ASTM A656 Steel Flange, grade 1

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: ASTM A656 Steel Flange, grade 1 Product Information -:- For detailed product information, please contact sales. -: ASTM A656 Steel Flange, 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 Flange, grade 1 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A656 Steel Flange, grade 1 -:- For detailed product information, please contact sales. -:

Packing of ASTM A656 Steel Flange, 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 Flange 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