Ovako C45 5081

Ovako C45 5081, Imatra 4 M Steel, +AR Product Information -:- For detailed product information, please contact sales. -: Ovako C45 5081, Imatra 4 M Steel, +AR Synonyms -:- For detailed product information, please contact sales. -:

Ovako C45 5081, Imatra 4 M Steel, +AR Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Ovako C45 5081, Imatra 4 M Steel, +AR** **Ovako C45 5081, Imatra 4 M, +AR** is a premium **medium-carbon engineering steel plate or heavy bar** produced under strict metallurgical controls at Ovako's Imatra mill. This full designation indicates: * **C45 5081:** The base material grade (C45) and Ovako's proprietary specification code (5081). * **Imatra 4 M:** Specifies production at Ovako's Imatra facility under their premium "4 M" quality standard, characterized by exceptional cleanliness and controlled inclusion morphology. * **+AR (As-Rolled):** The delivery condition – supplied in the hot-rolled state without subsequent heat treatment, retaining the microstructural characteristics from controlled thermomechanical rolling. This product is engineered for applications where the controlled as-rolled condition provides optimal balance between initial properties, machinability, and suitability for subsequent customer heat treatment. The "4 M" quality ensures superior fatigue performance and consistency, making it a preferred choice for demanding structural and mechanical components that require reliability and predictable response to further processing. --- ## **1. Chemical Composition (Ovako 5081 Specification)** The chemistry follows a controlled C45 formulation with enhanced purity standards typical of Ovako's premium grades. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) | Aluminum (Al) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Range** | 0.42 - 0.50 | 0.15 - 0.40 | 0.60 - 0.90 | **≤ 0.015** | **≤ 0.015** | 0.15 - 0.30 | 0.020 - 0.050 | | **Key Feature** | Strength base | Deoxidizer | Hardenability control | **Ultra-low for toughness** | **Ultra-low for isotropy** | Hardenability/consistency | Grain refinement | **Critical Features of the Composition:** * **Ultra-Low Impurity Control:** Exceptionally low phosphorus (**≤0.015%**) and sulfur (**≤0.015%**) maximize **transverse toughness, fatigue strength, and weldability**. This is a defining advantage over standard C45 grades. * **"4 M" Cleanliness:** The "M" designation indicates **restricted inclusion content** per method M (microscopic examination). This results in very low levels of oxide and sulfide inclusions, significantly enhancing **fatigue life and machined surface quality**. * **Controlled Hardenability:** Tight manganese and chromium ranges ensure predictable response to any post-rolling heat treatment (quenching & tempering, induction hardening). * **Aluminum Treatment:** Used for grain refinement and deoxidation, promoting a fine, uniform microstructure in the as-rolled condition. --- ## **2. Physical & Mechanical Properties (+AR Condition)** Properties in the As-Rolled state result from controlled rolling and cooling practices at the Imatra mill. | Property | Typical Value - As-Rolled (+AR) | **Technical Significance** | | :--- | :--- | :--- | | **Yield Strength (Rp0.2)** | **≥ 355 MPa** | Provides good structural capacity in as-supplied state. | | **Tensile Strength (Rm)** | **560 - 700 MPa** | Balanced strength for many applications without heat treatment. | | **Elongation (A)** | **≥ 18%** | Good ductility despite as-rolled condition. | | **Hardness** | **170 - 220 HB** | Suitable for machining with appropriate tooling. | | **Impact Toughness (KV, transverse)** | **≥ 40 J at 20°C** | **Excellent for as-rolled C45,** directly resulting from ultra-low P,S and clean steel. | | **Microstructure** | Fine-grained ferrite-pearlite | Uniform structure providing consistent properties. | | **Machinability** | **Good (for +AR condition).** Superior to standard as-rolled C45 due to cleaner steel and more uniform microstructure. | | | **Surface** | Hot-rolled mill scale. | Requires descaling for machining or painting. | **Note on Customer Heat Treatment:** This steel is an excellent substrate for: * **Quenching & Tempering:** Can achieve tensile strengths of 900-1200+ MPa with proper heat treatment. * **Induction/Flamе Hardening:** The clean, homogeneous core provides optimal support for hardened cases. --- ## **3. Product Applications** This material is specified for **high-performance components** where the combination of as-rolled cost efficiency and premium quality is required, particularly in demanding environments. * **Heavy-Duty Mobile Equipment:** **Axle beams, suspension components, and frame parts** for trucks, cranes, and agricultural machinery. * **Energy Sector Components:** **Gear blanks, shaft forgings, and structural parts** in wind power and hydraulic systems. * **Material Handling:** **Heavy-duty rollers, conveyor shafts, and lifting components.** * **Machine Construction:** **Base plates, welding fabrications, and large fixtures** requiring better toughness than standard hot-rolled steel. * **Components for Further Processing:** Ideal for parts that will be **machined and heat-treated** by the customer, where the premium quality base material ensures final performance. --- ## **4. International & Equivalent Standards** This is a proprietary product combining specific chemistry, quality level, and production controls. | Standard System | Equivalent / Comparable Grade | **Key Differences** | | :--- | :--- | :--- | | **Ovako Specification** | **C45 5081, Imatra 4 M, +AR** | The exact product. The "5081" and "4 M" are Ovako-specific. | | **EN 10250-2** | **1.0503 (C45E)** + **M** | The base grade is C45E. The "M" denotes special quality with non-metallic inclusion requirements. Ovako's "4 M" typically exceeds standard "M" requirements. | | **ASTM A6/A6M** | **A36 / A572-50** (Structural) | Structural grade equivalents in terms of yield strength, but C45 5081 has higher carbon, better hardenability, and far superior cleanliness/toughness. | | **ASTM A668** | **Class F (1045)** | Closest ASTM forging specification, but without the guaranteed cleanliness of "4 M". | | **Special Quality** | Often qualifies for **EN 10221** (SBQ steel) and customer-specific standards like **VDA 239-100**. | | **Crucial Distinction:** While chemically similar to C45/1045, the **"Imatra 4 M" quality is the key differentiator.** It guarantees superior internal cleanliness and toughness not found in commodity-grade as-rolled material. This must be specified to obtain these performance benefits. --- ## **5. Key Advantages & Considerations** **Advantages:** * **Premium Toughness in As-Rolled State:** Ultra-low P and S provide exceptional impact properties, especially in the transverse direction. * **Superior Fatigue Performance:** The "4 M" cleanliness significantly extends component life under cyclic loading. * **Cost-Effective for Large Sections:** +AR condition avoids cost of mill heat treatment on heavy plates or large bars. * **Excellent Base for Hardening:** Consistent composition and cleanliness ensure predictable results in customer heat treatment. * **Enhanced Weldability:** Low carbon equivalent and ultra-low P/S reduce cracking risk compared to standard C45. **Considerations:** * **Mill Scale Removal Required:** Surface must be cleaned (blasting, pickling) before most fabrication or finishing. * **Property Variability:** Properties may show more variation through thickness than normalized material. * **Not Annealed:** Harder and less uniform for machining than annealed stock; requires robust machining setup. * **Specific Sourcing:** An Ovako proprietary product; requires sourcing through their network. --- **Disclaimer:** The mechanical property ranges provided are typical. For critical design applications, **always refer to the specific Ovako inspection certificate (3.1 per EN 10204)** accompanying the material, which provides verified test results for the supplied batch. Consultation with Ovako's technical service is recommended for component design and heat treatment specification. -:- For detailed product information, please contact sales. -: Ovako C45 5081, Imatra 4 M Steel, +AR Specification Dimensions Size： Diameter 20-1000 mm Length <5080 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 C45 5081, Imatra 4 M Steel, +AR Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako C45 5081, Imatra 4 M Steel, +AR -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako C45 5081, Imatra 4 M Steel, +AR -:- For detailed product information, please contact sales. -:

Packing of Ovako C45 5081, Imatra 4 M Steel, +AR -:- 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 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 1551 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