ASTM A871 HSLA Steel Sheet,Plate Grade 60, Hot-Rolled

ASTM A871 HSLA Steel Sheet/Plate Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) Product Information -:- For detailed product information, please contact sales. -: ASTM A871 HSLA Steel Sheet/Plate Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A871 HSLA Steel Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A871 Grade 60 High-Strength Low-Alloy (HSLA) Steel** **ASTM A871 Grade 60** is a **hot-rolled, high-strength, low-alloy structural steel** specifically engineered to provide **improved atmospheric corrosion resistance** in structural shapes, plates, and sheet piling. Designed for the **5-35 mm (3/16 to 1-3/8 in.) thickness range**, this grade delivers a **minimum yield strength of 60 ksi (415 MPa)** while offering **corrosion resistance approximately twice that of plain carbon steel with similar copper content**. The steel achieves its properties through a balanced alloy system featuring copper, chromium, and optional microalloys, supplied in the as-hot-rolled condition. It is available in both **standard and improved sulfide shape control ("SX") grades**, with the latter offering enhanced resistance to lamellar tearing for critical welded connections. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A871/A871M** - Standard Specification for High-Strength Low-Alloy Structural Steel Plate With Improved Atmospheric Corrosion Resistance. * **Grade Variants:** Available as **Grade 60** and **Grade 60SX**. The **"SX" designation** indicates steel produced with improved sulfide shape control for superior through-thickness (Z-direction) properties. * **Governing Standard:** **ASTM A6/A6M** - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling. * **Related Specifications:** * **ASTM A588/A588M** - High-Strength Low-Alloy Structural Steel with 50 ksi Minimum Yield Point and Atmospheric Corrosion Resistance (a more common weathering steel spec). * **AWS D1.1** - Structural Welding Code – Steel. * **Condition:** Supplied in the **hot-rolled condition**. --- ## **Chemical Composition (Weight %, max unless range is specified) - Grade 60** The composition is designed to provide a balance of strength, weldability, and atmospheric corrosion resistance, with copper as the key element. | Element | Composition (%) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | 0.22 max | Provides strength; controlled for weldability. | | **Manganese (Mn)** | 1.35 max | Primary solid solution strengthener. | | **Phosphorus (P)** | 0.04 max | Contributes to atmospheric corrosion resistance. | | **Sulfur (S)** | 0.05 max (Standard); 0.05 max (SX)* | Impurity. In SX grades, sulfides are shape-controlled (e.g., treated with calcium) to improve ductility. | | **Silicon (Si)** | 0.30 max | Deoxidizer and strengthener. | | **Copper (Cu)** | **0.20 min** | **Core alloying element.** Provides the fundamental improvement in atmospheric corrosion resistance. | | **Chromium (Cr)** | 0.40 - 0.65 | Enhances atmospheric corrosion resistance. | | **Nickel (Ni)** | 0.40 max | May be present; enhances toughness and corrosion resistance. | | **Vanadium (V)** | 0.02 - 0.10 (optional) | Microalloy for precipitation strengthening and grain refinement. | | **Columbium (Cb/Nb)** | 0.005 - 0.05 (optional) | Microalloy for grain refinement. | *Note for SX Grade:* The key difference is not a lower sulfur maximum, but the **metallurgical treatment to modify sulfide inclusion shape** from elongated stringers to more globular forms, dramatically improving through-thickness ductility. --- ## **Typical Physical & Mechanical Properties (Hot-Rolled, Thickness 5-35 mm / 3/16 to 1-3/8 in.)** Properties are for hot-rolled material in the specified thickness range. | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 520 - 690 MPa (75,000 - 100,000 psi) | | **Yield Strength (min)** | **415 MPa (60,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 19% | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Charpy V-Notch Impact Toughness** | Not routinely required by the base specification but can be specified via supplementary requirements (e.g., at 0°F / -18°C). | | **Atmospheric Corrosion Resistance** | Approximately **2 times** greater than plain carbon steel (in similar environments). | | **Through-Thickness (Z-Direction) Ductility** | **Standard Grade:** Typical. **SX Grade:** **Significantly improved** resistance to lamellar tearing due to sulfide shape control. | --- ## **Product Applications** ASTM A871 Grade 60 is used for structural components where a combination of higher strength and moderate atmospheric corrosion resistance is beneficial, often in painted applications to extend service life. **Primary Industries and Products:** 1. **Structural Framing & Construction:** * **Purlins, girts, and light structural members** for industrial and commercial buildings. * **Transmission and communication tower** components. * **Support structures** for signs and lighting. 2. **Transportation Equipment:** * **Frame rails, crossmembers, and subframes** for heavy trucks, trailers, and buses. * **Chassis components** for agricultural and construction equipment. * **Railcar underframe components**. 3. **Material Handling & Storage:** * **Heavy-duty storage rack** uprights and beams. * **Industrial platforms, stairways, and catwalks**. 4. **Sheet Piling & Retaining Structures:** * **Light to medium sheet piling** for temporary or permanent retaining walls where improved durability is desired. --- ## **Advantages and Critical Fabrication Considerations** * **Advantages:** * **Enhanced Durability:** Provides a measurable improvement in corrosion resistance over standard structural steels (like A572 Grade 60), potentially extending paint life and reducing maintenance. * **Higher Strength:** 60 ksi yield strength allows for lighter, more efficient designs compared to 50 ksi steels. * **Good Weldability:** Moderate carbon equivalent enables welding with standard low-hydrogen practices. * **SX Grade Option:** The availability of sulfide shape-controlled steel provides a solution for highly restrained welded joints susceptible to lamellar tearing. * **Critical Fabrication Considerations:** * **Welding:** **Low-hydrogen welding practices are recommended.** Preheat may be advisable for thicker sections within this range (>~20 mm) or highly restrained joints. For SX grade, welding procedures are similar but benefit from the improved Z-properties. * **Corrosion Performance Context:** This is **not a true "unpainted weathering steel"** like A588. Its corrosion resistance is an **improvement** intended primarily to **enhance the performance of painted systems** or for use in mild atmospheres where some rust staining is acceptable. For classic unpainted weathering steel applications with a stable patina, A588 is preferred. * **Forming:** Good cold forming characteristics within the thickness range. Adhere to minimum bend radius recommendations (typically 2x-3x thickness). * **Identification:** Clearly distinguish between standard and SX grades during procurement and fabrication, as they are not interchangeable for critical applications requiring high through-thickness ductility. * **Galvanizing:** Can be hot-dip galvanized, but the thermal cycle may cause some reduction in yield strength; verification testing is recommended if strength is critical. **In summary, ASTM A871 Grade 60 is a practical and cost-effective HSLA steel offering a 60 ksi yield strength with a proven boost in atmospheric corrosion resistance. It is an excellent choice for fabricated structural components where added durability is valued, particularly when used in conjunction with a protective coating system. The optional SX grade provides an important engineering solution for mitigating lamellar tearing in demanding welded fabrications.** -:- For detailed product information, please contact sales. -: ASTM A871 HSLA Steel Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) Specification Dimensions Size： Diameter 20-1000 mm Length <4550 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. -: ASTM A871 HSLA Steel Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A871 HSLA Steel Sheet,Plate Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A871 HSLA Steel Sheet,Plate Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) -:- For detailed product information, please contact sales. -:

Packing of ASTM A871 HSLA Steel Sheet/Plate Grade 60, Hot-Rolled, 5-35 mm (3/16 to 1 3/8 in.) -:- 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 1021 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