100CrMnSi4-4 831B 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 100CrMnSi4-4 831B Steel Flange, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi4-4 831B Steel Flange, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100CrMnSi4-4 831B Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100CrMnSi4-4 831B Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100CrMnSi4-4 831B is a **high-carbon, silicon-enhanced bearing steel** supplied in a **spheroidize annealed condition**, engineered to provide a unique combination of **high strength, excellent wear resistance, and improved toughness**. This alloy distinguishes itself from standard 100Cr6 through a **significantly elevated silicon content** and balanced chromium-manganese levels, which enhance its solid solution strengthening and tempering resistance. The **"831B"** designation represents Ovako's premium quality grade for this specific chemistry, characterized by controlled processing and micro-cleanliness. The spheroidize annealed microstructure ensures optimal machinability and a homogeneous foundation for subsequent through-hardening heat treatment, making it ideal for components demanding superior mechanical performance under high stress. ## **Key Features & Benefits** * **Enhanced Strength and Toughness Balance:** The high silicon content (up to 0.70%) provides potent solid solution strengthening of the ferritic matrix, which translates to **higher core strength and improved toughness** in the hardened state compared to standard 100Cr6 at equivalent hardness levels. Silicon also suppresses the formation of brittle cementite, further benefiting ductility. * **Excellent Wear Resistance and Hardness Potential:** With a carbon content similar to 100Cr6 and sufficient chromium, the steel can achieve high hardness (**60-64 HRC**) after quenching and tempering, providing excellent resistance to abrasive wear and rolling contact fatigue. * **Improved Temper Resistance and Stability:** Silicon markedly increases the steel's resistance to softening during tempering. This allows components to **retain higher hardness at elevated operating temperatures** or permits the use of slightly higher tempering temperatures to improve toughness without excessive loss of hardness. * **Superior Machinability in Annealed State:** The spheroidize annealed condition provides a uniform hardness of ~200 HB and a fine globular carbide structure, ensuring **good chip formation, extended tool life, and efficient machining** of complex geometries prior to heat treatment. * **Good Hardenability:** The balanced chromium and manganese content provides adequate hardenability for through-hardening of moderately sized components, ensuring uniform properties. ## **International Standards & Designations** This steel corresponds to a specific silicon-enhanced bearing steel grade within European standards. | Region/Standard | Standard Designation | Common Name / Equivalent | | :--- | :--- | :--- | | **EUR (EN)** | **1.3537** | The direct standard designation. The name **100CrMnSi4-4** describes its chemistry (C~1%, Cr~1%, Mn~1%, Si~0.7%). | | **Germany (DIN / W-Nr.)** | **100CrMnSi4-4 / 1.3537** | | | **ISO** | **ISO 683-17: 100CrMnSi4** | Recognized variant within the bearing steel standard. | | **USA (AISI/ASTM)** | **No direct equivalent.** | Functionally similar to a modified **52100 with high silicon**. | | **Ovako Designation** | **831B** | "831" correlates with the material number 1.3537; **"B"** denotes a specific, controlled quality level within Ovako's production. | ## **Chemical Composition (Typical - %)** The composition is defined by its elevated silicon and balanced alloying. | Element | Content (%) | Role | | :--- | :--- | :--- | | **Carbon (C)** | 0.95 - 1.10 | Provides the carbon necessary for high-carbon martensite and carbide formation upon hardening. | | **Chromium (Cr)** | 0.90 - 1.20 | Enhances hardenability and promotes the formation of wear-resistant chromium carbides. | | **Manganese (Mn)** | 0.90 - 1.20 | Increases hardenability and strength. Works in tandem with silicon. | | **Silicon (Si)** | **0.50 - 0.70** | **Key differentiating element.** Powerful solid solution strengthener; significantly increases tempering resistance; improves toughness by suppressing brittle cementite; raises the elastic limit. | | **Sulfur (S)** | ≤ 0.010 | Kept low to ensure good transverse toughness and fatigue properties. | | **Phosphorus (P)** | ≤ 0.020 | Kept low. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Hardness:** **190 - 220 HB** (Typical aim: ~205 HB) * **Microstructure:** **Spheroidized carbides** in a ferritic matrix. * **Tensile Strength:** ~700 - 850 MPa * **Yield Strength (Rp0.2):** ~450 - 600 MPa * **Elongation (A5):** ≥ 15% * **Machinability:** Good, comparable to other annealed alloy steels of similar hardness. ## **Properties After Hardening & Tempering (Typical Process)** * **Austenitizing:** 830-850°C (Note: Si can slightly raise Ac1 temperature). * **Quenching:** Oil quench. * **Tempering:** 150-200°C. Due to high Si, tempering resistance is high. * **Final Hardness:** **60 - 64 HRC** * **Tensile Strength:** ~2100 - 2400 MPa * **Toughness:** Better than standard 100Cr6 at equivalent hardness due to Si benefit. ## **Typical Applications** This material is specified for high-performance components requiring a superior strength-toughness balance. * **High-Stress Bearings:** Bearings for applications with high dynamic loads and demanding fatigue life requirements, such as in gearboxes, heavy-duty pumps, and high-speed spindles. * **Precision Machine Components:** Gears, shafts, and rollers requiring high wear resistance and good impact tolerance. * **Tooling and Wear Parts:** Dies, guides, and fixtures where resistance to deformation and wear is critical. * **Automotive Performance Components:** High-stress transmission parts, camshafts, and valve train components. * **Aerospace and Defense Components:** Critical bearing and gear applications where reliability under varied loads is essential. ## **Processing Guidelines** * **Machining:** Perform all machining in the soft, spheroidize annealed condition. * **Heat Treatment (Customer Process):** 1. **Preheating:** Recommended, especially due to higher alloy content. 2. **Austenitizing:** 830-850°C in a controlled atmosphere. Soaking time should be sufficient for carbide dissolution. 3. **Quenching:** Agitated oil quench. 4. **Tempering:** Double tempering is recommended. The high Si content allows for effective tempering in the 180-220°C range to optimize toughness without significant hardness loss. * **Grinding:** Perform after hardening to achieve final dimensions. ## **Summary** **Ovako 100CrMnSi4-4 831B Steel in the Spheroidize Annealed condition** is a **specialized, high-performance bearing steel** that leverages silicon alloying to achieve a superior property profile. It offers an excellent compromise between the high hardness/wear resistance of classic 100Cr6 and the improved toughness and tempering stability provided by its elevated silicon content. For engineers seeking to push the performance limits of through-hardened components—where increased strength, better thermal stability, or enhanced damage tolerance are required—the 831B grade provides a proven and reliable material solution with distinct metallurgical advantages. -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi4-4 831B Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5289 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 100CrMnSi4-4 831B Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100CrMnSi4-4 831B Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100CrMnSi4-4 831B Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100CrMnSi4-4 831B Steel Flange, Spheroidize annealing -:- 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 1760 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