ASTM A812 HSLA Steel Flange Grade 65

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 A812 HSLA Steel Flange Grade 65 Sheet Product Information -:- For detailed product information, please contact sales. -: ASTM A812 HSLA Steel Flange Grade 65 Sheet Synonyms -:- For detailed product information, please contact sales. -:

ASTM A812 HSLA Steel Grade 65 Sheet Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: ASTM A812 High-Strength Low-Alloy (HSLA) Steel Grade 65 Sheet** **ASTM A812 Grade 65** is a **high-strength, low-alloy steel sheet and strip** specifically engineered for **welded, bolted, or riveted structural components requiring exceptional strength-to-weight ratios**. This grade offers a **minimum yield strength of 65 ksi (450 MPa)**, making it a premium choice for weight-sensitive applications across transportation and construction sectors. The steel achieves its high strength primarily through **microalloying with elements like niobium (columbium), vanadium, and titanium** in combination with **controlled hot-rolling** and, for some products, **accelerated cooling** or specific heat treatments. It is particularly noted for providing high strength while maintaining good cold formability and weldability relative to its strength level. --- ## **International Standard & Key Specifications** * **Primary Standard:** **ASTM A812/A812M** - Standard Specification for High-Strength Low-Alloy Steel Sheet and Strip for Welded, Bolted, or Riveted Structural Components. * **Key Feature:** This specification is designed for **fabricated structural components** rather than primary building frames, emphasizing properties relevant to forming and joining in sheet/strip forms. * **Governing Standards:** * **ASTM A941** - Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys. * **ASTM A370** - Standard Test Methods and Definitions for Mechanical Testing of Steel Products. * **Product Forms:** Supplied as **hot-rolled sheet and strip**, with the potential for enhanced properties through specific manufacturing processes at the mill's discretion. --- ## **Chemical Composition (Weight %, max unless range is specified) - Grade 65** The composition is balanced to achieve high strength through microalloy precipitation strengthening and grain refinement, while maintaining good weldability through controlled carbon content. | Element | Composition (%) | Role in Performance | | :--- | :--- | :--- | | **Carbon (C)** | 0.20 max | Controlled for a balance of strength and weldability. | | **Manganese (Mn)** | 1.35 max | Primary solid-solution strengthener; enhances hardenability. | | **Phosphorus (P)** | 0.04 max | Impurity, kept low. | | **Sulfur (S)** | 0.05 max | Impurity, controlled for formability and weldability. | | **Silicon (Si)** | 0.30 max | Deoxidizer and strengthener. | | **Copper (Cu)*** | 0.20 min (when specified) | Added when enhanced atmospheric corrosion resistance is required. | | **Columbium (Cb/Nb)** | 0.005 - 0.10 | **Primary microalloy.** Forms Nb(CN) precipitates for grain refinement and precipitation strengthening. | | **Vanadium (V)** | 0.01 - 0.10 | Complementary microalloy for precipitation strengthening via V(C,N). | | **Titanium (Ti)** | 0.005 - 0.10 | Microalloy for grain refinement and sulfide shape control. | | **Aluminum (Al)** | 0.10 max | Grain refining deoxidizer. | *Note:* The specific combination and amounts of Cb, V, and Ti are proprietary to the steel producer and are optimized to achieve the Grade 65 mechanical properties. --- ## **Typical Physical & Mechanical Properties (Grade 65 Sheet)** Properties are for hot-rolled sheet/strip, with exact values depending on gauge and mill processing. | Property | Value / Description | | :--- | :--- | | **Tensile Strength** | 580 - 725 MPa (84,000 - 105,000 psi) | | **Yield Strength (min)** | **450 MPa (65,000 psi)** | | **Elongation in 2-in (50 mm) (min)** | 16% (for sheet < 3mm thick, elongation requirements are specified differently) | | **Yield-to-Tensile Ratio (max)** | Typically ≤ 0.85 | Ensures a margin of safety and formability. | | **Modulus of Elasticity** | ~200 GPa (29 x 10⁶ psi) | | **Density** | ~7.85 g/cm³ (0.284 lb/in³) | | **Formability** | Good for its strength level; suitable for moderate bending and stamping. Minimum bend radius is typically **2-3 times material thickness**. | | **Atmospheric Corrosion Resistance** | Approximately **2 times** that of plain carbon steel (when Cu-bearing). | --- ## **Product Applications** ASTM A812 Grade 65 sheet and strip are used in demanding, weight-critical structural components where high strength allows for gauge reduction and performance improvement. **Primary Industries and Products:** 1. **Heavy-Duty Transportation Equipment:** * **Frame Rails**, **Crossmembers**, and **Suspension Components** for heavy trucks, trailers, and buses. * **Chassis Components** for construction, agricultural, and mining equipment (e.g., loader arms, booms, chassis). * **Rail Car Underframes** and **Structural Members**. 2. **Material Handling & Storage:** * **Heavy-Duty Pallet Racking** (uprights and beams for high-capacity systems). * **Industrial Shelving** and **storage system components**. * **Lifting Equipment** such as crane boom sections and forklift masts. 3. **Construction & Infrastructure:** * **Lightweight Structural Supports** and **bracing**. * **Formwork** and **shoring** components. * **Bases and Enclosures** for heavy machinery. 4. **General Heavy Fabrication:** * **Custom Fabricated Guards**, **platforms**, and **access structures** requiring high strength. * **Brackets**, **mounts**, and **reinforcements** in high-stress areas. --- ## **Advantages and Fabrication Considerations** * **Advantages:** * **High Strength-to-Weight Ratio:** 65 ksi yield strength enables significant weight reduction in structural designs. * **Good Cold Formability:** Can be bent, rolled, and stamped into complex shapes within recommended limits. * **Good Weldability (with proper procedure):** The controlled carbon content allows welding with common processes, though low-hydrogen practices are recommended. * **Cost-Effective Strength:** Provides high strength without the cost of heat-treated alloy steels. * **Critical Fabrication Considerations:** * **Bend Radius:** Minimum bend radius is typically larger than for mild steel. For 90-degree cold bending perpendicular to the rolling direction, a radius of **2.5x to 3x material thickness** is generally recommended. * **Welding:** **Low-hydrogen welding practices** (e.g., GMAW with 75% Ar/25% CO₂, or SMAW with E7018) are strongly advised to prevent hydrogen-induced cracking, especially in thicker gauges or restrained joints. Preheat may be beneficial for sections over 0.5 inches (13 mm). * **Thermal Effects:** Exposure to temperatures above approximately **800°F (425°C)** can alter the microalloy precipitation and potentially lower strength. This is critical if post-forming hot-dip galvanizing is planned; strength loss should be evaluated. * **Shearing and Punching:** Higher strength requires greater tonnage for shearing and punching operations. Tool wear will be more significant than with mild steel. * **Springback:** Exhibits greater springback during forming than lower-strength steels; tooling and processes must account for this. **In summary, ASTM A812 Grade 65 is a high-performance microalloyed HSLA steel sheet that delivers an excellent balance of 65 ksi yield strength, manufacturability, and structural efficiency. It is an ideal material for engineers and fabricators designing and producing weight-optimized, high-strength components, particularly in the heavy transportation and material handling industries, where its formability and weldability enable complex, durable designs.** -:- For detailed product information, please contact sales. -: ASTM A812 HSLA Steel Grade 65 Sheet Specification Dimensions Size： Diameter 20-1000 mm Length <4543 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 A812 HSLA Steel Grade 65 Sheet Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A812 HSLA Steel Flange Grade 65 Sheet -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A812 HSLA Steel Flange Grade 65 Sheet -:- For detailed product information, please contact sales. -:

Packing of ASTM A812 HSLA Steel Flange Grade 65 Sheet -:- 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 1014 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