ASTM A709 Steel Flange, grade 36

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 A709 Steel Flange, grade 36, carbon Steel Flange bar (diam ≤ 200 mm) Product Information -:- For detailed product information, please contact sales. -: ASTM A709 Steel Flange, grade 36, carbon Steel Flange bar (diam ≤ 200 mm) Synonyms -:- For detailed product information, please contact sales. -:

ASTM A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A709 Grade 36 Carbon Steel Bar (Diameter ≤ 200 mm)** **ASTM A709 Grade 36** is a structural carbon steel bar specifically designed for bridge construction applications, offering a minimum yield strength of **36 ksi (250 MPa)**. As part of the comprehensive A709 specification for bridge steels, Grade 36 provides reliable performance in structural components where durability and weldability are essential. The **diameter limitation of ≤ 200 mm** ensures consistent mechanical properties throughout the cross-section, making it suitable for critical load-bearing applications in bridge engineering. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A709/A709M** - "Standard Specification for Structural Steel for Bridges" **Grade Classification:** - **Grade 36** - Minimum yield strength 36 ksi (250 MPa) - Other grades in A709 series: 50, 50W, HPS 50W, 70W, HPS 70W, 100, 100W **International Equivalents:** - **EN 10025-2**: S275JR/S275J0 - **JIS G3106**: SM490 - **GB/T 714**: Q345q - **ISO 630-2**: E275C --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A709 Grade 36 bars (≤ 200 mm): | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.25 | | Manganese (Mn) | 0.80-1.20 | | Phosphorus (P) | 0.04 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.40 | | Copper (Cu) | 0.20 (min. for atmospheric corrosion resistance) | **Key Composition Features:** - **Controlled Carbon**: Balances strength and weldability - **Enhanced Manganese**: Provides solid solution strengthening - **Copper Requirement**: Minimum 0.20% for improved corrosion resistance - **Bridge-Quality Chemistry**: Optimized for structural integrity --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (for diameters ≤ 200 mm):** | Property | Value | |---|---| | **Tensile Strength** | 400-550 MPa (58-80 ksi) | | **Yield Strength (min.)** | 250 MPa (36 ksi) | | **Elongation in 2" (min.)** | 20% | | **Elongation in 8" (min.)** | 23% | | **Reduction of Area (min.)** | 40% | **Impact Toughness Properties:** - **Charpy V-Notch Test Temperature**: 70°F (21°C) - **Minimum Impact Energy**: 20 ft-lbf (27 J) **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Poisson's Ratio**: 0.29 - **Thermal Conductivity**: 51.9 W/m·K - **Coefficient of Thermal Expansion**: 11.7 × 10⁻⁶/°C --- #### **4. Product Applications** **Bridge Construction:** - Main girders and stringers - Bridge deck supports - Truss members and connections - Bearing components **Structural Components:** - Pin and hanger assemblies - Rocker and roller bearings - Expansion joint supports - Bridge railing systems **Civil Engineering:** - Heavy construction fasteners - Structural connection plates - Anchor bolts and rods - Foundation reinforcement **Transportation Infrastructure:** - Sign support structures - Overhead gantry components - Tunnel support systems - Retaining wall reinforcements **Marine Structures:** - Pier and dock components - Waterfront structure members - Lock and dam equipment - Coastal protection elements --- #### **5. Fabrication Characteristics** **Machining Performance:** - **Good Machinability**: 60-65% of B1112 steel - **Turning Operations**: Suitable for all standard processes - **Threading Capability**: Excellent for structural threading - **Surface Finish**: Good with proper tool geometry **Welding Characteristics:** - **Excellent Weldability**: All common processes applicable - **Preheat Requirements**: Generally not required for diameters ≤ 200 mm - **Recommended Processes**: SMAW, GMAW, FCAW - **Filler Metals**: E70XX series electrodes **Heat Treatment:** - Typically supplied as-rolled or normalized - Stress relieving available when specified - No quenching and tempering required **Quality Assurance:** - **Chemical Analysis**: Heat certification required - **Mechanical Testing**: Tensile and impact tests mandatory - **Non-Destructive Testing**: UT, MT, or PT as specified - **Dimensional Inspection**: Full compliance with specified tolerances --- ### **Technical Summary** ASTM A709 Grade 36 carbon steel bars in diameters up to 200 mm represent a reliable and cost-effective solution for bridge construction and structural applications. The controlled chemical composition and guaranteed mechanical properties ensure consistent performance in critical load-bearing components. The material's excellent weldability and machinability make it particularly suitable for fabricating complex structural connections and custom components. The diameter limitation of ≤ 200 mm ensures uniform properties throughout the cross-section, providing engineers with confidence in structural calculations and design assumptions. The mandatory copper content enhances atmospheric corrosion resistance, contributing to long-term durability in bridge applications. As a bridge-quality material, ASTM A709 Grade 36 undergoes rigorous testing and certification, ensuring compliance with the highest standards of structural integrity. Its proven performance in transportation infrastructure, combined with its fabrication versatility, makes it a preferred choice for engineers designing durable and reliable bridge components where safety and longevity are paramount considerations. -:- For detailed product information, please contact sales. -: ASTM A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Specification Dimensions Size： Diameter 20-1000 mm Length <4315 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 A709 Steel, grade 36, carbon steel bar (diam ≤ 200 mm) Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A709 Steel Flange, grade 36, carbon Steel Flange bar (diam ≤ 200 mm) -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A709 Steel Flange, grade 36, carbon Steel Flange bar (diam ≤ 200 mm) -:- For detailed product information, please contact sales. -:

Packing of ASTM A709 Steel Flange, grade 36, carbon Steel Flange bar (diam ≤ 200 mm) -:- 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 786 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