105Cr6 High Carbon Bearing 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. -: 105Cr6 High Carbon Bearing Steel Flange (Composition Spec) Product Information -:- For detailed product information, please contact sales. -: 105Cr6 High Carbon Bearing Steel Flange (Composition Spec) Synonyms -:- For detailed product information, please contact sales. -:

105Cr6 High Carbon Bearing Steel (Composition Spec) Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: 105Cr6 High Carbon Bearing Steel (Composition Specification)** --- #### **1. Material Overview** **105Cr6** is a **high-carbon, chromium alloy bearing steel** defined by the **European standard EN ISO 683-17**. This grade is part of a family of through-hardening bearing steels designed for rolling contact applications. With a nominal composition of **1.05% carbon and 1.50% chromium**, it offers a specific balance of properties, providing **excellent wear resistance and high hardness**, though its **hardenability is slightly lower than the more common 100Cr6 (1.00% C, 1.50% Cr)** due to its higher carbon and more specifically defined chromium range. It is a specialized grade used where its particular combination of high carbon and controlled chromium is required for specific performance characteristics. #### **2. Key Material Concept: The European Chromium Bearing Steel Series** The European standard EN ISO 683-17 defines several bearing steel grades with precise chemical boundaries. 105Cr6 occupies a specific niche: - **Carbon Content:** At ~1.05%, it is at the **upper end of the carbon range** for standard bearing steels, promoting a high volume of hard carbides for maximum wear resistance and potential hardness. - **Chromium Content:** Fixed at a narrower range (1.40-1.65%) compared to some older standards, ensuring consistent hardenability and carbide formation. - **Positioning:** It is distinct from: - **100Cr6 (1.00% C):** The most common European bearing steel (equivalent to AISI 52100/SUJ2). - **102Cr6 (1.02% C):** Another variant with a specific carbon target. - **105Cr6's higher carbon** aims for maximum carbide content and abrasion resistance in the hardened state, which can be beneficial for certain wear parts, though it may slightly reduce toughness compared to 100Cr6. #### **3. International Standard & Cross-References** - **Primary Standard:** **EN ISO 683-17:2014** - Heat-treatable steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels. - **Material Designation:** **1.3505** (Old DIN/Werkstoff number). - **ISO Standard:** **ISO 683-17:2014**, Type 5 (Through-hardening bearing steel, corresponds to 100Cr6 series, with 105Cr6 as a specific subtype). - **AISI/SAE Equivalent:** No direct equivalent. The closest is **AISI 52100 (E52100)**, but 52100 has a wider Cr range (0.90-1.20%) and typically a slightly lower average carbon. - **JIS Equivalent:** **SUJ2** is functionally similar, though SUJ2's Cr range (1.30-1.60%) is centered lower. - **Chinese GB Equivalent:** **GCr15** is the closest equivalent in concept and common use. #### **4. Chemical Composition (% by Weight, per EN ISO 683-17)** | Element | Content Range (%) | Key Role | | :--- | :--- | :--- | | **Carbon (C)** | **1.00 – 1.10** | **High carbon content.** Primary source of hardness and carbide volume. Aims for maximum wear resistance. | | **Silicon (Si)** | **0.15 – 0.35** | Deoxidizer. | | **Manganese (Mn)** | **0.25 – 0.45** | Contributes to hardenability and solid solution strengthening. | | **Phosphorus (P)** | **≤ 0.025** | Impurity; kept very low. | | **Sulfur (S)** | **≤ 0.015** | **Very low.** Essential for high fatigue life and transverse properties. | | **Chromium (Cr)** | **1.40 – 1.65** | **Defining alloy.** Provides hardenability and forms hard, wear-resistant (Fe,Cr)₃C carbides. The range is tighter than in some older specs. | | **Nickel (Ni)** | **≤ 0.30** | Residual element; controlled. | | **Copper (Cu)** | **≤ 0.30** | Residual element; controlled. | | **Molybdenum (Mo)** | **≤ 0.10** | Residual element; controlled. | #### **5. Typical Physical & Mechanical Properties** **A. Physical Properties:** - **Density:** ~7.83 g/cm³ - **Modulus of Elasticity:** ~210 GPa - **Thermal Conductivity:** ~46 W/m·K - **Coefficient of Thermal Expansion:** ~11.9 x 10⁻⁶/°C **B. Mechanical Properties (After Standard Bearing Heat Treatment):** - **Hardness:** **61 – 65 HRC** (after quenching and low-temperature tempering at 150-200°C). Can achieve the **upper end** of this range due to high carbon. - **Retained Austenite:** Typically controlled to low levels (<5-8%) for dimensional stability. - **Core Hardness in Sections:** Good, but the high carbon can slightly reduce hardenability compared to a steel with similar Cr but lower C (like 100Cr6), potentially limiting the maximum fully hardenable diameter. - **Wear Resistance:** **Excellent.** The high carbon and chromium content provide a high volume of hard carbides. - **Toughness:** Slightly lower than 100Cr6 at equivalent hardness due to higher carbon content and greater carbide volume. #### **6. Processing & Fabrication Characteristics** - **Hardenability:** **Good to Very Good.** The 1.5% Cr provides substantial depth of hardening. However, the high carbon can shift the TTT curve, requiring careful control of austenitizing temperature and time to avoid excessive retained austenite or grain growth. Suitable for through-hardening of moderate-sized components. - **Machinability (Annealed):** **Fair to Poor.** The high carbon content and hardness in the annealed state make it more difficult to machine than lower-carbon steels. Requires appropriate tooling and speeds. - **Grindability:** **Excellent.** Critical for finishing bearing raceways to high precision. - **Weldability:** **Very Poor.** Not recommended. Extremely high risk of cracking. - **Decarburization Sensitivity:** **Very High.** Must be processed in protective atmospheres or with adequate stock allowance for subsequent grinding. #### **7. Primary Applications** 105Cr6 is used in demanding applications where its specific chemistry is specified or where maximum wear resistance is paramount: - **High-Wear Bearing Components:** Bearings subjected to significant abrasive wear in addition to rolling contact fatigue. - **Precision Wear Parts:** **Gauge blocks, measuring instruments, guide rails, and high-wear machine tool components** where extreme hardness and dimensional stability are required. - **Specialty Bearing Applications:** Where the specific carbon/chromium balance of 105Cr6 is called out in European machine or automotive designs. - **Ball and Roller Manufacturing:** For applications requiring the highest hardness. - **Automotive Components:** Certain high-stress, wear-critical components beyond standard bearings, such as specialized cam followers or fuel injection parts. #### **8. Available Forms & Quality** - **Forms:** Hot-rolled or cold-drawn bars, wire rod, seamless tubes, and forgings. - **Quality Levels:** Supplied per EN ISO 683-17 with specified **non-metallic inclusion ratings**. Common quality designations include: - **Standard Quality** - **Improved Quality (IQ)** – for higher demands. - **Superior Quality (SQ)** or **Ultra-Clean** – for highest fatigue life applications (e.g., aerospace, high-speed spindles). #### **9. Comparison with Key Bearing Steels** | Grade | EN Designation | Nominal C% | Nominal Cr% | Key Characteristic | | :--- | :--- | :--- | :--- | :--- | | **105Cr6** | **1.3505** | **1.05** | **1.50** | **High carbon for max wear resistance.** | | **100Cr6** | 1.3505 | 1.00 | 1.50 | **Most common European grade.** Optimal balance. | | **102Cr6** | 1.3520 | 1.02 | 1.45 | Similar to 100Cr6 with specific carbon target. | | **AISI 52100** | - | 1.00 | 1.45 | Global standard, wider Cr range. | --- **Disclaimer:** 105Cr6 is a specific European grade. Its higher carbon content makes it slightly more susceptible to carbide network formation if not properly processed. When selecting between 100Cr6 and 105Cr6, consider the trade-off between **wear resistance (higher C)** and **toughness/hardenability (slightly better with 100Cr6)**. The grade must be specified with the required **quality level (e.g., 105Cr6 SQ)**. Final performance is critically dependent on heat treatment parameters and steel cleanliness. For most general bearing applications, **100Cr6 (or AISI 52100/SUJ2) is the default and more widely available choice.** -:- For detailed product information, please contact sales. -: 105Cr6 High Carbon Bearing Steel (Composition Spec) Specification Dimensions Size： Diameter 20-1000 mm Length <5198 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. -: 105Cr6 High Carbon Bearing Steel (Composition Spec) Properties -:- For detailed product information, please contact sales. -:

Applications of 105Cr6 High Carbon Bearing Steel Flange (Composition Spec) -:- For detailed product information, please contact sales. -: Chemical Identifiers 105Cr6 High Carbon Bearing Steel Flange (Composition Spec) -:- For detailed product information, please contact sales. -:

Packing of 105Cr6 High Carbon Bearing Steel Flange (Composition Spec) -:- 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 1669 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