ASTM A572 Steel Flange, grade 42

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 A572 Steel Flange, grade 42 Product Information -:- For detailed product information, please contact sales. -: ASTM A572 Steel Flange, grade 42 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A572 Steel, grade 42 Product Information -:- For detailed product information, please contact sales. -: ### **ASTM A572 Grade 42: High-Strength Low-Alloy Columbium-Vanadium Steel** #### **1. Overview** ASTM A572 Grade 42 is a **high-strength low-alloy (HSLA) steel** characterized by its **enhanced strength-to-weight ratio** and improved atmospheric corrosion resistance compared to carbon steels. This grade is part of the A572 specification that covers various high-strength, low-alloy structural steel shapes, plates, and sheet piling intended for welded, bolted, or riveted construction. Grade 42 provides an economical solution for structural applications where weight reduction is important. #### **2. Chemical Composition** The chemical composition is optimized for strength and weldability: | Element | Composition (%) | |---------|-----------------| | Carbon (C) | 0.21 max | | Manganese (Mn) | 1.35 max | | Phosphorus (P) | 0.035 max | | Sulfur (S) | 0.035 max | | Silicon (Si) | 0.30 max | | Columbium (Cb) | 0.005 - 0.05 | | Vanadium (V) | 0.01 - 0.10 | **Key Composition Features:** - **Columbium-Vanadium Addition**: Provides precipitation strengthening - **Controlled Carbon Content**: Ensures good weldability - **Moderate Manganese**: Enhances strength and hardenability - **Low Silicon Content**: Maintains good formability #### **3. Physical & Mechanical Properties** **Mechanical Properties:** | Property | Requirement | |----------|-------------| | **Tensile Strength** | 60 ksi min (415 MPa min) | | **Yield Strength** | 42 ksi min (290 MPa min) | | **Elongation in 2 inches** | 24% min | **Enhanced Performance Characteristics:** - **Improved Strength-to-Weight Ratio**: Lighter structures possible compared to carbon steels - **Good Weldability**: Suitable for all standard welding processes - **Atmospheric Corrosion Resistance**: Approximately twice that of carbon steel - **Excellent Toughness**: Good impact properties at service temperatures **Physical Properties (Typical):** - **Density**: 0.284 lb/in³ (7,850 kg/m³) - **Modulus of Elasticity**: 29,000 ksi (200 GPa) - **Poisson's Ratio**: 0.29 - **Thermal Expansion Coefficient**: 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) - **Thermal Conductivity**: 43.0 W/m·K at 212°F (100°C) #### **4. Product Applications** Grade 42 is widely used in structural and construction applications: **Building Construction:** - Structural frames and supports - Building columns and beams - Roof trusses and purlins - Building facade systems **Bridge Construction:** - Bridge girders and stringers - Bridge deck supports - Pedestrian bridge components - Temporary bridge structures **Industrial Structures:** - Industrial building frames - Material handling structures - Support structures for equipment - Platform and walkway systems **Transportation Infrastructure:** - Highway sign supports - Guard rail components - Traffic signal structures - Transportation equipment frames #### **5. International Standards & Equivalents** | Region/Country | Standard | Equivalent Grade | Notes | |----------------|----------|------------------|-------| | **International** | **ISO 4951** | E355 | High yield strength steel | | **Europe** | **EN 10025-4** | S355J0 | Thermomechanical rolled weldable steel | | **Japan** | **JIS G3106** | SM490A | Welded structure steel | | **China** | **GB/T 1591** | Q345B | Low alloy high strength steel | **A572 Grade Comparison:** | Grade | Yield Strength min | Tensile Strength min | Typical Applications | |-------|-------------------|---------------------|---------------------| | **Grade 42** | 42 ksi | 60 ksi | Light to medium structures | | **Grade 50** | 50 ksi | 65 ksi | General construction | | **Grade 55** | 55 ksi | 70 ksi | Heavy structural applications | #### **6. Fabrication & Quality Assurance** **Forming and Fabrication:** - **Cold Forming**: Good cold bending and forming capabilities - **Hot Forming**: Can be hot-formed when required - **Welding**: Excellent weldability with proper procedures - **Machining**: Good machinability with appropriate tooling **Welding Considerations:** - **Pre-heat**: Generally not required for thin sections - **Electrodes**: Low-hydrogen electrodes recommended for thick sections - **Procedures**: Standard welding procedures applicable - **Post-weld Treatment**: Stress relief generally not required **Quality Control:** - **Tension Tests**: From each heat or lot - **Bend Tests**: Required to verify ductility - **Impact Tests**: Not typically required unless specified - **Chemical Analysis**: For each heat of steel --- **Technical Advantages:** - **Cost-effective** high-strength alternative to carbon steel - **Improved corrosion resistance** compared to carbon steels - **Good strength-to-weight ratio** for economical designs - **Excellent fabricability** with standard equipment **Design Considerations:** - **Structural applications** requiring moderate strength - **Weight-sensitive designs** where material savings are important - **Welded construction** with standard procedures - **Atmospheric exposure** applications **Service Limitations:** - **Not recommended** for pressure vessel applications - **Limited low-temperature toughness** for cryogenic service - **Corrosion protection** required for severe environments - **Maximum thickness limitations** for structural applications **Disclaimer:** This information is for technical reference only. For structural applications, consult the latest ASTM A572 specification and applicable building codes. Material selection should consider specific service conditions, loading requirements, and environmental factors. All designs must be approved by qualified structural engineers and comply with relevant construction standards and safety regulations. -:- For detailed product information, please contact sales. -: ASTM A572 Steel, grade 42 Specification Dimensions Size： Diameter 20-1000 mm Length <4464 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 A572 Steel, grade 42 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A572 Steel Flange, grade 42 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A572 Steel Flange, grade 42 -:- For detailed product information, please contact sales. -:

Packing of ASTM A572 Steel Flange, grade 42 -:- 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 935 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