ASTM A656 Steel Foil/Strip, grade 1

ASTM A656 Steel Foil, grade 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A656 Steel Foil, grade 1 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A656 Steel, grade 1 Product Information -:- For detailed product information, please contact sales. -: ## **Product Technical Data Sheet: ASTM A656 Grade 1 Steel** ### **1. PRODUCT OVERVIEW** **ASTM A656 Grade 1** is a **high-strength, low-alloy (HSLA), thermo-mechanically controlled processed (TMCP)** steel plate specifically engineered for applications demanding an exceptional balance of **very high strength, excellent weldability, and good toughness**. Unlike conventional as-rolled or normalized steels, Grade 1 is produced through a precisely controlled rolling and accelerated cooling process. This modern metallurgical practice results in a fine-grained microstructure that delivers **yield strengths of 80 ksi (550 MPa) and higher**, combined with relatively low carbon content, making it a premier choice for weight-critical, high-performance structures where welding is a key fabrication method. ### **2. INTERNATIONAL STANDARDS & SPECIFICATIONS** * **Primary Standard:** **ASTM A656 / A656M** - "Standard Specification for Hot-Rolled Structural Steel, High-Strength Low-Alloy Plate with Improved Formability." This specification covers several grades with different strength levels. * **Key Reference Standards:** * **ASTM A6 / A6M** - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling. Governs dimensions, quality, and testing procedures unless otherwise specified in A656. * **ASTM A370** - Standard Test Methods and Definitions for Mechanical Testing of Steel Products. * **Comparable International Grades:** While not direct equivalents, grades like **EN 10149-2 S550MC** or **JIS G 3136 SPFC 590** share similar TMCP principles and high-strength characteristics. ### **3. CHEMICAL COMPOSITION (Typical Heat Analysis, Maximum % or Range)** The chemistry of A656 Grade 1 is characterized by **very low carbon** and carefully balanced microalloying additions to facilitate TMCP and ensure weldability. | Element | Symbol | Typical Composition (max. or range) | Role & Influence | | :--- | :--- | :--- | :--- | | **Carbon (C)** | C | **0.18 max** | **Kept very low** to ensure excellent weldability and toughness. Primary strength comes from TMCP, not carbon. | | **Manganese (Mn)** | Mn | 1.60 max | Principal solid solution strengthener. Higher levels are used to compensate for low carbon. | | **Phosphorus (P)** | P | 0.025 max | Impurity; kept very low for good toughness. | | **Sulfur (S)** | S | 0.025 max | Impurity; kept very low to minimize sulfide inclusions and improve ductility. | | **Silicon (Si)** | Si | 0.40 max | Deoxidizer; provides some solid solution strengthening. | | **Columbium (Nb)** | Cb | 0.02 - 0.15* | Key microalloying element. Inhibits recrystallization during TMCP, promoting a fine-grained microstructure for strength and toughness. | | **Vanadium (V)** | V | 0.02 - 0.15* | Secondary microalloying element; contributes to precipitation strengthening. | | **Titanium (Ti)** | Ti | 0.025 - 0.15* | Added for grain refinement and to stabilize nitrogen, improving toughness. | | **Nitrogen (N)** | N | 0.015 max | Controlled; forms beneficial nitrides with Ti/V. | **\*** The combination and amount of microalloying elements (Cb, V, Ti) are critical and are optimized by the steelmaker to achieve the required properties through the TMCP schedule. ### **4. PHYSICAL & MECHANICAL PROPERTIES** #### **Mechanical Properties (Minimum Requirements per ASTM A656)** | Property | Value (Imperial) | Value (Metric) | Note | | :--- | :--- | :--- | :--- | | **Yield Strength (min)** | 80 ksi | 550 MPa | Measured at 0.5% extension under load. **Note:** Some producers offer "YP70" variants with a 70 ksi min yield for better formability. | | **Tensile Strength (min)** | 90 ksi | 620 MPa | | | **Elongation in 2" (50mm) (min)** | 18% (for ≤ 3/4 in.) | 18% | Indicates good ductility despite high strength. Minimum elongation decreases slightly with increasing thickness. | | **Modulus of Elasticity** | 29,000 ksi | 200 GPa | Typical for steel. | #### **Physical Properties (Typical)** | Property | Value | | :--- | :--- | | **Density** | 0.284 lb/in³ (7,850 kg/m³) | | **Thermal Conductivity** | ~36-42 W/m·K (at 100°C) | Slightly higher than conventional steels due to low alloy content. | | **Coefficient of Thermal Expansion** | ~11.5 x 10⁻⁶ /°C (20-100°C) | ### **5. KEY CHARACTERISTICS & PROCESSING** * **Superior Weldability:** The **low carbon equivalent (typically < 0.40)** is the defining feature. This drastically reduces the risk of hydrogen-induced cold cracking, often allowing welding without preheat or with minimal preheat, even at significant thicknesses. This results in faster fabrication and lower costs. * **Excellent Toughness:** The fine-grained TMCP microstructure provides excellent impact toughness at low temperatures, often exceeding standard Charpy V-Notch requirements. * **Good Formability:** The combination of high strength and good elongation allows for more severe forming (bending, rolling) than traditional HSLA steels of similar strength. * **Thermo-Mechanical Processing (TMCP):** The strength is derived from a controlled hot-rolling schedule finishing at a precise temperature (often in the austenite non-recrystallization region) followed by accelerated cooling. This is **not** a heat-treated steel. * **Surface:** Supplied with a standard hot-rolled mill scale surface. Can be supplied as-produced or blast-cleaned. ### **6. PRODUCT APPLICATIONS** ASTM A656 Grade 1 is the material of choice for modern, optimized structural designs where weight savings, fabricability, and performance are critical. * **Heavy-Duty Truck & Trailer Manufacturing:** Main frames (rails), crossmembers, fifth wheels, and suspension components for dump trucks, logging trucks, and lowboy trailers. * **Mobile Crane & Equipment Carriers:** Booms, outriggers, and main chassis where high strength-to-weight ratio directly translates to greater payload or reach. * **Mining & Construction Equipment:** Structural members for excavators, loaders, and drilling rigs subjected to high dynamic loads. * **Material Handling:** High-capacity forklift masts, heavy-duty racking systems, and crane runway girders. * **Energy & Infrastructure:** Wind turbine towers (transition pieces), support structures in oil & gas, and components for bridge construction where weldability is paramount. ### **7. AVAILABILITY & NOTES** * **Form:** Supplied as **hot-rolled plate**. * **Thickness Range:** Typically available from about 1/4 inch (6 mm) up to 2 inches (50 mm) or more, depending on the mill. * **Important Note:** The designation "Grade 1" within ASTM A656 specifically refers to a **minimum yield strength of 80 ksi**. Buyers must clearly specify **ASTM A656 Grade 1** and the required **minimum yield strength level (e.g., 80 ksi or 70 ksi)**. It is distinct from and significantly stronger than "Grade 50" steels like ASTM A572. --- **Disclaimer:** This data sheet provides general information. For specification and procurement, engineers **must** consult the full ASTM A656/A6 standards and the manufacturer's certified mill test reports for the specific lot of material. Welding procedures should be qualified according to relevant codes (e.g., AWS D1.1, D1.8). -:- For detailed product information, please contact sales. -: ASTM A656 Steel, grade 1 Specification Dimensions Size： Diameter 20-1000 mm Length <4732 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 A656 Steel, grade 1 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A656 Steel Foil, grade 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A656 Steel Foil, grade 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A656 Steel Foil/Strip, grade 1 -:- 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 Foil/Strip 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 1203 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