AISI 50B40 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. -: AISI 50B40 Steel Flange Product Information -:- For detailed product information, please contact sales. -: AISI 50B40 Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AISI 50B40 Steel Product Information -:- For detailed product information, please contact sales. -: **Product Datasheet: AISI 50B40 Boron-Treated Alloy Steel** **1. Product Overview** AISI 50B40 is a **medium-carbon, boron-treated alloy steel** designed to achieve high strength and hardness through heat treatment, particularly quenching and tempering. The key characteristic is the addition of a small, controlled amount of boron (typically 0.0005% to 0.003%), which significantly increases the hardenability of the steel at a minimal cost increase compared to more heavily alloyed grades. This makes it a **cost-effective and high-performance** choice for high-strength, wear-resistant components. **2. Key International & Equivalent Standards** * **Primary Standard:** **SAE J404, J770** (SAE-AISI 50B40). The "B" denotes boron treatment. * **U.S. Standards:** **ASTM A29/A29M** (Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought), **ASTM A304** (for H-steel hardenability requirements). * **European (EU) Equivalents:** No direct equivalent; similar hardenability to some **Ck 45** or modified grades, but boron steels are less common in standard EN series. * **Japanese Equivalent:** Approximated by some SCM or SAC boron-containing steels. * **ISO Equivalent:** No direct single equivalent. **3. Chemical Composition (Weight % - Standard Ranges)** Composition is per SAE J404 specifications. The boron addition is the defining feature. Carbon is kept moderate to balance hardness with toughness. | Element | Minimum (%) | Maximum (%) | Typical Target (%) | Primary Function | | :--- | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.36 | 0.44 | 0.40 | Primary source of hardness and strength. | | **Manganese (Mn)** | 0.70 | 1.00 | 0.85 | Increases hardenability and strength. | | **Phosphorus (P)** | — | 0.035 | 0.020 | Residual element (impurity). | | **Sulfur (S)** | — | 0.040 | 0.025 | Improves machinability. | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | Deoxidizer, solid solution strengthener. | | **Boron (B)** | 0.0005 | 0.003 | 0.0015 | **Dramatically increases hardenability** by retarding ferrite formation at grain boundaries. | | **Residual Alloys (Cr, Ni, Mo etc.)** | Typically present in very low residual amounts unless specified. | **4. Physical & Mechanical Properties (Typical - After Quench & Tempering)** *Note: Properties are highly dependent on section size, quench medium, and tempering temperature.* * **Heat Treatment (Typical):** * **Austenitizing:** 830°C – 860°C (1525°F – 1580°F) * **Quenching:** Oil quench (good for sections up to ~75mm/3in due to high boron hardenability). * **Tempering:** 425°C – 650°C (800°F – 1200°F) depending on desired strength/toughness balance. * **Mechanical Properties (Example at 540°C / 1000°F Temper):** * **Tensile Strength:** 900 – 1100 MPa * **Yield Strength (0.2% Offset):** 750 – 950 MPa * **Elongation (in 50 mm):** 15% – 20% * **Reduction of Area:** 45% – 60% * **Hardness:** 28 – 35 HRC * **Properties at Lower Temper (e.g., 200°C / 400°F):** * **Hardness:** 50 – 55 HRC (High strength, lower toughness). * **Physical Constants:** * **Density:** ~7.85 g/cm³ * **Modulus of Elasticity:** ~205 GPa * **Machinability:** Fair in annealed condition. Boron can cause abrasive wear on tools. **5. Heat Treatment & Processing Notes** * **Forging:** Heat uniformly to 1150°C – 1200°C (2100°F – 2200°F). Finish above 850°C (1550°F). Slow cool after forging. * **Annealing:** Full anneal at 830°C – 860°C, slow furnace cool. Spheroidize annealing improves machinability for severe cold forming. * **Hardenability:** The boron effect provides hardenability equivalent to steels with higher levels of Cr, Ni, or Mo. This allows for through-hardening of larger sections with a milder quench (oil vs. water), reducing distortion and cracking risk. * **Weldability:** Poor. Preheating (200-315°C / 400-600°F) and post-weld stress relieving are mandatory due to high hardenability and risk of cold cracking. **6. Primary Applications** AISI 50B40 is used in applications requiring a good combination of high strength, toughness, and wear resistance at a competitive cost: * **Automotive:** Axle shafts, steering components (tie rods, pitman arms), torsion bars, high-strength bolts, brackets, and forged levers. * **Agricultural & Off-Highway:** Gears, shafts, plow beams, connecting rods, and other high-stress components. * **Industrial Machinery:** Hydraulic piston rods, cylinders, spindles, and general high-strength structural parts. * **Fasteners:** High-strength, heat-treated bolts and studs. **7. Key Advantages & Selection Rationale** * **High Hardenability at Low Cost:** Boron is a highly cost-effective hardenability enhancer, making 50B40 a substitute for more expensive alloy steels like 4140 or 4340 in many applications. * **Good Strength/Toughness Balance:** The moderate carbon content allows for a wide range of mechanical properties through tempering. * **Suitable for Larger Sections:** Can be through-hardened in oil for substantial cross-sections, reducing heat treatment complexity. * **Material Efficiency:** Allows designers to use lower alloy content to achieve performance goals, optimizing material cost. --- **Disclaimer:** This data sheet provides typical information. The effectiveness of boron is highly sensitive to processing; optimal nitrogen levels must be controlled (often with Ti or Al additions) to protect boron. For critical applications, material should be ordered to hardenability (H-band) specifications per ASTM A304. Final properties are determined by the specific heat treatment practice and part geometry. -:- For detailed product information, please contact sales. -: AISI 50B40 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4093 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. -: AISI 50B40 Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 50B40 Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 50B40 Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AISI 50B40 Steel Flange -:- 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 564 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