100Cr6 803D 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 100Cr6 803D Steel Flange, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803D Steel Flange, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100Cr6 803D Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100Cr6 803D Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100Cr6 803D is a specialized high-carbon chromium bearing steel supplied in a **spheroidize annealed condition** specifically engineered for applications requiring **enhanced machinability and dimensional stability**. The "D" designation represents a **controlled sulfur content** variant within Ovako's 800-series quality grades, where sulfur is intentionally maintained within an optimized range to improve chip formation during machining while maintaining adequate cleanliness levels for demanding applications. This material combines the fundamental metallurgical advantages of 100Cr6 (AISI 52100) steel—excellent hardenability and wear resistance—with superior manufacturability characteristics, making it an ideal choice for high-volume production of precision components. ## **Key Features & Benefits** * **Optimized Machinability:** The 803D grade features a controlled sulfur content (typically 0.015-0.030%) that promotes the formation of manganese sulfide (MnS) inclusions. These soft inclusions act as built-in chip breakers during machining operations, resulting in **shorter, more manageable chips, reduced cutting forces, extended tool life, and improved surface finish** compared to standard low-sulfur 100Cr6 grades. * **Superior Spheroidized Structure:** The specialized annealing process produces a uniform microstructure of fine, globular carbides evenly distributed in a soft ferrite matrix. This structure ensures **excellent response to subsequent heat treatment** with minimal distortion and predictable dimensional changes. * **Balanced Performance Profile:** While the sulfur addition slightly reduces transverse toughness compared to ultra-clean "Z" grades, the 803D maintains sufficient cleanliness and mechanical properties for the vast majority of bearing and mechanical applications, offering an optimal **balance between manufacturing efficiency and final component performance**. * **Consistent Hardening Response:** Despite the sulfur modification, the steel maintains excellent through-hardening characteristics typical of 100Cr6, ensuring uniform hardness distribution in properly heat-treated components. * **Cost-Effective Production:** The improved machinability directly translates to **higher machining speeds, reduced tooling costs, and increased production throughput**, making it economically advantageous for high-volume manufacturing. ## **International Standards & Designations** The 803D grade represents a specific machinability-enhanced variant within standard bearing steel specifications. | Region/Standard | Standard Designation | Equivalent / Similar Grade | Key Characteristic | | :--- | :--- | :--- | :--- | | **EUR (EN)** | **1.3505** (100Cr6) | Base material standard with controlled S. | Improved machinability variant. | | **ISO** | **ISO 683-17: 100Cr6** | Standard for through-hardening bearing steel. | MS (Medium Sulfur) designation. | | **USA (AISI/ASTM)** | **52100** (Free-Machining variant) | Often designated as "52100 Modified" or "52100 FM". | | | **Japan (JIS)** | **SUJ2** (Special grade) | | | | **Germany (DIN / W-Nr.)** | **100Cr6 / 1.3505** | With "S" suffix for improved machinability. | | | **Ovako Designation** | **803D** | "D" denotes controlled sulfur for enhanced machinability while maintaining quality. | | ## **Chemical Composition (Typical - %)** The composition follows standard 100Cr6 with specific adjustments to sulfur content. | Element | Content (%) | Role & Special Characteristic | | :--- | :--- | :--- | | **Carbon (C)** | 0.98 - 1.10 | Provides high hardness and wear resistance through martensite and carbide formation upon hardening. | | **Chromium (Cr)** | 1.35 - 1.60 | Improves hardenability, promotes fine carbide formation, and enhances wear resistance. | | **Manganese (Mn)** | 0.25 - 0.45 | Increases hardenability and combines with sulfur to form MnS inclusions. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, increases strength and tempering resistance. | | **Phosphorus (P)** | ≤ 0.025 | Kept at standard low levels. | | **Sulfur (S)** | **0.015 - 0.030** | **Key feature of 803D.** Controlled addition to form MnS inclusions that improve machinability without excessively compromising mechanical properties. | | **Nickel (Ni), Copper (Cu)** | ≤ 0.25 (each) | Residual elements. | | **Oxygen [O]** | < 15 ppm | Controlled oxygen content. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Hardness:** **190 - 220 HB** (Typical aim: ~205 HB). Optimal for machining operations. * **Microstructure:** Uniform **spheroidized carbides** in a ferritic matrix, with controlled MnS inclusions distributed throughout. * **Tensile Strength:** ~650 - 800 MPa * **Yield Strength (Rp0.2):** ~400 - 550 MPa * **Elongation (A5):** ~15 - 25% * **Reduction of Area (Z):** ~40 - 60% * **Machinability Rating:** **Significantly improved** compared to standard low-sulfur 100Cr6 grades. Typically 20-40% better tool life and/or higher cutting speeds achievable. * **Density:** 7.83 g/cm³ * **Thermal Conductivity:** ~46 W/(m·K) at 20°C * **Coefficient of Thermal Expansion:** ~11.5 x 10⁻⁶/K (20-100°C) ## **Properties After Hardening & Tempering (Indicative)** * **Final Hardness (Quenched & Tempered):** **60 - 64 HRC** (depending on tempering temperature). * **Transverse Toughness:** Slightly reduced compared to ultra-clean grades due to MnS stringers, but still adequate for most applications. * **Fatigue Life:** Maintains good fatigue performance for general to medium-duty applications. ## **Typical Applications** This spheroidize annealed material is particularly suited for high-volume production of components where machinability is a critical factor. * **High-Volume Bearing Components:** Inner and outer rings, balls, and rollers for automotive bearings, electric motor bearings, and general industrial bearings produced in large quantities. * **Automotive Components:** Transmission parts, steering components, and other high-volume precision parts requiring subsequent heat treatment. * **Industrial Machinery Parts:** Gears, shafts, pins, and bushings manufactured in large batches. * **Hydraulic & Pneumatic Components:** Parts requiring good wear resistance after hardening. * **General Mechanical Components:** Where an optimal balance between manufacturing cost and final performance is required. ## **Processing Guidelines** * **Machining:** The 803D grade is specifically designed for **superior machining performance**. All turning, milling, drilling, and threading operations should be performed in the soft, spheroidize annealed condition. Expect: * Shorter, broken chips * Reduced cutting forces * Improved surface finish * Extended tool life (20-40% improvement typical) * Higher possible cutting speeds * **Heat Treatment (Post-Machining):** 1. **Preheating:** 650-700°C recommended. 2. **Austenitizing:** 830-860°C in protective atmosphere. 3. **Quenching:** Oil quenching standard. 4. **Tempering:** 150-200°C for 2+ hours to achieve final hardness. * **Grinding:** After hardening, grinding operations proceed normally. The MnS inclusions may provide some lubricating effect during grinding. ## **Important Considerations** * **Anisotropy:** The MnS inclusions are elongated in the rolling direction, creating some anisotropy in mechanical properties. Transverse properties (especially toughness) are typically 10-20% lower than longitudinal properties. Component design should consider load orientation relative to the material's grain flow. * **Application Limits:** While excellent for most applications, 803D may not be suitable for components subjected to extreme multiaxial stresses or where maximum fatigue life in all directions is critical. For such applications, cleaner grades (803Q/803Z) are recommended. ## **Summary** **Ovako 100Cr6 803D Steel in the Spheroidize Annealed condition** is a strategically engineered material that optimizes the manufacturing process without significantly compromising end-use performance. By intelligently controlling sulfur content within the premium 800-series framework, it delivers exceptional machinability that reduces production costs and increases manufacturing efficiency. This makes it an ideal choice for high-volume production of precision components where the benefits of improved machinability outweigh the slight reduction in transverse properties. It represents the practical intersection of manufacturing economics and mechanical performance in the world of bearing steel technology. -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803D Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5259 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 100Cr6 803D Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100Cr6 803D Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100Cr6 803D Steel Flange, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100Cr6 803D 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 1730 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