embeds up to 21 days of extended free container demurrage into your ocean Bill of Lading, protecting your custom clearing brokers from unexpected port-side terminal processing penalties.
ST37 is a German standard (now superseded by EN 10025-2 S235JR) for structural steel sections and plates. Round bars of equivalent material are typically supplied as S235JR under standards for steel bars, not under the “ST37” designation for plates/sections. The description about cold-rolled strip and high surface finish pertains to cold-rolled sheet/coil products, not to structural round bars.
ST37 (S235JR) Steel Specifications
| Item | Corrected Content |
|---|---|
| Material | ST37 (S235JR) |
| Thickness | 0.1mm-300mm or as required |
| Standard | DIN EN 10025-2 (S235JR) |
| Technique | Hot rolled |
| Surface Treatment | Clean, blasting and painting according to customer requirement |
| Thickness tolerance | Per EN 10029: Thickness ≤ 3mm: ±0.3mm; 3mm < Thickness ≤ 10mm: ±0.5mm; Thickness > 10mm: ±1.0mm (Example for hot rolled plate, varies by dimension) |
| Application | General structural steel for construction, machinery, and engineering components. |
| 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 |
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 Component Nesting Optimization Analysis & Structural Drawing BOM Audit
Engineering machinery frameworks, industrial shafts, high-volume automotive fasteners, or responding to a large-scale international commercial steel tender? Upload your target rod lengths, diameter tolerances, cut schedules, or technical Bill of Materials (BOM) data below. SXY Steel Group’s engineering division will perform a thorough nesting assessment to minimize scrap material loss and protect your project budget limits.
