Description
Factory-Direct Hot Rolled H-Beams — Q345B and S355JR sections rolled in-house with full mill test traceability, shipped without trading margins.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | Q345B/S355JR/S355J2 Hot Rolled H Beam |
| Product Type | H-beam |
| Steel Grade | Q345B, S355JR, S355J2, Q235, A36, SS400 |
| Standard | BS, EN, GB, AISI, ASTM, DIN, JIS |
| Section Shape | H-beam / I-beam |
| Flange Thickness | 8mm–64mm |
| Web Thickness | 4.5mm–36.5mm |
| Web Width | 100mm–900mm |
| Length | As requested |
| Technique | Hot Rolled |
| Tolerance | ±1% |
| Processing Service | Bending, Welding, Decoiling, Punching, Cutting |
| Surface Treatment | Customized Colors |
| Packing | Seaworthy |
| Application | Steel Building, Steel Structure, Construction, Industrial Platforms, Bridges |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| EPC Contractors | Primary column and beam frames for industrial plants and warehouse structures |
| Construction Companies | High-rise building cores, bridge girders, and infrastructure support frames |
| System Integrators | Conveyor support gantries, automation platform structures, and mezzanine frames |
| Machinery Manufacturers | Heavy equipment bases, crane runway beams, and load-bearing chassis |
What Flange Thickness Tolerance Costs on a Structural Frame Order
A ±1% hot-rolled tolerance on Q345B and S355JR H-beams keeps connection plates flush and bolt holes aligned without on-site reaming.
When flange thickness drifts beyond tolerance, end-plate connections on S355J2 beams fail to seat properly — forcing contractors to either machine every connection on-site or reject entire shipments at the inspection stage. Fragmented sourcing across multiple mills compounds this: each supplier runs different rolling schedules, and mixing beams from two heats on the same frame creates uneven deflection under load. For EPC projects spanning 50+ countries, the real cost is not the rework — it is the customs hold when mill test certificates do not match the heat numbers stamped on the web [NEED_CITE: EN 10219 hot rolled structural section tolerance requirements].
Matching H-Beam Profiles to Structural Load Paths
Hot rolled Q345B and S355JR H-beams carry primary gravity and lateral loads in portal frames, bridge girders, and industrial platform structures. The wide flange geometry (up to 900mm web width) distributes bending stress across a larger moment of inertia than equivalent-weight I-beams, making Q345B/S355JR hot rolled H-beams the default choice for columns subject to combined axial and bending forces. Welded connections to base plates and splice joints follow standard prequalified joint procedures, while the hot-rolled surface accepts shop primers without additional blast cleaning beyond Sa 2.5.
Engineering Compliance and Certification Requirements
Structural H-beams in S355JR and S355J2 must meet impact toughness requirements at specified test temperatures — JR grade at +20°C and J2 grade at −20°C — per EN 10210 for load-bearing frames in cold climates [NEED_CITE: EN 10210 structural hollow section material requirements]. For EU-bound shipments, CE marking under EN 10210/10219 is mandatory for customs clearance; North American projects typically require ASTM A36 or A572 equivalence documentation. Hot rolled sections in Q345B conform to GB/T 11263 and are widely accepted across Southeast Asian and Middle Eastern infrastructure specifications. On-site cutting, punching, and welding follow standard structural steel fabrication codes, with dimensional tolerance held at ±1% across flange and web.
Steel Grade Selection and Hot Rolling Process
Q345B (GB), S355JR/J2 (EN), and A36 (ASTM) represent three major grading systems with overlapping yield strength tiers — Q345B and S355JR both deliver higher yield than A36, while S355J2 adds low-temperature impact certification for sub-zero environments. Hot rolling at temperatures above the recrystallization point produces uniform grain structure through the full flange and web thickness, avoiding the residual stress patterns found in cold-formed alternatives. This makes hot rolled Q345B/S355JR H-beams suitable for heavy load-bearing applications where through-thickness consistency matters — bridge girders, crane beams, and multi-story column sections. Surface treatment in customized colors provides initial corrosion protection for indoor or sheltered applications; outdoor or marine environments require additional galvanizing or coating systems specified by the project engineer.
Hidden Costs of Incorrect Grade Substitution
Substituting S355JR for S355J2 without verifying impact test values creates latent structural risk in cold-region projects — the steel may pass visual inspection but fail Charpy testing at the specified service temperature, triggering full batch rejection. Missing or mismatched mill test certificates delay customs clearance on CE-marked shipments, with containers held at port until original documentation arrives from the rolling mill. Tolerance drift on flange thickness forces connection redesign or on-site machining, adding weeks to erection schedules. Every compliance failure traces back to a single gap: no in-house lab verification before the container is sealed [NEED_CITE: steel grade equivalence and impact testing requirements across EN and ASTM standards].
Why SD XJY Steel for Structural H-Beams
Every Q345B and S355JR H-beam leaves our facility with original mill test certificates generated from our in-house physical and chemical laboratory — not third-party retests arranged after the fact. We roll, cut, weld, and punch in-house across dedicated production lines, so tolerance control stays under one roof rather than passing through trading intermediaries. Our catalog covers over 2,800 structural specifications, and custom non-standard lengths or dimensions are produced to order without inflated minimums. CE certification under EN 10210/10219, ISO 9001:2015 registration, and third-party verification by SGS and BV ensure documentation clears EU, North American, and Middle Eastern customs without delay. Professional loading plans optimize container utilization for long-length sections, and our logistics team coordinates FOB, CIF, and DDP shipments to 50+ countries with real-time tracking.
Documentation & Compliance
- Mill test certificate documenting Q345B and S355JR chemical composition and mechanical properties per GB/T 15825 and EN 10025
- CE certificate covering hot rolled structural sections under EN 10210/10219 for EU market compliance
- ISO 9001:2015 quality management certificate covering rolling, cutting, and welding processes
- SGS or BV third-party inspection report available upon request for project-specific verification
- Full material traceability by heat number from slab to finished H-beam section
- Customs document package including packing list, bill of lading, and certificate of origin
Packaging, Loading & Delivery
- Hot rolled Q345B and S355JR H-beams bundled with steel strips and edge protectors to prevent flange damage during ocean transit
- Surface protection with anti-rust oil or customized color coating per project specification before bundling
- Container loading plans optimized for long-length sections up to full web width of 900mm, maximizing TEU utilization
- Custom cutting to project-specified lengths available before shipment, reducing on-site waste and handling
- Heat number and steel grade stenciled on each beam web for on-site traceability and inspection verification
- FOB, CIF, and DDP delivery terms with door-to-door logistics coordination to 50+ countries
Starting Your H-Beam Procurement
Submit your specification sheet — including steel grade, section dimensions, quantity, and destination port — and receive a detailed quotation with unit pricing, production lead time, and applicable certification within 12 hours. Request original mill test certificates and third-party inspection options before committing to production.
Get Your Q345B S355JR H-Beam Quote
Send your specifications via email or WhatsApp to receive pricing, mill test certificates, and delivery options.
Contact: Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxjysteel.com
Frequently Asked Questions
Q: What is the difference between S355JR and S355J2 for structural applications?
A: Both grades meet the same minimum yield strength per EN 10025-2, but S355J2 requires Charpy impact testing at −20°C, making it mandatory for structures in cold climates or sub-zero service environments. S355JR is tested at +20°C and suits standard indoor or temperate conditions.
Q: Can you provide mill test certificates for EU customs clearance?
A: Yes. Every shipment includes original mill test certificates documenting chemical composition and mechanical properties. For EU destinations, we provide CE certification under EN 10210/10219 to ensure customs clearance without delay.
Q: Do you offer custom cutting and processing for H-beams?
A: Yes. Our in-house processing services include bending, welding, punching, and cutting to project-specified lengths and dimensions, all performed under ±1% tolerance with full quality documentation.
Q: How do Q345B and S355JR compare in terms of equivalence?
A: Q345B (GB/T 1591) and S355JR (EN 10025-2) share similar yield strength levels and are widely accepted as equivalent in international projects. We provide cross-reference documentation for projects requiring grade substitution approval.
Q: What delivery terms and logistics support do you provide?
A: We offer FOB, CIF, and DDP terms with professional container loading optimization for long-length H-beams. Our logistics team coordinates door-to-door delivery to 50+ countries with real-time shipment tracking.
