ASTM A570 Steel Flange, grade 33

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 A570 Steel Flange, grade 33 Product Information -:- For detailed product information, please contact sales. -: ASTM A570 Steel Flange, grade 33 Synonyms -:- For detailed product information, please contact sales. -:

ASTM A570 Steel, grade 33 Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A570 Grade 33 Steel** **ASTM A570 Grade 33** is a hot-rolled, carbon steel sheet and strip specifically designed for structural applications requiring a minimum yield strength of **33 ksi (230 MPa)**. As part of the economical A570 series, this grade offers an excellent balance between strength, formability, and cost-effectiveness, making it suitable for a wide range of fabricated structural components where moderate strength requirements must be met without compromising manufacturing efficiency. --- #### **1. International Standards & Grades** **Primary Standard:** **ASTM A570/A570M** - "Standard Specification for Steel, Sheet and Strip, Carbon, Hot-Rolled, Structural Quality" **Grade Classification:** - **Grade 33** [230 MPa] - Minimum yield strength 33 ksi - Other grades in A570 series: 30, 36, 40, 45, 50, 55 **International Equivalents:** - **EN 10025-2**: S235JR/S235J0 - **JIS G3101**: SS330 - **GB/T 700**: Q235 --- #### **2. Chemical Composition** The chemical composition requirements for ASTM A570 Grade 33: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.25 | | Manganese (Mn) | 0.90 | | Phosphorus (P) | 0.04 | | Sulfur (S) | 0.05 | | Silicon (Si) | 0.40 (optional) | **Key Composition Features:** - **Carbon Steel Base**: Simple and cost-effective chemical composition - **Controlled Carbon**: Optimized for weldability and formability - **Manganese Content**: Provides solid solution strengthening - **Optional Silicon**: Added as a deoxidizer when specified --- #### **3. Physical & Mechanical Properties** **Mechanical Properties:** | Property | Value | |---|---| | **Tensile Strength** | 450-520 MPa (65-75 ksi) | | **Yield Strength (min.)** | 230 MPa (33 ksi) | | **Elongation in 2" (min.)** | 20% | | **Elongation in 8" (min.)** | 23% | **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 (20-100°C) --- #### **4. Product Applications** **Building Construction:** - Structural framing members - Roof purlins and girts - Floor decking and formwork - Wall studs and bracing **Transportation Industry:** - Truck and trailer body panels - Automotive structural reinforcements - Railway car interior components - Vehicle underbody shields **Industrial Equipment:** - Machinery frames and bases - Equipment guards and covers - Conveyor system components - Storage rack uprights **Agricultural Applications:** - Tractor body panels - Implement frames and brackets - Grain handling equipment - Livestock equipment components **Commercial Products:** - Storage shelving and racks - Office furniture frames - Display fixture components - Industrial cabinet structures --- #### **5. Fabrication Characteristics** **Welding Performance:** - **Excellent Weldability**: Compatible with all common welding processes - **Preheat Requirements**: Not typically required for thicknesses up to 1 inch - **Recommended Processes**: GMAW (MIG), GTAW (TIG), SMAW (Stick) - **Filler Metals**: E60XX or E70XX series electrodes **Forming & Machining:** - **Cold Forming**: Excellent capability with standard press brake equipment - **Minimum Bend Radius**: 0.75t for 90° bends (t = material thickness) - **Machinability**: Good (approximately 65% of B1112 steel) - **Shearing & Punching**: Excellent performance with conventional tooling **Surface Characteristics:** - Standard hot-rolled surface finish with mill scale - Suitable for most painting and coating systems after proper surface preparation - Pickled and oiled finish available for improved paint adhesion **Heat Treatment:** - Supplied in as-rolled condition - Can be stress-relieved if required for specific applications - Annealing possible for enhanced formability in severe forming operations --- ### **Technical Summary** ASTM A570 Grade 33 represents an optimal choice for structural applications requiring moderate strength combined with excellent manufacturability. Its position between Grade 30 and Grade 36 in the A570 series makes it particularly suitable for applications where the slightly higher strength of Grade 33 provides design advantages while maintaining the cost benefits of carbon steel. The material's consistent mechanical properties and predictable behavior during fabrication ensure reliable performance in finished products. While it lacks the specialized properties of high-strength low-alloy steels, its economical nature and ease of processing make it ideal for high-volume structural components across multiple industries. The grade's versatility and reliable performance have established it as a mainstream material choice for general structural fabrication where weight reduction and cost control are important considerations. -:- For detailed product information, please contact sales. -: ASTM A570 Steel, grade 33 Specification Dimensions Size： Diameter 20-1000 mm Length <4293 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 A570 Steel, grade 33 Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A570 Steel Flange, grade 33 -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A570 Steel Flange, grade 33 -:- For detailed product information, please contact sales. -:

Packing of ASTM A570 Steel Flange, grade 33 -:- 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 764 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