Niagara LaSalle Fatigue-Proof® Cold Finished 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. -: Niagara LaSalle Fatigue-Proof® Cold Finished Steel Flange Bar Product Information -:- For detailed product information, please contact sales. -: Niagara LaSalle Fatigue-Proof® Cold Finished Steel Flange Bar Synonyms -:- For detailed product information, please contact sales. -:

Niagara LaSalle Fatigue-Proof® Cold Finished Steel Bar Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Niagara LaSalle Fatigue-Proof® Cold Finished Steel Bar** **Fatigue-Proof®** is a registered trademark and proprietary high-strength steel bar product developed by **Niagara LaSalle Corporation**. It is an **alloy steel bar processed through cold drawing and thermal treatment** to achieve an exceptional combination of ultra-high yield strength, excellent fatigue resistance, and good machinability **in the as-supplied condition, without quenching & tempering heat treatment**. This material is engineered for highly stressed, dynamically loaded components where resistance to fatigue failure is paramount. It occupies a unique position in the material spectrum, offering strength levels comparable to heat-treated alloy steels (like 4140 QT) but with the dimensional stability, straightness, and machinability of a cold-finished product. The name "Fatigue-Proof" is derived from its superior endurance limit relative to its tensile strength. --- ## **1. Chemical Composition (Proprietary)** Fatigue-Proof® is based on a specific, controlled alloy steel chemistry designed to develop high strength through cold work and precipitation hardening during its proprietary thermal-mechanical processing. Its composition is distinct from standard carbon steels. A typical analysis is as follows (in weight %): | Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | 0.40 - 0.50 | 1.20 - 1.60 | 1.35 - 1.80 | 0.40 - 0.80 | 0.08 - 0.18 | 0.040 - 0.070 | | **Role** | Core Strength | Hardenability & Strength | **Primary Strengthener**, raises endurance limit | Hardenability & Wear | Enhances Hardenability & Toughness | Machinability | **Critical Features of the Composition & Process:** * **High Silicon (Si):** This is the signature element. Silicon is a potent ferrite strengthener that significantly **raises the endurance (fatigue) limit** and contributes to the high yield strength achieved without traditional martensitic hardening. * **Balanced Alloying (Cr, Mo):** These elements enhance hardenability during the proprietary thermal cycle, contributing to the through-section strength uniformity and toughness. * **Controlled Sulfur (S):** Added to form manganese sulfides, which act as chip breakers, granting Fatigue-Proof® **surprisingly good machinability (approx. 75% of B1112)** for its very high strength level. * **Proprietary Processing:** The specific sequence of cold drawing and controlled thermal treatment induces a fine-grained, heavily strain-hardened microstructure with precipitated carbides, resulting in its unique property set. --- ## **2. Physical & Mechanical Properties (Typical)** Fatigue-Proof® is defined by its guaranteed minimum mechanical properties, which are exceptionally high for an as-delivered, machinable bar. | Property | **Guaranteed Minimum / Typical Value** | **Engineering Significance** | | :--- | :--- | :--- | | **Yield Strength (0.2% Offset)** | **125,000 psi (862 MPa)** | **Exceptionally high yield strength**, exceeding that of many quenched & tempered steels, providing a large margin against plastic deformation. | | **Tensile Strength** | 140,000 psi (965 MPa) | | | **Elongation (in 2")** | 12% | Maintains useful ductility despite ultra-high strength. | | **Reduction of Area** | 40% | | | **Endurance Limit** | **~65,000 - 70,000 psi** (Smooth specimen) | **Key Benefit:** A very high fatigue strength-to-tensile strength ratio (~0.5), leading to the "Fatigue-Proof" performance in cyclic loading. | | **Machinability Rating** | **75% (vs. B1112/1212)** | Outstanding for its strength level, allowing for productive machining. | | **Surface Hardness** | **HRC 30 - 36** (Typical range) | Provides inherent wear resistance. | | **Core Hardness** | Uniform throughout cross-section. | No soft core, unlike case-hardened parts. | | **Straightness & Finish** | Excellent as-drawn straightness; Good surface finish. | Reduces pre-machining preparation and ensures part accuracy. | --- ## **3. Product Applications** Fatigue-Proof® is specified for **safety-critical, highly stressed components** subject to dynamic loads, vibration, and cyclic stresses where fatigue failure is a primary design concern. * **Aerospace & Defense:** **Landing gear components, actuator shafts, flight control linkages, and missile parts.** * **High-Performance Automotive:** **Racing crankshafts, connecting rods, suspension components (tie rods, spindles), and high-stress fasteners.** * **Oil & Gas / Hydraulics:** **Valve bodies, pump shafts, hydraulic piston rods, and fittings** for high-pressure systems. * **Printing & Packaging Machinery:** **Heavily loaded cam shafts, drive shafts, and actuator arms.** * **General High-Stress Components:** **Studs, pins, gears, and levers** in applications where weight savings and reliability under cyclic load are critical. --- ## **4. International & Equivalent Standards** As a **proprietary brand with a unique chemistry/process combination**, there is no direct, universally equivalent standard grade. It is a specialist material that stands apart. | Standard System | Comparable Material / Note | **Key Difference** | | :--- | :--- | :--- | | **Proprietary** | **Niagara LaSalle Fatigue-Proof®** | The only source for this specific material with guaranteed properties. | | **ASTM A311** | Class D (Cold-Drawn, Stress-Relieved Alloy) | A similar *category*, but Fatigue-Proof® has a unique Si-Cr-Mo chemistry and higher guaranteed properties. | | **SAE/AISI** | **Modified 4140/4142 (QT)** | To achieve similar strength (140-150 ksi TS), 4140 requires full quenching & tempering, resulting in lower machinability, potential distortion, and decarburization. Fatigue-Proof® provides it "as-is." | | **SAE/AISI** | 4340 (QT) | An even higher-strength alloy steel, but again, requires heat treatment with all its associated complexities and costs. | | **DIN (EN)** | 1.7176 (50CrMo4) or similar | May approximate the Cr-Mo base, but lacks the high Silicon and the proprietary processing. | **Crucial Note:** Fatigue-Proof® is often the **performance benchmark**. Engineers may use standard alloy steels (like 4140 QT) to *approach* its properties, but specifying "Fatigue-Proof®" ensures the guaranteed high yield strength, fatigue limit, and machinability in the as-supplied form. --- ## **5. Key Advantages & Considerations** **Advantages:** * **Ultra-High Strength, No Heat Treat:** Eliminates the cost, time, distortion, and scaling associated with quenching & tempering. * **Superior Fatigue Resistance:** The high endurance limit is its defining characteristic, ideal for components with infinite life design goals. * **Excellent Machinability:** Remarkably good for its strength, enabling complex part machining with good tool life. * **Uniform Properties & Stability:** Homogeneous properties through the cross-section and excellent dimensional stability during machining. **Considerations:** * **Premium Cost:** Significantly more expensive than standard carbon or alloy steel bars due to its specialized chemistry and processing. * **Limited Weldability:** **Not recommended for welding.** The high silicon and carbon content, combined with the cold-worked structure, make it highly susceptible to cracking. * **Temperature Limitation:** Like all cold-worked steels, its properties will begin to degrade if exposed to temperatures above approximately **400°F (204°C)** for prolonged periods. * **Proprietary Source:** Solely available from Niagara LaSalle and its authorized distributors. --- **Disclaimer:** The information pertains to the standard Fatigue-Proof® grade. For engineering design of critical components, it is essential to consult the **latest official Niagara LaSalle Fatigue-Proof® technical data sheets** and engage with their application engineering team. Properties are guaranteed in the longitudinal direction; designers should account for anisotropic behavior in transverse loading. -:- For detailed product information, please contact sales. -: Niagara LaSalle Fatigue-Proof® Cold Finished Steel Bar Specification Dimensions Size： Diameter 20-1000 mm Length <5068 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. -: Niagara LaSalle Fatigue-Proof® Cold Finished Steel Bar Properties -:- For detailed product information, please contact sales. -:

Applications of Niagara LaSalle Fatigue-Proof® Cold Finished Steel Flange Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers Niagara LaSalle Fatigue-Proof® Cold Finished Steel Flange Bar -:- For detailed product information, please contact sales. -:

Packing of Niagara LaSalle Fatigue-Proof® Cold Finished Steel Flange Bar -:- 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 1539 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