Product Overview
TB/T 1979 09CuPCrNi-A -3 Weather Resistant Steel is a low-alloy atmospheric corrosion-resistant steel manufactured in accordance with TB/T 1979 for railway vehicles, freight wagons, bridges, containers and outdoor steel structures.
Technical Specifications
09CuPCrNi-A Mechanical Properties
|
Property |
Value |
Notes |
|
Yield Strength (ReH) |
≥ 345 MPa |
Core structural load indicator (may vary by thickness). |
|
Tensile Strength (Rm) |
480 - 630 MPa |
High-strength performance for heavy-duty applications. |
|
Elongation (A%) |
≥ 22% - 24% |
Excellent ductility and cold-forming capabilities. |
|
Impact Toughness |
≥ 34J at -20°C / -40°C |
Maintains high safety in extreme cold environments. Test temperature (-20°C or -40°C) depends on the specific sub-grade and thickness requirements. |
|
180° Cold Bend |
Qualified |
Verified processing performance (d=a for thickness ≤ 6mm). |
Element Content (%) Role in Performance
|
Element |
Content (%) |
Role in Performance |
|
Carbon (C) |
≤ 0.12 |
Low-carbon design ensures excellent weldability and low-temperature toughness. |
|
Silicon (Si) |
0.25 - 0.75 |
Deoxidizes the steel, improves purity, and strengthens the matrix. |
|
Manganese (Mn) |
0.20 - 0.50 |
Significantly increases strength and hardness for load-bearing structures. |
|
Phosphorus (P) |
0.07 - 0.12 |
A core weathering element. Works with Copper to stabilize the patina layer. |
|
Sulfur (S) |
≤ 0.020 |
Kept low to reduce hot-processing cracks and improve overall toughness. |
|
Copper (Cu) |
0.25 - 0.55 |
The most critical anti-corrosive element; forms a stable copper-oxide protective film. |
|
Chromium (Cr) |
0.30 - 1.25 |
Enhances oxidation resistance and contributes to self-healing properties. |
|
Nickel (Ni) |
0.12 - 0.65 |
Improves low-temperature impact toughness and overall weatherability. |
|
Other (Al, Ti, V, etc.) |
Trace amounts |
Used for grain refinement and optimization of the microstructure. |
Product Forms & Dimensions
|
Form |
Thickness Range |
Width / Length |
|
Hot-Rolled Coils |
1.5mm - 12.0mm |
Width: 1000mm - 1800mm |
|
Steel Plates |
2.0mm - 50.0mm+ |
Width: Up to 3500mm; Length: 6000mm - 12000mm |
|
Structural Sections |
Standard Sizes |
Angles, Channels, H-Beams, I-Beams |
|
Bars & Pipes |
Customizable |
Round bars, seamless pipes, square tubes |
Key Engineering Advantages
Balanced Cu, Cr, Ni, and P micro-alloying creates a dense, self-healing oxide patina, significantly extending service life and cutting maintenance costs compared to carbon steel.
Delivers a reliable minimum yield strength of 345 MPa alongside excellent cold-forming properties, making it highly versatile for structural bending, laser cutting, and profiling.
Verified Charpy V-notch impact energy (≥ 34J) ensures reliable resistance to brittle fracture even in extreme temperatures down to -20°C / -40°C.
Low-carbon equivalent design allows seamless field welding with standard matched consumables, eliminating pre-heating requirements for standard shop conditions and normal plate thicknesses.
How Atmospheric Corrosion Resistance (Patina) Works
Under alternating wet and dry ambient cycles, the micro-alloying elements (Cu, Cr, Ni, P) dissolve into the rust layer to form a highly compact, amorphous inner oxide barrier. Unlike standard carbon steel-whose rust layer is porous and flake-prone-this dense patina seals the underlying base metal from oxygen and moisture ingress, slowing down ongoing atmospheric corrosion over time.
In-House Processing Capabilities
Precision CNC Cutting: High-power fiber laser cutting, heavy plasma cutting, and flame cutting tailored to complex project drawings.
Forming & Machining: Precision hydraulic bending, cold shearing, hole punching, and beveling.
Surface Preparation: Shot blasting (Sa 2.5 cleanliness standard) and chemical accelerated pre-patina treatment (saving 12–24 months of natural weathering time).
Primary Engineering Applications
Railway Rolling Stock: Coal transport cars, hopper cars, container flat wagons, and passenger car body frames.
Intermodal Freight Equipment: Shipping containers, specialized cargo boxes, and modular housing structures.
Bridges & Infrastructure: Unpainted steel bridges, highway guardrails, power transmission towers, and outdoor sound barriers.
Architectural & Landscape Engineering: Weathering steel facades, curtain walls, outdoor sculptures, and retaining walls (utilizing accelerated pre-patina options).
Industrial Equipment: Air preheaters, chimneys, ductwork, and outdoor storage hoppers exposed to industrial atmospheres.
Strict Quality Control & Physical Traceability
Chemical Verification: On-site Spectrometer / PMI testing to confirm alloy element percentages before dispatch.
Mechanical & NDT Testing: Tensile testing, Charpy V-notch impact testing, and Ultrasonic Testing (UT) per EN 10160 / GB standards upon request.
100% Physical Traceability: Stenciled heat numbers, steel grade, and batch numbers stamped directly on each plate, fully matching the documentation.
Compliance & Export Documentation
Mill Test Certificate (MTC): Issued in strict accordance with EN 10204 3.1 with full chemical and mechanical values.
Third-Party Inspection Supported: Pre-shipment inspection and sampling verification by SGS, BV, or Intertek are fully accepted.
Seaworthy Export Packaging: VCI anti-rust paper wrap, waterproof plastic film, heavy-duty steel strapping, edge protection, and wooden skids.
FAQ
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