Bethlehem Steel Tube,Pipe ASTM A852, Steel Tube,Pipe

Bethlehem Steel Tube ASTM A852, 3/16 to 4 in. thick, Steel Tube plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel Tube ASTM A852, 3/16 to 4 in. thick, Steel Tube plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A852, 3/16 to 4 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: Bethlehem Steel ASTM A852 Steel Plate** **Product Overview** Bethlehem Steel ASTM A852 is a premium high-strength, low-alloy (HSLA) **quenched and tempered (Q&T)** structural steel plate specifically formulated for **atmospheric corrosion resistance**. It combines the high strength and excellent toughness of a quenched and tempered microstructure with approximately **two times the atmospheric corrosion resistance** of carbon structural steel (without copper). Often referred to as "weathering Q&T steel," it is designed for exposed structural applications where a higher strength-to-weight ratio is required alongside a maintenance-free, protective rust patina. This plate is available in a wide thickness range from **3/16 inch (4.8 mm) to 4 inches (101.6 mm)**. **Key International Standards** * **Primary Standard:** **ASTM A852 / A852M** - Standard Specification for Quenched and Tempered Low-Alloy Structural Steel Plate with 70 ksi [485 MPa] Minimum Yield Strength to 4 in. [100 mm] Thick. * **Governing Specification:** This product conforms to the requirements of ASTM A852. The standard is specific to a **70 ksi (485 MPa) minimum yield strength** grade. * **Heat Treatment Condition:** Supplied in the **quenched and tempered condition**. This involves water quenching from the austenitizing temperature followed by tempering to achieve the required combination of strength and toughness. * **Corrosion Resistance:** The chemistry, containing chromium, copper, and nickel, promotes the formation of a dense, adherent protective oxide layer (patina) when exposed to weather, with a corrosion rate typically **twice that of carbon steel** per the standard. * **Supplementary Requirements:** Commonly invoked with **ASTM A6** requirements, especially: * **S1 (Charpy V-Notch Impact Testing):** Critical for this grade, often specified at low temperatures (e.g., -50°F / -46°C). * **S4 (Ultrasonic Examination):** For plates over 1 inch thick. * **S5 (Maximum Carbon Equivalent):** To ensure weldability. **Chemical Composition (Weight % - ASTM A852 Requirements)** The chemistry is balanced to provide hardenability for Q&T, atmospheric corrosion resistance, and good weldability. | Element | ASTM A852 Requirement (Max, unless noted) | Typical Bethlehem Steel Range | | :--- | :--- | :--- | | **Carbon (C)** | 0.19% | 0.14 - 0.18% | | **Manganese (Mn)** | 1.10% | 0.90 - 1.05% | | **Phosphorus (P)** | 0.035% | ≤ 0.020% | | **Sulfur (S)** | 0.04% | ≤ 0.010% | | **Silicon (Si)** | 0.30 - 0.65% | 0.40 - 0.55% | | **Copper (Cu)** | 0.20 - 0.40% | 0.25 - 0.35% | | **Nickel (Ni)** | 0.25 - 0.50% | 0.30 - 0.45% | | **Chromium (Cr)** | 0.40 - 0.70% | 0.50 - 0.65% | | **Molybdenum (Mo)** | 0.05 - 0.30% | 0.08 - 0.20% | | **Vanadium (V)** | 0.02 - 0.10% | 0.04 - 0.08% | | **Carbon Equivalent (C.E. IIW)** | Not specified | Typically 0.45 - 0.52 | **Physical & Mechanical Properties** *Note: For plates over 1.5 inches thick, ASTM A852 allows for a slight reduction in tensile strength and elongation requirements.* | Property | Requirement (ASTM A852) | Typical Performance / Notes | | :--- | :--- | :--- | | **Yield Strength (Min)** | 70 ksi (485 MPa) | 75 - 85 ksi (517 - 586 MPa) for thinner plates; 70 - 80 ksi for thicker plates. | | **Tensile Strength** | 90 - 110 ksi (620 - 760 MPa) | 95 - 105 ksi (655 - 724 MPa) | | **Elongation in 2" (Min)** | 18% (for plates ≤ 3/4") | Typically 19-22% | | **Charpy V-Notch Toughness (As-Q&T)** | Excellent; Often ≥ 40 ft-lb @ -50°F (-46°C). | A hallmark of this grade, providing outstanding fracture resistance for exposed structures in cold climates. | | **Modulus of Elasticity** | ~29,000 ksi (200 GPa) | ~29,000 ksi (200 GPa) | | **Density** | ~0.284 lb/in³ (7.85 g/cm³) | ~0.284 lb/in³ (7.85 g/cm³) | | **Atmospheric Corrosion Resistance** | **Approximately 2x that of carbon steel.** | The alloying elements (Cr, Cu, Ni) enable the formation of a stable, protective rust layer, reducing long-term maintenance. | | **Key Feature** | **High-Strength Weathering Steel:** Uniquely combines the high strength (70 ksi yield) and excellent low-temperature toughness of quenched and tempered steel with the maintenance-free corrosion performance of a weathering grade, enabling lighter, more durable exposed structures. | **Product Applications** ASTM A852 is specified for critical, exposed structural applications where both high strength/weight ratio and long-term durability without painting are required, particularly in aggressive or cold environments. * **High-Strength Exposed Bridges:** Fracture-critical members, lightweight girders, and arches in signature bridges where weight savings and durability are crucial. * **Offshore & Marine Structures (above splash zone):** Modules, helidecks, and topside structures on platforms where weight reduction and corrosion resistance reduce lifecycle costs. * **Power Transmission & Communication Towers:** For tall, heavy-loaded towers where reduced member size and elimination of painting offer significant advantages. * **Building Construction:** Exposed architectural elements, long-span trusses, and seismic force-resisting systems in aggressive urban or industrial atmospheres. * **Heavy Equipment & Mining:** Booms, frames, and structural components for equipment operating in exposed, corrosive environments. **Advantages & Fabrication Notes** * **Superior Strength & Toughness:** The Q&T process provides a much better strength-toughness combination than as-rolled or normalized weathering steels (e.g., A588), allowing for more efficient, fracture-resistant designs. * **Good Weldability with Precautions:** Weldable with proper low-hydrogen procedures. However, due to its Q&T condition and moderate CE, it requires: * **Strict Preheat/Interpass Control:** Typically 300-400°F (149-204°C) depending on thickness. * **Controlled Heat Input:** To preserve Heat-Affected Zone (HAZ) properties. * **Potential for PWHT:** May be required for thick, highly restrained welds. * **Maintenance & Sustainability Benefits:** The weathering characteristic eliminates repeated painting, reducing lifecycle costs and environmental impact. * **Formability:** Limited cold formability due to high strength. Hot forming is possible but requires subsequent re-quenching and tempering. * **Environmental Suitability:** Like all weathering steels, it requires wet/dry cycles to form the patina and is not suitable for continuous immersion, saltwater splash zones, or highly polluted industrial atmospheres. * **Legacy Product Note:** Bethlehem Steel was a key producer of this advanced weathering steel. Modern equivalents are readily available as **ASTM A852** from contemporary plate mills. It is often compared to **ASTM A871-65**, which is a similar 65 ksi yield weathering Q&T steel. **Disclaimer:** This datasheet describes the historical **Bethlehem Steel** product meeting **ASTM A852**. For current procurement, specify **ASTM A852** along with required supplementary conditions (impact test temperature, UT). It is crucial to understand that this is a **heat-treated steel** with specific fabrication requirements that differ from standard weathering steels. Fabricators must be experienced with welding Q&T steels. The project specification should clearly address environmental suitability, fabrication practices (including thermal cutting and welding), and the management of "run-down" staining from weld and cut edges during patina formation. The Mill Test Certificate will verify the Q&T condition, chemistry, and mechanical properties. -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A852, 3/16 to 4 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4690 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A852, 3/16 to 4 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel Tube ASTM A852, 3/16 to 4 in. thick, Steel Tube plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel Tube ASTM A852, 3/16 to 4 in. thick, Steel Tube plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel Tube ASTM A852, 3/16 to 4 in. thick, Steel Tube plate -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Tube drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1161 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition