ASTM A229 Oil-tempered 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 A229 Oil-tempered Steel Flange Flange, Class II Product Information -:- For detailed product information, please contact sales. -: ASTM A229 Oil-tempered Steel Flange Flange, Class II Synonyms -:- For detailed product information, please contact sales. -:

ASTM A229 Oil-tempered Steel Wire, Class II Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A229 Oil-tempered Steel Wire, Class II** **ASTM A229 Class II** is a premium oil-tempered carbon steel wire designed for high-performance mechanical spring applications requiring superior quality and precision. This class offers enhanced dimensional tolerances and improved consistency compared to Class I, making it suitable for critical spring applications where reliability and precision are paramount. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A229/A229M** - "Standard Specification for Steel Wire, Oil-Tempered for Mechanical Springs" **Classification:** - **Class II** - Special quality oil-tempered steel spring wire - **Class I** - Standard quality grade **International Equivalents:** - **EN 10270-2**: FD (Oil Hardened and Tempered) grade - **JIS G 3560**: SWO-B - **GB/T 4358**: Class II - **ISO 8458-3**: Type B --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A229 Class II: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.55-0.65 | | Manganese (Mn) | 0.50-0.90 | | Phosphorus (P) | 0.020 | | Sulfur (S) | 0.020 | | Silicon (Si) | 0.15-0.35 | **Key Composition Features:** - **Controlled Carbon**: 0.55-0.65% optimized for strength and fatigue resistance - **Tighter Impurity Control**: Phosphorus and sulfur limited to 0.020% - **Manganese Optimization**: 0.50-0.90% for consistent hardenability - **Silicon Precision**: 0.15-0.35% for uniform strengthening --- #### **3. Physical & Mechanical Properties** **Mechanical Properties (Enhanced Specifications):** | Wire Diameter (mm) | Tensile Strength (MPa) | Torsion Tests (min. twists) | |---|---|---| | 0.50-1.00 | 1750-2050 | 20-24 | | 1.01-2.00 | 1700-2000 | 18-22 | | 2.01-3.00 | 1650-1950 | 16-20 | | 3.01-4.00 | 1600-1900 | 14-18 | | 4.01-5.00 | 1550-1850 | 12-16 | **Enhanced 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) - **Fatigue Strength**: Superior cyclic loading performance - **Thermal Stability**: Maintains properties up to 180°C (356°F) --- #### **4. Product Applications** **High-Precision Spring Manufacturing:** - Precision automotive valve springs - Critical suspension components - High-performance extension springs - Precision instrument springs **Critical Industrial Applications:** - Engine valve springs for automotive and aerospace - Precision clutch mechanisms - High-speed machinery springs - Critical safety component springs **Transportation and Aerospace:** - Aircraft control system springs - High-performance automotive springs - Racing suspension components - Critical transportation equipment springs **Specialized Applications:** - Medical device springs - Precision measuring instrument springs - High-reliability mechanical systems - Critical industrial automation components --- #### **5. Fabrication Characteristics** **Enhanced Forming Performance:** - **Superior Cold Formability**: Excellent for precision coiling operations - **Predictable Springback**: Tight control for high-precision forming - **Winding Consistency**: Ideal for automated precision coiling equipment - **Surface Integrity**: Higher quality surface requirements **Advanced Heat Treatment:** - **Controlled Oil Tempering**: Uniform microstructure throughout - **Enhanced Temper Resistance**: Suitable for elevated temperature applications - **Stress Relief Optimization**: Improved dimensional stability - **Consistent Hardness**: Tight hardness range control **Premium Surface Quality:** - **Enhanced Surface Finish**: Superior to Class I requirements - **Strict Decarburization Limits**: Minimal allowed surface decarburization - **Dimensional Precision**: Tighter diameter tolerances - **Surface Defect Control**: Strict limitations on surface imperfections **Rigorous Quality Assurance:** - **Enhanced Testing Frequency**: More extensive mechanical testing - **Precision Dimensional Verification**: Tighter tolerance requirements - **Comprehensive Surface Analysis**: Advanced surface quality checks - **Batch Consistency Monitoring**: Superior lot-to-lot uniformity control --- ### **Technical Summary** ASTM A229 Class II represents the premium grade of oil-tempered steel wire, offering enhanced performance characteristics for critical spring applications. The tighter chemical controls, particularly the reduced phosphorus and sulfur limits, combined with more stringent manufacturing processes, result in wire that delivers exceptional consistency and reliability in high-performance spring applications. This class's superior dimensional tolerances and enhanced mechanical properties make it indispensable for applications where spring performance predictability and manufacturing precision are critical. The improved fatigue resistance and thermal stability compared to Class I provide additional safety margins for demanding applications in automotive, aerospace, and industrial sectors. The wire's excellent formability and predictable behavior during precision coiling operations, combined with the consistent oil-tempered microstructure, ensure reliable performance in the most demanding spring applications. The enhanced quality control measures and stricter inspection criteria guarantee superior batch-to-batch consistency, making ASTM A229 Class II the preferred choice for manufacturers of high-reliability spring components where failure is not an option. -:- For detailed product information, please contact sales. -: ASTM A229 Oil-tempered Steel Wire, Class II Specification Dimensions Size： Diameter 20-1000 mm Length <4348 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 A229 Oil-tempered Steel Wire, Class II Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A229 Oil-tempered Steel Flange Flange, Class II -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A229 Oil-tempered Steel Flange Flange, Class II -:- For detailed product information, please contact sales. -:

Packing of ASTM A229 Oil-tempered 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 819 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