AISI 50B40H 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 50B40H Steel Flange Product Information -:- For detailed product information, please contact sales. -: AISI 50B40H Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AISI 50B40H Steel Product Information -:- For detailed product information, please contact sales. -: **Product Datasheet: AISI 50B40H Boron-Treated Hardenability Steel** --- ### **1. Product Overview** AISI 50B40H is a **medium-carbon, boron-treated alloy steel produced to specific hardenability bands**, designated by the **"H" suffix**. This steel is engineered to achieve consistent through-hardening characteristics across production batches, making it ideal for **high-strength, critical components** where predictable heat treatment response is essential. The controlled addition of boron provides exceptional hardenability at a lower alloy cost compared to conventional chromium-molybdenum steels, offering excellent value for demanding applications. --- ### **2. Key International & Equivalent Standards** - **Primary Standard:** **SAE J404, J412, J770** (SAE-AISI 50B40H) - **Hardenability Specification:** **ASTM A304** – Standard Specification for Steel Bars, Alloy, Subject to End-Quench Hardenability Requirements - **Bar Stock Standard:** **ASTM A29/A29M** – Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought - **European Equivalents:** No direct equivalent; functionally similar to **34CrB4 (1.7321)** with modified composition for hardenability control. - **Japanese Equivalent:** Approximated by **SCr440H-B** or similar boron-treated variants under JIS G4052. - **ISO Reference:** ISO 683-1:2016 (Thermomechanical processed steels) – Similar to Type 34CrB4 with H-band controls. --- ### **3. Chemical Composition (Weight % - ASTM A304 H-Steel Ranges)** The composition is controlled to ensure the steel meets specified hardenability bands rather than strict chemical limits alone. Typical ladle analysis ranges are: | Element | Minimum (%) | Maximum (%) | Typical Target (%) | Primary Function | | :--- | :--- | :--- | :--- | :--- | | **Carbon (C)** | 0.36 | 0.44 | 0.40 | Primary strength and hardness contributor. | | **Manganese (Mn)** | 0.70 | 1.00 | 0.85 | Enhances hardenability and strength. | | **Phosphorus (P)** | — | 0.035 | 0.020 | Residual element (controlled impurity). | | **Sulfur (S)** | — | 0.040 | 0.025 | Improves machinability (forms MnS inclusions). | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | Deoxidizer, solid solution strengthening. | | **Boron (B)** | 0.0005 | 0.003 | 0.0015 | **Powerful hardenability enhancer**; maximizes depth of hardening. | | **Residual Alloys (Cr, Ni, Mo)** | Usually ≤ 0.35% combined unless specified. | | | | **Note:** For H-steels, the actual chemical composition may vary within the above ranges to guarantee the hardenability band is met. The **End-Quench Hardenability Test (Jominy Test)** is the primary acceptance criterion. --- ### **4. Hardenability & Mechanical Properties** #### **Hardenability (Per ASTM A255/Jominy Test):** - The **"H" designation** guarantees the distance from the quenched end to achieve a specified hardness (e.g., 40 HRC) falls within a published band. This ensures uniform response to heat treatment in production. - Typical Jominy curve shows high hardenability; 40 HRC may be maintained up to **J20–J30 (20–30 mm from quenched end)** or further, depending on the specific heat and grain size. #### **Mechanical Properties (After Quench & Temper – Typical):** *Properties vary with section size and tempering temperature.* - **Typical Heat Treatment:** - **Austenitizing:** 830°C – 860°C (1525°F – 1580°F) - **Quenching:** **Oil quench** (effective for sections up to ~100 mm/4 in diameter due to boron effect) - **Tempering:** 425°C – 650°C (800°F – 1200°F) for optimized toughness/strength balance. - **Example Properties (Tempered at 540°C / 1000°F):** - **Tensile Strength:** 850 – 1050 MPa - **Yield Strength (0.2% Offset):** 700 – 900 MPa - **Elongation (in 50 mm):** ≥ 16% - **Reduction of Area:** ≥ 50% - **Hardness:** 28 – 34 HRC - **High-Strength Condition (Low-Temperature Temper ~200°C / 400°F):** - **Hardness:** 48 – 53 HRC - **Tensile Strength:** 1550 – 1750 MPa - **Physical Constants:** - **Density:** ~7.85 g/cm³ - **Modulus of Elasticity:** ~205 GPa - **Thermal Conductivity:** ~45 W/m·K (at 100°C) --- ### **5. Heat Treatment & Processing Characteristics** - **Forging:** Heat 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, furnace cool. Spheroidize annealing is recommended for best machinability. - **Boron Effectiveness:** Boron significantly boosts hardenability but requires **protection from nitrogen** (often via small Al/Ti additions) to form effective BN. - **Weldability:** **Poor** due to high hardenability. Requires preheat (200–315°C / 400–600°F) and post-weld tempering to avoid hydrogen-induced cracking. - **Machinability:** Fair in annealed condition (~187–229 HB). Boron can increase tool wear; proper tool geometry and coolant are recommended. --- ### **6. Primary Applications** AISI 50B40H is selected for **high-stress, safety-critical components** requiring predictable and uniform hardening in mass production: - **Automotive & Truck:** **Axle shafts**, steering knuckles, torsion bars, crankshafts, high-strength connecting rods, and suspension components. - **Agricultural & Construction:** Gears, heavy-duty shafts, track pins, hydraulic cylinder rods, and pivot pins. - **Industrial Machinery:** Large bolts, studs, spindles, and drivetrain components subject to high torsional/bending loads. - **Oil & Gas:** Non-critical fasteners and machinery parts requiring good strength-to-cost ratio. --- ### **7. Key Advantages & Selection Rationale** - **Predictable Performance:** The **H-band guarantee** ensures consistent depth of hardening and mechanical properties across lots, reducing heat treatment variability in production. - **Cost-Effective Hardenability:** Boron provides hardenability comparable to higher-alloy steels (e.g., 4140H, 4340H) at a significantly lower material cost. - **Design Flexibility:** Suitable for larger cross-sections where through-hardening is required with minimal distortion (oil quench sufficient). - **Quality Assurance:** Supplied with certified hardenability data, providing engineers with reliable data for design and process validation. --- ### **Disclaimer** This datasheet provides general information per industry standards. For critical applications, material must be sourced to **ASTM A304 H-band requirements** with certified mill test reports. Final mechanical properties are dependent on the component's geometry, heat treatment process parameters (quench severity, tempering cycle), and machining operations. Weld procedures must be rigorously qualified. -:- For detailed product information, please contact sales. -: AISI 50B40H Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4094 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 50B40H Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 50B40H Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 50B40H Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AISI 50B40H 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 565 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