100CrMnMoSi8-4-6 827B 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 100CrMnMoSi8-4-6 827B Steel Flange, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100CrMnMoSi8-4-6 827B Steel Flange, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100CrMnMoSi8-4-6 827B Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100CrMnMoSi8-4-6 827B Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100CrMnMoSi8-4-6 827B is a **high-performance, medium-alloy case-hardening steel** supplied in a **spheroidize annealed condition**. Distinguished from standard 100Cr6 bearing steels, this alloy features a significantly higher content of manganese, molybdenum, and silicon, providing **exceptional hardenability, core strength, and toughness**. The **"827B"** designation represents Ovako's premium quality grade for this specific chemistry, characterized by **enhanced micro-cleanliness and controlled processing**. The spheroidize annealed microstructure delivers optimal machinability and prepares the material for subsequent carburizing or carbonitriding processes, making it ideal for manufacturing large, heavily loaded components requiring a hard, wear-resistant case and a very strong, tough core. ## **Key Features & Benefits** * **Exceptional Core Properties After Case Hardening:** The alloy's high manganese and molybdenum content ensures deep and uniform hardenability, resulting in a **very strong and tough martensitic or bainitic core** (typically 38-48 HRC after carburizing and heat treatment) with high tensile and yield strength, capable of supporting heavy loads. * **Superior Hardenability for Large Sections:** Designed to through-harden in large cross-sections even with moderate quenching rates. This makes it suitable for **large gear blanks, thick-walled bearings, and heavy-duty components** where standard 100Cr6 would exhibit a soft core. * **Excellent 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. * **Optimized for Carburizing & Carbonitriding:** The chemistry is tailored to respond well to case-hardening processes, allowing for the development of a **deep, hard, and wear-resistant case** with good fatigue properties. The silicon content aids in maintaining core toughness during heat treatment. * **Enhanced Fatigue and Impact Resistance:** The combination of a strong, ductile core and a hard case provides outstanding resistance to bending fatigue, contact fatigue, and impact loading, making it suitable for the most demanding power transmission applications. ## **International Standards & Designations** This steel corresponds to a specific, high-hardenability case-hardening grade within European and international standards. | Region/Standard | Standard Designation | Common Name / Equivalent | | :--- | :--- | :--- | | **EUR (EN)** | **1.6527** | The direct standard designation for this specific analysis. The name **100CrMnMoSi8-4-6** describes its chemistry. | | **ISO** | **ISO 683-11: Type 20** | Similar in function to high-hardenability case-hardening steels like **20NiCrMo2-2** or **SAE 4320/8822**, but with a unique, higher-alloy composition. | | **Germany (DIN / W-Nr.)** | **100CrMnMoSi8-4-6 / 1.6527** | Often used in heavy industry specifications. | | **Ovako Designation** | **827B** | "827" correlates with the material number 1.6527; **"B"** denotes a specific, controlled quality level within Ovako's production. | ## **Chemical Composition (Typical - %)** The composition defines its high-hardenability and strength characteristics. | Element | Content (%) | Role | | :--- | :--- | :--- | | **Carbon (C)** | 0.90 - 1.05 | Provides a strong, hardenable core base. Lower than 100Cr6 to optimize core toughness after case hardening. | | **Chromium (Cr)** | 1.80 - 2.10 | Enhances hardenability, promotes fine carbides in the case, and improves wear resistance. | | **Manganese (Mn)** | 0.60 - 0.90 | **High content.** Dramatically increases hardenability and core strength. Aids in deoxidation. | | **Molybdenum (Mo)** | 0.30 - 0.50 | **Key alloying element.** Greatly enhances hardenability, refines grain structure, improves toughness at high strength levels, and increases tempering resistance. | | **Silicon (Si)** | 0.40 - 0.70 | **Elevated content.** A powerful solid solution strengthener for the ferrite core. Increases tempering resistance and improves toughness by suppressing brittle cementite formation. | | **Nickel (Ni)** | ≤ 0.25 | Residual; may be present in small amounts. | | **Sulfur (S)** | ≤ 0.010 | Kept low to ensure good transverse toughness and fatigue properties. | | **Phosphorus (P)** | ≤ 0.015 | Kept very 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 Case Hardening & Heat Treatment** * **Surface Case Properties (after carburizing):** * **Surface Hardness:** **58 - 63 HRC** (after tempering) * **Effective Case Depth:** Customizable, typically 1.0 - 4.0+ mm. * **Core Properties:** * **Core Hardness:** **38 - 48 HRC** (Depends on part size and quench severity) * **Core Tensile Strength:** ~1200 - 1600 MPa * **Core Toughness:** Very good for the achieved strength level, due to the Mo and Si content. ## **Typical Applications** This material is engineered for large, high-stress components in heavy industry. * **Large-Diameter Heavy-Duty Gearing:** Main drive gears, pinions, and planetary gears for wind turbines, mining equipment, marine propulsion, and heavy industrial gearboxes. * **Large Bearing Races & Slewing Rings:** For cranes, excavators, wind turbine yaw/pitch systems, and radar platforms. * **Heavy-Duty Axles & Shafts:** Subjected to high bending and torsional loads. * **Critical Components in Oil & Gas Industry:** Large pins, links, and transmission parts in drilling and pumping equipment. * **Forging Die Inserts & Tooling Bases:** Requiring high core strength and stability. ## **Processing Guidelines** * **Machining:** Perform all rough and finish machining in the soft, spheroidize annealed condition. * **Case Hardening Process:** 1. **Carburizing/Carbonitriding:** At 880-930°C to achieve desired case depth and carbon profile. 2. **Hardening:** Reheat to 800-850°C (core austenitizing temperature) and quench in oil or high-pressure gas. The high hardenability allows for full hardening of large sections with moderate quench rates. 3. **Tempering:** Typically at 150-200°C to relieve stresses while maintaining high hardness. * **Post-Hardening Finishing:** Final grinding of case-hardened surfaces. ## **Summary** **Ovako 100CrMnMoSi8-4-6 827B Steel in the Spheroidize Annealed condition** is a **premium engineering steel designed for extreme mechanical demands**. Its unique, highly alloyed chemistry provides a combination of deep hardenability, high core strength, and good toughness that is unmatched by standard bearing steels. It is the material of choice for engineers designing the largest and most critically loaded gears, bearings, and structural components in heavy machinery, where performance and reliability under maximum stress are paramount. The 827B quality ensures this performance is delivered with consistency and material integrity. -:- For detailed product information, please contact sales. -: Ovako 100CrMnMoSi8-4-6 827B Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5286 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 100CrMnMoSi8-4-6 827B Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100CrMnMoSi8-4-6 827B Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100CrMnMoSi8-4-6 827B Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100CrMnMoSi8-4-6 827B 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 1757 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