Bethlehem Steel Flange ASTM A633, Steel Flange

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. -: Bethlehem Steel Flange ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Flange plate Product Information -:- For detailed product information, please contact sales. -: Bethlehem Steel Flange ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Flange plate Synonyms -:- For detailed product information, please contact sales. -:

Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Product Information -:- For detailed product information, please contact sales. -: ## **Product Specification: Bethlehem Steel ASTM A633 Grade A Normalized High-Strength Low-Alloy Steel Plate (3/16" to 2-1/2" Thick)** **Product Overview** Bethlehem Steel ASTM A633 Grade A is a normalized high-strength low-alloy (HSLA) structural steel plate designed for applications requiring enhanced notch toughness at lower temperatures. As part of the A633 specification, Grade A provides a minimum yield strength of 42 ksi (290 MPa) with guaranteed impact properties, making it superior to standard structural grades like A36 in applications involving dynamic loading or service in cold environments. Supplied in the normalized condition for thicknesses from 3/16 inch (4.8 mm) to 2-1/2 inches (63.5 mm), this steel offers an excellent balance of strength, weldability, and verified toughness, particularly suited for welded structures operating under demanding conditions. **International Standard Compliance** * **Primary Standard:** **ASTM A633 / A633M** - Standard Specification for Normalized High-Strength Low-Alloy Structural Steel Plates * **Grade Designation:** Grade A * **International Equivalents:** * **EN Standard:** EN 10025-3 S275N or S275NL (Normalized/Normalized rolled weldable fine grain structural steels) * **ISO Standard:** ISO 630-2 E275B (Non-alloy quality structural steel) * **JIS Standard:** G3106 SM400A or SM400B (General structural rolled steel) * **Related Specifications:** ASME SA633 (for pressure vessel applications) * **Certification:** Typically supplied with full traceability; suitable for CE marking under Construction Products Regulation **Chemical Composition (Heat Analysis, Weight %)** The composition is controlled to produce fine grain structure and achieve specified mechanical properties after normalizing heat treatment. | Element | ASTM A633 Grade A Requirement | Typical Bethlehem Practice | Functional Purpose | |---------|-------------------------------|----------------------------|-------------------| | Carbon (C) | 0.18% max | 0.10-0.16% | Base strength element, controlled for weldability | | Manganese (Mn) | 1.00-1.35% | 1.10-1.30% | Primary strengthening element, improves hardenability | | Phosphorus (P) | 0.035% max | 0.010-0.020% | Controlled impurity, minimized for toughness | | Sulfur (S) | 0.040% max | 0.005-0.015% | Controlled impurity, minimized for weldability | | Silicon (Si) | 0.15-0.50% | 0.20-0.40% | Deoxidizer, solid solution strengthener | | Copper (Cu) | 0.20% min (when specified) | 0.20-0.35% | Optional for corrosion resistance | | Vanadium (V) | 0.05% max | 0.02-0.04% (optional) | Grain refinement, precipitation strengthening | | Columbium (Cb/Nb) | 0.05% max | 0.01-0.03% (optional) | Grain refinement, precipitation strengthening | | Aluminum (Al) | 0.01-0.05% (when specified) | 0.020-0.040% | Grain refiner (fine grain practice) | | **Carbon Equivalent (CE IIW)** | **0.40 max** | **0.30-0.38** | CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 | *Note: A633 Grade A is typically produced with fine grain practice using aluminum or other grain-refining elements.* **Physical & Mechanical Properties** **1. Standard Mechanical Properties (After Normalizing):** - **Yield Strength (min):** 42 ksi (290 MPa) - **Tensile Strength:** 63-85 ksi (435-585 MPa) - **Yield-to-Tensile Ratio:** 0.60-0.70 - **Elongation in 2" (min):** 23% - **Elongation in 8" (min):** 21% - **Reduction of Area (typical):** 50-60% **2. Impact Properties (Key Differentiator):** - **Charpy V-Notch Requirements:** Mandatory testing specified by purchaser - **Typical Test Conditions:** 15-20 ft-lb (20-27 J) at -50°F (-46°C) to +70°F (+21°C) - **Test Temperatures Available:** +70°F (+21°C), 0°F (-18°C), -30°F (-34°C), -50°F (-46°C) - **Typical Performance:** 40-60 ft-lb (54-81 J) at 0°F (-18°C) **3. Physical Constants:** - **Density:** 0.284 lb/in³ (7.85 g/cm³) - **Modulus of Elasticity:** 29,000 ksi (200 GPa) - **Shear Modulus:** 11,500 ksi (79 GPa) - **Poisson's Ratio:** 0.29 - **Coefficient of Thermal Expansion:** 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C) from 68-212°F - **Thermal Conductivity:** 28.0 BTU·in/(hr·ft²·°F) at 212°F - **Specific Heat:** 0.11 BTU/(lb·°F) **4. Technological Properties:** - **Weldability:** Excellent (AWS D1.1 Group I comparable) - **Carbon Equivalent:** 0.30-0.38 (very favorable for welding) - **Preheat Requirements:** Generally not required for thicknesses < 1" under normal conditions - **Machinability:** 70% of B1112 (good) - **Formability:** Excellent; minimum bend radius of 1.5t for 90° bending - **Flame Cutting:** Excellent performance with minimal hard zone formation **5. Microstructural Characteristics:** - **Grain Size:** ASTM 5-8 (fine grain practice) - **Microstructure:** Ferrite-pearlite with possible bainitic transformation products - **Inclusion Control:** Typically produced to moderate cleanliness standards **Product Applications** **1. Structural Engineering:** - Bridge components in cold climates - Building frames for high-rise structures - Transmission towers and utility structures - Crane runway girders and support structures **2. Heavy Equipment & Machinery:** - Excavator and crane components - Mining equipment structural members - Agricultural machinery frames - Material handling equipment **3. Transportation:** - Railroad car components - Truck chassis and trailer frames - Heavy transport equipment **4. Industrial Applications:** - Pressure vessel supports (non-pressure parts) - Industrial platform and walkway structures - Storage tank supports - Power plant structural components **5. Cold Climate Applications:** - Arctic and subarctic structures - Cold storage facility structures - Winterized industrial equipment - Ice-breaking vessel components (non-hull) **Normalizing Heat Treatment Process** The normalized condition is essential for achieving the specified properties: 1. **Heating:** Uniform heating to 1600-1700°F (870-925°C) 2. **Soaking:** Holding at temperature to achieve uniform austenitization 3. **Cooling:** Still-air cooling to room temperature 4. **Result:** Refined grain structure, uniform microstructure, improved toughness **Manufacturing & Processing Characteristics** **1. Available Conditions:** - **Normalized:** Standard delivery condition (required by specification) - **As-Rolled:** Not permitted for A633 Grade A - **Stress Relieved:** Available when specified **2. Dimensional Tolerances:** - **Thickness Tolerance:** Per ASTM A6/A6M for normalized plates - **Width Range:** Up to 150 inches - **Length Range:** Up to 600 inches - **Flatness:** Commercial or structural quality **3. Quality Assurance:** - **Mandatory Testing:** Tensile and Charpy impact tests per heat - **Optional Testing:** Ultrasonic testing per ASTM A435/A435M - **Grain Size Testing:** Typically verified per ASTM E112 - **Documentation:** Full traceability with heat number and test reports **4. Processing Recommendations:** - **Cutting:** All thermal cutting methods suitable - **Forming:** Excellent cold forming characteristics - **Welding:** All common processes suitable with matching filler metals - **Heat Treatment:** Avoid post-fabrication heating above 1150°F (620°C) **Comparative Advantages** 1. **Superior Toughness:** Verified impact properties exceed standard structural grades 2. **Excellent Weldability:** Low carbon equivalent facilitates welding without extensive precautions 3. **Uniform Properties:** Normalizing ensures consistent properties through thickness 4. **Good Strength-Ductility Balance:** Higher strength than A36 with maintained formability 5. **Cold Temperature Performance:** Specifically designed for low-temperature service 6. **Code Acceptance:** Widely recognized in structural and pressure vessel codes **Technical Considerations** 1. **Thickness Limitations:** Standard properties guaranteed only to 2-1/2" thickness 2. **Heat Treatment Required:** Must be supplied in normalized condition 3. **Cost Premium:** Higher cost than as-rolled structural grades due to heat treatment 4. **Lead Time:** Longer delivery times possible due to heat treatment requirements **Procurement Specifications** When ordering A633 Grade A, specify: - ASTM A633 Grade A - Thickness, width, and length requirements - Charpy test temperature and energy requirements - Additional testing requirements (UT, MT, etc.) - Heat treatment verification requirements - Certification requirements (EN 10204 3.1 or 3.2) - Marking and packaging instructions **Design Advantages** 1. **Weight Savings:** Higher strength allows lighter structures than A36 2. **Improved Safety:** Verified toughness reduces brittle fracture risk 3. **Fabrication Efficiency:** Excellent weldability reduces fabrication costs 4. **Long-Term Reliability:** Normalized structure provides stability over time 5. **Versatility:** Suitable for wide range of structural applications **Disclaimer** This product information is based on ASTM specifications and historical industry data. Actual properties may vary by manufacturer and heat lot. For critical applications, always consult certified mill test reports and conduct appropriate engineering evaluations. Bethlehem Steel Corporation historical data is referenced for informational purposes; current producers may have different manufacturing practices while meeting ASTM A633 Grade A requirements. Always adhere to applicable codes and standards for design, fabrication, and installation. -:- For detailed product information, please contact sales. -: Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Specification Dimensions Size： Diameter 20-1000 mm Length <4644 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. -: Bethlehem Steel ASTM A633 Grade A 3/16 to 2-1/2 in. thick, steel plate Properties -:- For detailed product information, please contact sales. -:

Applications of Bethlehem Steel Flange ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Flange plate -:- For detailed product information, please contact sales. -: Chemical Identifiers Bethlehem Steel Flange ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Flange plate -:- For detailed product information, please contact sales. -:

Packing of Bethlehem Steel Flange ASTM A633 Grade A 3/16 to 2-1/2 in. thick, Steel Flange plate -:- 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 1115 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