ASTM A227 Steel Flange, Class II

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 A227 Steel Flange Flange, Class II Product Information -:- For detailed product information, please contact sales. -: ASTM A227 Steel Flange Flange, Class II Synonyms -:- For detailed product information, please contact sales. -:

ASTM A227 Steel Wire, Class II Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A227 Class II Steel Wire** **ASTM A227 Class II** is a cold-drawn carbon steel wire classified as special quality within the A227 specification, offering closer dimensional tolerances and more consistent mechanical properties compared to Class I. This class is designed for mechanical spring applications requiring higher precision and reliability. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A227/A227M** - "Standard Specification for Steel Wire, Cold-Drawn for Mechanical Springs" **Classification:** - **Class II** - Special quality with closer dimensional tolerances - **Class I** - Standard quality grade **International Equivalents:** - **EN 10270-1**: SH (Spring Hardened) grade - **JIS G 3521**: SWP-B - **GB/T 4357**: Grade C - **ISO 8458-2**: Class B --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A227 Class II: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.85-0.95 | | Manganese (Mn) | 0.30-0.60 | | Phosphorus (P) | 0.020 | | Sulfur (S) | 0.020 | | Silicon (Si) | 0.10-0.30 | **Key Composition Features:** - **High Carbon Content**: 0.85-0.95% for optimal spring properties - **Tighter Impurity Control**: Lower phosphorus and sulfur limits - **Controlled Manganese**: Ensures consistent hardenability - **Silicon Range**: Provides uniform strengthening --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Typical for various diameters):** | Wire Diameter (mm) | Tensile Strength (MPa) | Torsion Tests (min. twists) | |---|---|---| | 0.50-1.00 | 1900-2200 | 22-27 | | 1.01-2.00 | 1800-2100 | 20-24 | | 2.01-3.00 | 1700-2000 | 18-22 | | 3.01-4.00 | 1600-1900 | 16-20 | **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Shear Modulus**: 77 GPa (11,200 ksi) - **Thermal Conductivity**: 49.5 W/m·K - **Coefficient of Thermal Expansion**: 11.5 × 10⁻⁶/°C --- #### **4. Product Applications** **Precision Spring Manufacturing:** - High-precision compression springs - Critical extension springs - Precision torsion springs - Instrument springs **Industrial Applications:** - Precision mechanical seals - Critical valve springs - Electrical relay springs - Precision mechanism springs **Automotive Applications:** - Fuel injection springs - Transmission control springs - Precision valve mechanisms - Safety-critical automotive springs **Consumer Products:** - Precision instrument springs - High-quality lock mechanisms - Precision timer springs - Quality appliance components --- #### **5. Fabrication Characteristics** **Forming Performance:** - **Excellent Formability**: Consistent performance in coiling operations - **Predictable Springback**: Tight tolerances for precise forming - **Surface Quality**: Superior surface finish requirements - **Winding Consistency**: Excellent for high-speed automatic coiling **Heat Treatment Considerations:** - **Stress Relieving**: Essential after forming (250-300°C) - **Thermal Stability**: Maintains properties up to 120°C (250°F) - **Processing Consistency**: Uniform response to thermal treatments **Surface and Dimensional Requirements:** - **Tighter Tolerances**: Closer diameter control than Class I - **Superior Surface Finish**: Reduced surface defects - **Dimensional Consistency**: Better straightness and uniformity **Quality Assurance:** - **Enhanced Testing**: More frequent mechanical testing - **Strict Dimensional Control**: Tighter tolerance verification - **Comprehensive Inspection**: Extended surface quality checks - **Batch Consistency**: Improved lot-to-lot uniformity --- ### **Technical Summary** ASTM A227 Class II represents a premium grade of cold-drawn spring steel wire that offers enhanced dimensional consistency and improved mechanical properties compared to Class I. The tighter chemical controls and more stringent manufacturing processes result in wire that exhibits superior performance in precision spring applications. The class's closer dimensional tolerances and more consistent mechanical properties make it particularly valuable for applications where spring performance predictability and manufacturing reliability are critical. The enhanced quality control measures ensure better batch-to-batch consistency, reducing variability in spring production. While maintaining the same fundamental chemical composition as Class I, Class II's improved processing controls and stricter quality standards make it the preferred choice for precision spring manufacturers requiring higher levels of consistency and reliability. The wire's excellent formability and predictable behavior during spring coiling operations contribute to improved manufacturing efficiency and reduced rejection rates. ASTM A227 Class II has established itself as a reliable material for critical spring applications across various industries, particularly where consistent performance, precise dimensions, and reliable mechanical properties are essential requirements for successful spring operation in demanding applications. -:- For detailed product information, please contact sales. -: ASTM A227 Steel Wire, Class II Specification Dimensions Size： Diameter 20-1000 mm Length <4344 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 A227 Steel Wire, Class II Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A227 Steel Flange Flange, Class II -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A227 Steel Flange Flange, Class II -:- For detailed product information, please contact sales. -:

Packing of ASTM A227 Steel Flange Flange, Class II -:- 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 815 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