100CrMnSi6-4 837S 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. -: Ovako 100CrMnSi6-4 837S Steel Flange Product Information -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi6-4 837S Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100CrMnSi6-4 837S Steel Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100CrMnSi6-4 837S Steel** ## **Product Overview** Ovako 100CrMnSi6-4 837S is a **premium-grade, silicon-enhanced bearing steel** engineered for applications demanding **exceptional micro-cleanliness, homogeneity, and fatigue performance**. This alloy represents a high-quality variant within the 100CrMnSi6-4 family, where the **"S"** suffix denotes **Superior or Special quality**, characterized by stringent control over non-metallic inclusions, reduced segregation, and optimized processing. With its balanced chromium, manganese, and elevated silicon content, this steel delivers a superior combination of **high strength, excellent toughness, and outstanding rolling contact fatigue life** compared to standard bearing steels, making it ideal for the most critical and heavily loaded components. ## **Key Features & Benefits** * **Superior Micro-Cleanliness & Fatigue Performance:** The "S" quality grade ensures **extremely low levels of oxides and sulfides**, significantly reducing stress concentration sites that initiate fatigue cracks. This results in **exceptional and predictable Rolling Contact Fatigue (RCF) life** with minimal statistical scatter, providing maximum reliability for bearing applications. * **Enhanced Strength-Toughness Synergy:** The elevated silicon content (typically 0.5-0.7%) provides potent solid solution strengthening of the matrix, leading to **higher tensile and yield strength at equivalent hardness levels**. Simultaneously, silicon improves toughness by suppressing the formation of brittle cementite, creating an optimal balance for high-stress applications. * **Excellent Temper Resistance & Dimensional Stability:** Silicon markedly increases resistance to softening during tempering, allowing components to **retain hardness at elevated operating temperatures** or enabling higher tempering temperatures to improve toughness without compromising performance. The clean, homogeneous structure also promotes excellent dimensional stability during heat treatment. * **Consistent and Predictable Hardenability:** The controlled chemistry and homogeneous microstructure of the 837S grade ensure uniform and predictable response to heat treatment, guaranteeing **consistent through-hardness and mechanical properties** in the final component, batch after batch. * **Ideal for Demanding and Safety-Critical Applications:** This material is specifically designed for components where failure is not an option, offering an extra margin of safety and performance in aerospace, energy, high-performance automotive, and advanced industrial machinery. ## **International Standards & Designations** This is a premium quality variant of a standardized silicon-bearing steel. | Region/Standard | Standard Designation | Common Name / Equivalent | | :--- | :--- | :--- | | **EUR (EN)** | **1.3538** (or similar) | Base material standard. The "S" quality exceeds standard requirements. | | **ISO** | **ISO 683-17: 100CrMnSi6-4** | Recognized variant. | | **Germany (DIN / W-Nr.)** | **100CrMnSi6-4 / ~1.3538** + special quality designations (e.g., EP) | | | **Ovako Designation** | **837S** | **"837"** correlates with the base material number; **"S"** denotes **Superior/Special quality** with enhanced cleanliness and consistency. | ## **Chemical Composition (Typical - %)** The composition is tightly controlled to achieve the "S" grade performance. | Element | Content (%) | Role & Quality Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.95 - 1.10 | Basis for hardness. Tight control ensures consistency. | | **Chromium (Cr)** | 1.40 - 1.70 | Enhances hardenability and wear resistance. | | **Manganese (Mn)** | 0.60 - 1.00 | Increases hardenability. | | **Silicon (Si)** | **0.50 - 0.70** | **Key element.** Provides solid solution strengthening and tempering resistance. | | **Sulfur (S)** | **≤ 0.003** | **Extremely low.** Hallmark of "S" quality. Minimizes MnS inclusions to maximize fatigue life and transverse toughness. | | **Phosphorus (P)** | **≤ 0.012** | Kept at ultra-low levels. | | **Oxygen [O]** | **< 10 ppm** | Very low total oxygen content to minimize oxide inclusions. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (After Optimal Heat Treatment)** * **Hardness (Hardened & Tempered):** **60 - 64 HRC** (Typical aim: 61-62 HRC for bearings) * **Ultimate Tensile Strength (UTS):** **2050 - 2350 MPa** * **Yield Strength (0.2% offset):** **1650 - 1950 MPa** * **Fracture Toughness (KIC):** **Good to Very Good**, improved over standard grades due to Si and cleanliness. * **Impact Toughness (Charpy V-notch):** Typically superior to standard 100Cr6 at equivalent hardness. * **Rolling Contact Fatigue Life (L10):** **Excellent.** Demonstrates one of the highest achievable lives for through-hardened bearing steels, with a very narrow scatter band. ## **Typical Applications** This premium material is specified for the most critical components across advanced industries. * **Aerospace & Defense Bearings:** Main shaft bearings for jet engines, critical bearings in flight control systems, and helicopter transmissions. * **High-Performance Automotive Racing Components:** Bearings and transmission gears in Formula 1, endurance racing, and high-end supercars. * **Critical Wind Turbine Components:** Main shaft and gearbox bearings for multi-megawatt offshore turbines where reliability and longevity are paramount. * **Precision Machine Tool Spindles:** High-speed and high-stiffness spindles for grinding and milling machines. * **Advanced Medical & Scientific Equipment:** Bearings in MRI scanners, high-speed centrifuges, and precision instruments. ## **Processing Guidelines** * **Supply Condition:** Typically supplied in a **soft-annealed or spheroidize annealed condition** (~200 HB) for machining. * **Heat Treatment (Customer Process):** 1. **Austenitizing:** 830-850°C in a **vacuum or high-purity controlled atmosphere furnace** to preserve surface integrity. The clean steel is less prone to intergranular oxidation. 2. **Quenching:** Oil or high-pressure gas quenching. 3. **Tempering:** **Double or triple tempering** at 160-220°C is recommended to achieve optimal stability and toughness. * **Grinding & Finishing:** The clean microstructure allows for excellent grindability and the potential to achieve superior surface finishes. ## **Summary** **Ovako 100CrMnSi6-4 837S Steel** is not merely a material but a **performance-guaranteed engineering solution** for the most demanding applications. It elevates the inherent advantages of silicon-alloyed bearing steel by incorporating the highest standards of micro-cleanliness and process control ("S" grade). This results in a component that offers **unmatched fatigue life, superior strength, and exceptional reliability**. For engineers designing systems where performance limits are constantly being pushed and where material failure carries extreme consequences, the 837S grade provides the ultimate confidence, representing the pinnacle of through-hardened bearing steel technology. -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi6-4 837S Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5291 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. -: Ovako 100CrMnSi6-4 837S Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100CrMnSi6-4 837S Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100CrMnSi6-4 837S Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Ovako 100CrMnSi6-4 837S 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 1762 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