AISI 50B44 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 50B44 Steel Flange Product Information -:- For detailed product information, please contact sales. -: AISI 50B44 Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

AISI 50B44 Steel Product Information -:- For detailed product information, please contact sales. -: **Product Datasheet: AISI 50B44 Medium-Carbon Boron Steel** --- ## **1. Product Overview** AISI 50B44 is a **medium-carbon boron-treated alloy steel** engineered to provide an optimal balance of strength, toughness, and hardenability. The controlled addition of boron (typically 0.0005–0.003%) significantly enhances the steel's ability to harden deeply, allowing it to achieve mechanical properties comparable to more heavily alloyed steels, but at a **lower material cost**. It is commonly supplied in the hot-rolled, annealed, or normalized condition and is intended for heat treatment (quenching and tempering) to achieve its final properties. --- ## **2. Key International & Equivalent Standards** | Region/Standard | Equivalent Designation | Key Standard Reference | |----------------|------------------------|------------------------| | **USA** | **SAE/AISI 50B44** | SAE J404, J412, J770 | | | **ASTM A29/A29M** | Standard Grades (Bar Stock) | | **Europe** | Similar to **1.7014 (22MnB4)** adjusted for carbon content | DIN/EN Standard (approx.) | | **Japan** | No direct equivalent; functionally similar to some **SCr or SCM boron steels** | JIS G4053 (approx.) | | **ISO** | Similar to **Type 44B2** in ISO 683-1 (Heat-treatable steels) | ISO 683-1 | *Note: Boron steels often have national/regional specific designations without perfect global 1:1 equivalents.* --- ## **3. Chemical Composition (Weight %, Typical Ladle Analysis)** | Element | Minimum | Maximum | Typical | Role & Effect | |---------|---------|---------|---------|---------------| | **Carbon (C)** | 0.42 | 0.49 | 0.44 | Primary strength & hardness; forms martensite on quenching. | | **Manganese (Mn)** | 0.75 | 1.00 | 0.85 | Increases hardenability, solid solution strengthening. | | **Phosphorus (P)** | — | ≤ 0.035 | 0.020 | Residual (controlled impurity). | | **Sulfur (S)** | — | ≤ 0.040 | 0.025 | Improves machinability. | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | Deoxidizer, strength enhancement. | | **Boron (B)** | 0.0005 | 0.003 | 0.0015 | **Powerful hardenability enhancer**; segregates to grain boundaries to delay ferrite formation. | | **Chromium (Cr)** | — | ≤ 0.35 (residual) | 0.20 | Residual, minor hardenability contribution. | | **Nickel (Ni)** | — | ≤ 0.35 (residual) | 0.15 | Residual. | *The “B” in 50B44 specifically indicates intentional boron addition for hardenability.* --- ## **4. Physical & Mechanical Properties** ### **As-Supplied Condition (Annealed/Normalized)** - **Hardness:** 187–229 HB - **Tensile Strength:** ~ 620–750 MPa - **Yield Strength:** ~ 415 MPa min - **Elongation:** ~ 20% (in 50 mm) - **Machinability:** Fair to good (~60–65% of 1212 steel standard). ### **After Quench & Temper (Oil Quenched from ~850°C, Tempered at 540°C/1000°F)** - **Hardness:** 28–34 HRC - **Tensile Strength:** 900–1100 MPa - **Yield Strength (0.2% Offset):** 750–950 MPa - **Elongation:** ≥ 16% - **Reduction of Area:** ≥ 50% ### **High-Strength Condition (Low-Temperature Tempered, e.g., 200°C/400°F)** - **Hardness:** 50–55 HRC - **Tensile Strength:** 1650–1850 MPa - **Impact Toughness:** Moderate; adequate for many high-strength applications. ### **Physical Constants** - **Density:** 7.85 g/cm³ - **Modulus of Elasticity:** 205 GPa - **Thermal Conductivity:** ~ 46 W/m·K (at 100°C) --- ## **5. Heat Treatment Guidelines** | Process | Temperature Range | Notes | |---------|------------------|-------| | **Annealing** | 830–860°C (1525–1580°F), slow cool | For machinability & cold work preparation. | | **Normalizing** | 870–900°C (1600–1650°F), air cool | Refines grain structure after forging. | | **Austenitizing (Hardening)** | 830–860°C (1525–1580°F) | Preheat sections >50 mm to avoid cracking. | | **Quenching** | Oil quench recommended | Boron allows through-hardening of sections up to ~75 mm in oil. | | **Tempering** | 200–650°C (400–1200°F) | Adjust for desired strength/toughness balance. Immediate tempering required after quenching. | --- ## **6. Primary Applications** AISI 50B44 is widely used in **medium-to-heavy duty components** requiring high strength, good fatigue resistance, and wear resistance, especially where cost efficiency is critical: - **Automotive & Truck:** Axle shafts, torsion bars, steering components, gear blanks, high-strength bolts. - **Agricultural Machinery:** Gears, shafts, plow beams, pivot pins, harrow teeth. - **General Engineering:** Hydraulic piston rods, spindles, couplings, rollers, and machinery parts subject to high static/dynamic loads. - **Fasteners:** Grade 10.9 and higher bolts, studs, and special fasteners after proper heat treatment. --- ## **7. Key Advantages** - **Cost-Performance Leader:** Achieves high hardenability and strength with minimal alloy content (boron effect). - **Good Through-Hardening:** Suitable for larger sections where uniform properties are required. - **Versatile Heat Treatment Response:** Can be tailored for high hardness/wear or toughened for impact-loaded parts. - **Machinable in Annealed State:** Facilitates near-net shape manufacturing before final heat treatment. --- ## **8. Important Notes & Limitations** - **Weldability:** Generally poor; preheating (200–315°C) and post-weld tempering are essential to avoid hydrogen cracking. - **Boron Sensitivity:** Effective boron requires protection from nitrogen (often via Al/Ti additions); consistent hardenability depends on steelmaking controls. - **Notch Sensitivity:** High-strength conditions may increase sensitivity to sharp notches; proper fillet design and surface finish are important. - **Distortion Control:** As with all through-hardening steels, careful quenching practices (e.g., oil quenching, martempering) help minimize distortion. --- **Disclaimer:** The information provided is typical and based on industry standards. For specific applications, material should be ordered to applicable ASTM/SAE specifications with agreed-upon chemical or hardenability limits. Final properties are dependent on exact heat treatment parameters, part geometry, and manufacturing history. Engineering validation under actual service conditions is recommended. -:- For detailed product information, please contact sales. -: AISI 50B44 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4095 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 50B44 Steel Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 50B44 Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 50B44 Steel Flange -:- For detailed product information, please contact sales. -:

Packing of AISI 50B44 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 566 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