Ovako C55 EN 10083-2:2006 (ref) Steel Capillary

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

Packing of Ovako C55 EN 10083-2:2006 (ref) Steel Capillary, 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 Capillary 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