ASTM A242 Steel Flange, type 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 A242 Steel Flange, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ASTM A242 Steel Flange, type 1, 19 mm thick Synonyms -:- For detailed product information, please contact sales. -:

ASTM A242 Steel, type 1, 19 mm thick Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A242 Steel, Type 1 (19 mm thick)** **ASTM A242 Type 1** is a high-strength low-alloy structural steel designed for atmospheric corrosion resistance, offering a minimum yield strength of **345 MPa (50 ksi)** in the **19 mm thickness**. This steel develops enhanced corrosion protection through the formation of a dense, protective oxide patina when exposed to weather, making it particularly suitable for exposed structural applications without protective coatings. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A242/A242M** - "Standard Specification for High-Strength Low-Alloy Structural Steel" **Classification:** - **Type 1** - Copper-phosphorus alloyed for enhanced corrosion resistance - **Type 2** - Alternative chemistry with different corrosion resistance characteristics - **Type 3** - Vanadium or nitrogen treated for different strength levels **International Equivalents:** - **EN 10025-5**: S355J0WP - **JIS G3114**: SMA 400AW - **GB/T 4171**: Q355NH - **ISO 4952**: WR 350 A --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A242 Type 1 (19 mm thick): | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.15 | | Manganese (Mn) | 1.00 | | Phosphorus (P) | 0.15 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.30 | | Copper (Cu) | 0.20 min | | Chromium (Cr) | 0.50-1.25 | | Nickel (Ni) | 0.50 | **Key Composition Features:** - **Copper-Phosphorus System**: Primary corrosion resistance mechanism - **Chromium Addition**: 0.50-1.25% for enhanced atmospheric resistance - **Controlled Carbon**: Maximum 0.15% for weldability - **Copper Requirement**: Minimum 0.20% for corrosion protection --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (19 mm thickness):** | Property | Value | |---|---| | **Tensile Strength** | 480-620 MPa (70-90 ksi) | | **Yield Strength (min.)** | 345 MPa (50 ksi) | | **Elongation in 2" (min.)** | 18% | | **Elongation in 8" (min.)** | 21% | **Corrosion Resistance Properties:** - **Atmospheric Corrosion Resistance**: 2-4 times better than carbon steel - **Patina Formation**: Develops protective oxide layer over time - **Weathering Characteristics**: Improves with exposure duration **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 49.5 W/m·K - **Coefficient of Thermal Expansion**: 11.8 × 10⁻⁶/°C - **Specific Heat Capacity**: 480 J/kg·K --- #### **4. Product Applications** **Architectural Structures:** - Exposed building facades - Architectural features - Bridge exterior components - Monumental structures **Transportation Infrastructure:** - Unpainted bridge components - Highway sign supports - Guard rail systems - Transportation facility structures **Industrial Applications:** - Exposed structural members - Industrial building frames - Material handling structures - Processing plant components **Special Applications:** - Sculptural elements - Landscape architecture - Marine coastal structures - Rural construction --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Good Weldability**: With proper procedure control - **Preheat Requirements**: Generally not required for 19 mm thickness - **Recommended Processes**: SMAW, GMAW, FCAW - **Filler Metals**: E7018, ER70S-6 or weathering steel compatible - **Special Considerations**: Matching weathering characteristics in weld metal **Forming & Cutting:** - **Good Formability**: Suitable for standard structural forming - **Bend Radius**: Typically 2t for 90° bends - **Cutting Methods**: Plasma, laser, oxy-fuel, and shear cutting - **Edge Preparation**: Standard practices applicable **Corrosion Performance:** - **Patina Development**: Requires wet/dry cycling for proper formation - **Initial Staining**: May produce runoff during early exposure - **Maintenance**: Generally requires no painting when properly exposed - **Environmental Suitability**: Best in open atmospheric exposure **Quality Assurance:** - **Mechanical Testing**: Tensile and bend tests required - **Chemical Analysis**: Heat certification mandatory - **Corrosion Testing**: When specified for verification - **Visual Inspection**: Standard quality requirements --- ### **Technical Summary** ASTM A242 Type 1 steel in 19 mm thickness represents an optimal solution for structural applications requiring both high strength and enhanced atmospheric corrosion resistance. The 19 mm thickness provides excellent balance between structural capacity and fabrication flexibility, making it suitable for a wide range of exposed structural components. The copper-phosphorus-chromium alloy system creates a protective patina that significantly improves corrosion resistance compared to conventional carbon steels, typically offering 2-4 times longer service life in atmospheric exposure. This self-protecting characteristic eliminates the need for protective coatings in many applications, reducing long-term maintenance costs. The material's 345 MPa minimum yield strength provides significant weight-saving advantages over conventional structural steels, while maintaining good weldability and formability characteristics. The 19 mm thickness is particularly well-suited for medium-duty structural members, connection plates, and architectural elements where both strength and corrosion performance are important design considerations. ASTM A242 Type 1 has established itself as a preferred material for bridges, architectural structures, and exposed industrial applications where the combination of structural efficiency, aesthetic appeal, and reduced maintenance requirements provide significant lifecycle cost advantages over painted carbon steel structures. -:- For detailed product information, please contact sales. -: ASTM A242 Steel, type 1, 19 mm thick Specification Dimensions Size： Diameter 20-1000 mm Length <4352 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 A242 Steel, type 1, 19 mm thick Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A242 Steel Flange, type 1, 19 mm thick -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A242 Steel Flange, type 1, 19 mm thick -:- For detailed product information, please contact sales. -:

Packing of ASTM A242 Steel Flange, type 1, 19 mm thick -:- 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 823 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