Bethlehem Steel Sheet,Plate ASTM A871, Steel Sheet,Plate

Bethlehem Steel Sheet/Plate ASTM A871 Grade 60 3/16 to 6 in. thick, Steel Sheet/Plate plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel Sheet/Plate ASTM A871 Grade 60 3/16 to 6 in. thick, Steel Sheet/Plate plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A871 Grade 60 3/16 to 6 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: Bethlehem Steel ASTM A871 Grade 60 Steel Plate** **Product Overview** Bethlehem Steel ASTM A871 Grade 60 is a **quenched and tempered (Q&T) high-strength low-alloy (HSLA) structural steel plate** engineered specifically for **atmospheric corrosion resistance**. This premium grade combines a guaranteed **60 ksi minimum yield strength** with a fine-grained tempered martensitic/bainitic microstructure, offering superior toughness and fatigue resistance compared to as-rolled weathering steels. Its unique chemistry, featuring chromium, copper, and nickel, allows it to develop a protective, self-healing oxide patina when exposed to the elements, providing approximately **two times the corrosion resistance of plain carbon steel**. This plate is available in an exceptionally broad thickness range from **3/16 inch (4.8 mm) to 6 inches (152.4 mm)**, making it suitable for both lightweight and massive structural components. **Key International Standards** * **Primary Standard:** **ASTM A871 / A871M** - Standard Specification for High-Strength Low-Alloy Structural Steel Plate with Atmospheric Corrosion Resistance. * **Governing Specification:** This product conforms to the requirements for **Grade 60** as defined in ASTM A871. The standard covers multiple grades (Grades 60, 65, 70) with different yield strengths. * **Heat Treatment Condition:** Supplied in the **quenched and tempered (Q&T) condition**. * **Corrosion Resistance:** The alloy design provides a corrosion resistance index at least **two times greater than that of plain carbon steel (ASTM A36)** when subjected to atmospheric exposure. This performance is verified through standardized testing. * **Supplementary Requirements:** Commonly invoked with **ASTM A6** requirements, especially critical for thick plate: * **S1 (Charpy V-Notch Impact Testing):** Mandatory for most applications, often at low temperatures. For plates > 1.5", testing at the **quarter-thickness (T/4) location** is standard. * **S4 (Ultrasonic Examination):** Typically required for plates over 1 inch thick. * **S5 (Maximum Carbon Equivalent):** To ensure weldability. **Chemical Composition (Weight % - ASTM A871 Grade 60 Requirements)** The chemistry is balanced for hardenability, corrosion resistance, and weldability. Phosphorus and sulfur are controlled to low levels. | Element | ASTM A871 Grade 60 Requirement (Max, unless noted) | Typical Bethlehem Steel Range | | :--- | :--- | :--- | | **Carbon (C)** | 0.20% | 0.14 - 0.18% | | **Manganese (Mn)** | 1.35% | 1.00 - 1.25% | | **Phosphorus (P)** | 0.04% | ≤ 0.020% | | **Sulfur (S)** | 0.05% | ≤ 0.010% | | **Silicon (Si)** | 0.15 - 0.50% | 0.20 - 0.40% | | **Copper (Cu)** | 0.20 - 0.50% | 0.25 - 0.40% | | **Nickel (Ni)** | 0.25 - 0.50% | 0.30 - 0.45% | | **Chromium (Cr)** | 0.40 - 0.70% | 0.50 - 0.65% | | **Molybdenum (Mo)** | 0.08% max (if added) | 0.05 - 0.08% | | **Vanadium (V)** | 0.06% max (if added) | 0.03 - 0.06% | | **Carbon Equivalent (C.E. IIW)** | Not specified | Typically 0.40 - 0.48 | **Physical & Mechanical Properties** *Note: For plates over 1.5 inches thick, the standard allows for adjusted tensile and elongation requirements. Properties are typically verified at the T/4 location for thick plate.* | Property | Requirement (ASTM A871 Grade 60) | Typical Performance / Notes | | :--- | :--- | :--- | | **Yield Strength (Min)** | 60 ksi (415 MPa) | 65 - 75 ksi (448 - 517 MPa) for thinner plates; 60 - 70 ksi for very thick plates (at T/4). | | **Tensile Strength** | 75 ksi (515 MPa) Min | 80 - 90 ksi (552 - 621 MPa) | | **Elongation in 2" (Min)** | 19% (for plates ≤ 3/4") | Typically 20-24% | | **Charpy V-Notch Toughness (As-Q&T)** | Excellent; Often specified ≥ 30 ft-lb @ -50°F (-46°C). | The Q&T process yields excellent low-temperature toughness, a key advantage over as-rolled weathering grades. | | **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 plain carbon steel (A36).** | Forms a dense, adherent rust patina that retards further corrosion, enabling a maintenance-free aesthetic. | | **Key Feature** | **High-Toughness Weathering Steel:** Delivers the structural efficiency and fracture resistance of a quenched & tempered steel (60 ksi yield) alongside the proven, long-term durability of a weathering grade, ideal for critical exposed structures in demanding environments. | **Product Applications** ASTM A871 Grade 60 is specified for critical, exposed structural applications where a balance of high strength, excellent toughness, and long-term corrosion resistance is required. * **High-Performance Bridges:** Fracture-critical members, lightweight girders, and arches in highway and railway bridges, particularly in cold or corrosive environments. * **Offshore & Marine Structures (Atmospheric Zone):** Topsides modules, helidecks, and living quarters on oil & gas platforms and offshore wind substations. * **Power Transmission & Heavy-Duty Towers:** For lattice towers and poles where reduced weight and elimination of painting provide significant lifecycle benefits. * **Building & Architectural Structures:** Exposed seismic moment frames, long-span roof trusses, and signature architectural elements in aggressive urban atmospheres. * **Heavy Mining & Material Handling Equipment:** Booms, frames, and supports for outdoor equipment where fatigue life and durability are critical. **Advantages & Fabrication Notes** * **Superior Toughness & Fatigue Resistance:** The Q&T microstructure provides significantly better impact toughness and fatigue performance than as-rolled weathering steels like ASTM A588, allowing for more reliable performance under dynamic loads. * **Good Weldability with Procedure Control:** Weldable using low-hydrogen processes. Requires careful attention to: * **Preheat/Interpass Temperature:** Typically 250-350°F (121-177°C) depending on thickness and CE. * **Heat Input Control:** To preserve HAZ toughness. * **Potential for Post-Weld Heat Treatment (PWHT):** May be necessary for thick, highly restrained welds to relieve residual stresses. * **Lifecycle & Sustainability:** Eliminates the recurring cost and environmental impact of painting, offering a sustainable solution for permanent infrastructure. * **Formability:** Limited cold formability due to its high strength. Hot forming requires subsequent re-austentizing, quenching, and tempering. * **Environmental Suitability:** Requires atmospheric exposure with wet/dry cycles to form the protective patina. **Not recommended** for continuous immersion, saltwater splash zones, or atmospheres with high concentrations of chlorides or industrial pollutants. * **Legacy Product Note:** Bethlehem Steel was a leading producer of this advanced weathering Q&T steel. Modern equivalents are readily available as **ASTM A871 Grade 60** from contemporary plate mills. It is often compared to **ASTM A852 (70 ksi yield)** and **ASTM A588 (as-rolled, 50 ksi yield)**, offering an intermediate strength option with superior toughness. **Disclaimer:** This datasheet describes the historical **Bethlehem Steel** product meeting **ASTM A871 Grade 60**. For current procurement, specify **ASTM A871 Grade 60** along with all necessary supplementary requirements (impact testing temperature/energy, UT, max CE). It is critical to recognize this as a **heat-treated steel**; fabrication (welding, thermal cutting) must follow qualified procedures designed for Q&T steels. The project specification must address environmental suitability, fabrication practices to manage weld zone properties, and detailing to facilitate proper patina formation and drainage. The Mill Test Certificate will verify the Q&T condition, chemistry, and mechanical properties from the appropriate test location (surface or T/4). -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A871 Grade 60 3/16 to 6 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4691 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 A871 Grade 60 3/16 to 6 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel Sheet,Plate ASTM A871 Grade 60 3/16 to 6 in. thick, Steel Sheet,Plate plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel Sheet,Plate ASTM A871 Grade 60 3/16 to 6 in. thick, Steel Sheet,Plate plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel Sheet/Plate ASTM A871 Grade 60 3/16 to 6 in. thick, Steel Sheet/Plate 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 Sheet/Plate 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 1162 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