Ovako C55 EN 10083-2:2006 (ref) 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 C55 EN 10083-2:2006 (ref) Steel Flange, Hardening Product Information -:- For detailed product information, please contact sales. -: Ovako C55 EN 10083-2:2006 (ref) Steel Flange, Hardening Synonyms -:- For detailed product information, please contact sales. -:

Ovako C55 EN 10083-2:2006 (ref) Steel, Hardening Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Ovako C55 Steel, EN 10083-2:2006 (ref), for Hardening** **Ovako C55 (EN 10083-2:2006 reference)** is a standardized **high-carbon, non-alloy quality steel** produced by Ovako, engineered for applications demanding high surface hardness and wear resistance through hardening. The designation indicates that while the steel is manufactured by Ovako, its fundamental characteristics are aligned with the European standard EN 10083-2 for the C55 grade. This provides a reliable, standardized baseline for chemical composition and hardenability, upon which Ovako applies its production controls to ensure high quality and consistency for hardening processes. This material is typically supplied in a soft-annealed or spheroidized condition to allow for machining, after which it undergoes final heat treatment (quenching and tempering) by the customer to achieve its full potential of high hardness and strength. It is a fundamental choice for components where wear resistance is a primary design criterion and where the use of more expensive alloy steels is not justified. --- ## **1. Chemical Composition (Per EN 10083-2:2006 - Grade 1.1203)** The composition adheres to the standard limits for the C55 grade, which features a higher carbon content than the more common C45. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr)* | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **EN 10083-2 Limits for C55** | 0.52 - 0.60 | ≤ 0.40 | 0.60 - 0.90 | ≤ 0.035 | ≤ 0.035 | ≤ 0.40 | | **Ovako Typical/Controlled** | 0.54 - 0.58 | 0.15 - 0.30 | 0.65 - 0.85 | **≤ 0.025** | **≤ 0.020** | ≤ 0.25 | | **Key Role** | **Primary driver of hardness & wear resistance.** | Deoxidizer. | Enhances hardenability. | **Lower than max for improved toughness.** | **Lower than max for better machinability/isotropy.** | Residual, aids hardenability. | **Critical Features for Hardening:** * **High Carbon Content (0.52-0.60%):** This is the defining feature, enabling the formation of a high volume of hard martensite and carbides upon quenching. This directly translates to **high achievable hardness (typically 55-62 HRC after tempering)** and superior wear resistance. * **Standardized Hardenability:** The specified manganese range provides a known and predictable level of hardenability, suitable for oil quenching of moderate-sized components. * **Enhanced Purity (Ovako's Practice):** Ovako typically produces this grade with phosphorus and sulfur contents well below the standard's maximum limits. This practice **improves toughness, reduces the risk of quench cracking, and results in more uniform mechanical properties**. * **Material Designation:** Can be fully identified as **EN 10083-2 | 1.1203 | C55E** when supplied as an engineering steel for hardening. --- ## **2. Physical & Mechanical Properties** The standard defines the steel's potential after heat treatment. Properties in the supplied (soft) condition and the final hardened state are both critical. **A. Supplied Condition (e.g., Soft Annealed/+A):** * **Hardness:** **≤ 212 HB** (Typically 180-205 HB). * **Microstructure:** Spheroidized or fine pearlitic-ferritic, optimized for machinability. * **Tensile Strength (Rm):** ~ 650 - 750 MPa. * **Machinability:** **Fair.** The high carbon content makes it tougher to machine than lower-carbon steels like C45. However, in the properly annealed state, good surface finishes and tool life are achievable with appropriate cutting parameters. **B. After Quenching & Tempering (Final Hardened State - Example):** * **Hardness:** **55 - 62 HRC** (Dependent on tempering temperature; as-quenched hardness can exceed 65 HRC). * **Tensile Strength (Rm):** **1800 - 2200 MPa** (Correlates with high hardness). * **Yield Strength (Rp0.2):** **1500 - 1800 MPa**. * **Elongation (A) & Impact Toughness (KV):** **Low.** This is an inherent characteristic of high-carbon hardened steels; they are **hard and wear-resistant but not tough**. Design must avoid impact and high tensile stress concentrations. * **Core Uniformity:** Good hardenability for sections up to ~25-30mm (oil quench); larger sections may show a hardness gradient. --- ## **3. Product Applications** Ovako C55 (EN 10083-2 ref) is specified for components where **maximizing wear resistance and hardness is the primary goal**, and where high toughness is not required. * **Wear Parts & Tools:** **Blades, shear knives, punches, dies (for non-shock loads), mandrels, and wear plates.** * **Automotive & Mechanical Components:** **High-wear camshafts, tappets, clutch components, and heavy-duty bearing races.** * **Shafts & Axles:** **High-stress, low-impact shafts** where surface hardness is critical to prevent scoring and wear. * **Agricultural Implements:** **Cultivator points, plow shares, and cutter bars.** * **Gearing:** **Gears subject to high surface contact stress** where pitting resistance is key (often followed by case hardening for even better performance). --- ## **4. International & Equivalent Standards** EN 10083-2 C55 is a well-established standard with global equivalents. | Standard System | Equivalent Grade | **Status / Relationship** | | :--- | :--- | :--- | | **EN (Reference Standard)** | **EN 10083-2:2006 - 1.1203 (C55)** | The normative reference for this product's core specification. | | **DIN** | **1.1203 (Ck55 / Cf55)** | The German origin standard, now part of EN. 'Ck' for through-hardening, 'Cf' for surface hardening. | | **ISO** | **ISO 683-18: Type 1.1203** | International equivalent. | | **AISI/SAE (USA)** | **1055 / 1060** | The closest U.S. equivalents in terms of carbon content. **Note:** Manganese ranges differ slightly. | | **JIS (Japan)** | **S55C** | Direct Japanese equivalent. | | **GB (China)** | **55# Steel** | Chinese equivalent. | | **Ovako Proprietary** | e.g., **C55 056K** | Ovako's own specifications may have tighter controls or be boron-treated for specific applications. | **Key Distinction:** Specifying **"Ovako C55 to EN 10083-2 (ref)"** indicates a material that **conforms to the chemical and fundamental quality requirements of that standard**, as produced by Ovako. It is a **standardized, high-carbon grade** distinct from proprietary variants (like boron-treated SBC55) and from lower-carbon grades like C45. --- ## **5. Key Advantages & Considerations** **Advantages:** * **High & Predictable Hardness Potential:** The standardized chemistry ensures reliable attainment of high hardness levels (55-62 HRC) after proper heat treatment. * **Excellent Wear Resistance:** The primary benefit, leading to long service life in abrasive or high-pressure sliding/rolling contact applications. * **Cost-Effective Hardness Solution:** Provides a high hardness capability at a lower cost than most low-alloy or tool steels. * **Good Machinability in Annealed State:** Allows for complex geometry to be machined before the final, irreversible hardening step. **Considerations:** * **Low Toughness & High Brittleness:** **The most critical limitation.** Susceptible to chipping, cracking, or catastrophic brittle fracture under impact, shock loading, or high tensile stress. Not suitable for safety-critical or impact-loaded parts. * **High Risk of Quench Cracking:** The high carbon content makes it extremely sensitive to thermal shock during quenching. **Strict control of quenching medium (often oil, not water), temperature, and part geometry is mandatory.** * **Poor Weldability:** **Generally not considered weldable**, especially in the hardened state. Any required welding must be done prior to hardening with extensive precautions. * **Limited Hardenability Depth:** While good for its class, it is still a plain carbon steel. Through-hardening is effective for limited section sizes. --- **Disclaimer:** The successful hardening of Ovako C55 is a **critical and high-risk process.** **Expert heat treatment is non-negotiable.** It is strongly recommended to: 1. **Consult Ovako's technical data** for recommended austenitizing temperatures and quenching practices. 2. **Engage a qualified heat treater** with experience in high-carbon steels. 3. Consider techniques like **martempering (hot oil quenching)** to reduce thermal stress and distortion. 4. Always **test the heat treatment cycle on a sample piece** before processing production components. This material should be specified in the **soft-annealed condition** for machining. -:- For detailed product information, please contact sales. -: Ovako C55 EN 10083-2:2006 (ref) Steel, Hardening Specification Dimensions Size： Diameter 20-1000 mm Length <5091 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 C55 EN 10083-2:2006 (ref) Steel, Hardening Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako C55 EN 10083-2:2006 (ref) Steel Flange, Hardening -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako C55 EN 10083-2:2006 (ref) Steel Flange, Hardening -:- For detailed product information, please contact sales. -:

Packing of Ovako C55 EN 10083-2:2006 (ref) Steel Flange, Hardening -:- 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 1562 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