Ovako C45 SB1671 Steel Wire

Ovako C45 SB1671 Steel Wire Product Information -:- For detailed product information, please contact sales. -: Ovako C45 SB1671 Steel Wire Synonyms -:- For detailed product information, please contact sales. -:

Ovako C45 SB1671 Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Ovako C45 SB1671 Steel Bar** **Ovako C45 SB1671** is a high-performance **non-boron, hardenability-controlled engineering steel bar** produced by Ovako under their stringent internal SB (Special Bar) specifications. This grade represents a **premium-quality medium-carbon steel** engineered for applications requiring precise and consistent response to heat treatment, particularly through-hardening (quenching and tempering), where predictable and uniform mechanical properties are critical. The SB1671 designation signifies a steel with **guaranteed hardenability characteristics**, achieved through tight control of chemical composition rather than boron addition. It is optimized for components that undergo demanding machining operations prior to final heat treatment, where excellent machinability, superior surface quality, and reliable post-hardening performance are essential. This grade bridges the gap between standard commodity steels and highly alloyed grades, offering enhanced performance with excellent cost-effectiveness. --- ## **1. Chemical Composition (Per Ovako SB1671 Specification)** The composition follows the European C45 standard with enhanced controls on key elements to ensure consistent hardenability without boron addition. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) | **Hardenability Control** | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | 0.42 - 0.50 | 0.15 - 0.40 | **0.60 - 0.90** | **≤ 0.020** | 0.015 - 0.035 | **0.15 - 0.35** | **Tight Mn+Cr window** | | **Key Feature** | Base strength | Deoxidizer | **Primary hardenability driver** | **Ultra-low for toughness** | Machinability aid | **Secondary hardenability** | **Guaranteed Jominy band** | **Critical Features of the Composition:** * **Precision Hardenability Control:** The combined and tightly controlled ranges of **Manganese and Chromium** replace boron as the primary hardenability mechanism. This provides a more traditional and predictable hardening response, often preferred for critical components where boron-related sensitivity must be avoided. * **Enhanced Purity:** Features **ultra-low phosphorus (≤0.020%)**, exceeding standard grade requirements. This maximizes impact toughness, ductility, and fatigue resistance, particularly in the transverse direction. * **Optimized Machinability:** Controlled sulfur content within a narrow band ensures good chip formation and surface finish during machining without compromising transverse properties excessively. * **Consistency:** The narrow compositional windows guarantee minimal batch-to-batch variation in heat treatment results, a hallmark of Ovako's SB quality. --- ## **2. Physical & Mechanical Properties** ### **A. Supplied Condition (Soft Annealed for Machining):** * **Hardness:** **180 - 210 HB** * **Tensile Strength (Rm):** 650 - 750 MPa * **Yield Strength (Rp0.2):** 400 - 480 MPa * **Elongation (A):** ≥ 16% * **Machinability:** **Very Good** for its carbon content. The homogeneous, fine-grained annealed structure and controlled sulfur allow for high cutting speeds and good tool life. * **Surface Quality:** Excellent, with minimal decarburization and surface defects. ### **B. After Quenching & Tempering (Guaranteed Hardenability):** * **Hardenability:** Defined by a **guaranteed Jominy hardenability band** (e.g., J7=HRC 45-52, J15=HRC 35-42, as per specific heat lot certification). This ensures predictable depth of hardening. * **Mechanical Properties (Example - Q&T to ~900 MPa Rm):** * **Tensile Strength (Rm):** 900 - 1000 MPa * **Yield Strength (Rp0.2):** 700 - 800 MPa * **Hardness:** **28 - 33 HRC** * **Impact Toughness (KV):** Excellent due to low P and controlled microstructure. * **Uniformity:** Provides consistent properties from surface to core within the guaranteed hardenability depth. --- ## **3. Product Applications** Ovako C45 SB1671 is engineered for **high-stress, safety-critical components** that require reliable and verifiable heat treatment response, often in automotive, bearing, and general engineering sectors. * **Automotive Safety & Drivetrain:** **Gearbox shafts, differential components, steering pins, and high-strength connecting rods.** * **Bearing Components:** **Bearing rings, rollers, and races** that require through-hardening for uniform load-bearing capacity. * **Hydraulic & Fluid Power:** **High-pressure piston rods, pump shafts, and valve bodies.** * **General High-Performance Parts:** **Machine tool spindles, heavy-duty bolts (Property Class 10.9), and agricultural drive components.** * **Components for Further Processing:** Ideal substrate for **induction or flame hardening**, where the consistent, high-quality core is essential. --- ## **4. International & Equivalent Standards** SB1671 is a proprietary quality level that meets and exceeds base standards, with its closest equivalents being other hardenability-guaranteed grades. | Standard System | Equivalent / Comparable Grade | **Relationship / Note** | | :--- | :--- | :--- | | **Ovako** | **SB1671 (C45)** | The primary specification with guaranteed hardenability. | | **EN (DIN)** | **1.1203 (C45E)** **with Hardenability (HL/HR/HC band)** | The base EN grade. SB1671 would correspond to a C45E specified with a particular hardenability band (e.g., C45E+H). | | **ISO** | ISO 683-18: Type 1.1203 | Base standard equivalent. | | **AISI/SAE** | **1045H** | The U.S. equivalent for a hardenability-guaranteed 1045 grade. **The 'H' suffix is critical.** | | **JIS** | **S45C** (with specified hardenability) | Japanese equivalent; requires additional hardenability stipulation. | | **Customer-Specific** | Often meets **VDA 239-100** (German automotive standard) for case-hardening and through-hardening steels. | | **Crucial Distinction:** **SB1671 is not just "C45 steel."** It is **C45 with a guaranteed hardenability certificate.** For engineering applications requiring predictable performance, specifying "SB1671" or "C45E+H" (with a defined band) is necessary to procure material with these assured characteristics, unlike off-the-shelf C45. --- ## **5. Key Advantages & Considerations** **Advantages:** * **Predictable Heat Treatment:** Guaranteed hardenability band eliminates guesswork, reduces heat treatment trials, and ensures part-to-part consistency in final properties. * **Superior Toughness & Fatigue Life:** Ultra-low phosphorus content directly translates to enhanced impact strength and durability under cyclic loading. * **Excellent Machinability:** Superior surface finish and chip control in the annealed state reduce manufacturing costs and time. * **High Micro-Cleanliness:** Ovako's production ensures low oxide and sulfide inclusion counts, improving fatigue performance. * **No Boron-Related Sensitivity:** Avoids potential issues with temper embrittlement or weld HAZ cracking sometimes associated with boron steels. **Considerations:** * **Premium Price:** Commands a higher cost than standard non-guaranteed C45 due to enhanced controls and testing. * **Requires Heat Treatment:** To realize its value, components must undergo proper quenching and tempering. * **Hardenability Limit:** While guaranteed, its hardenability is lower than that of boron-treated (SB1672) or low-alloy steels (e.g., 4140). Suitable for defined section sizes. * **Proprietary Specification:** Sourcing is specific to Ovako and distributors carrying their SB-quality products. --- **Disclaimer:** This overview describes typical characteristics of Ovako C45 SB1671. For engineering design and specification, it is **imperative to consult the official Ovako technical datasheet for SB1671**, including the specific Jominy hardenability band provided with the material certificate. Successful application requires collaboration between the designer, heat treater, and steel producer to select the correct hardenability band for the component's section size and desired final properties. -:- For detailed product information, please contact sales. -: Ovako C45 SB1671 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5079 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 SB1671 Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako C45 SB1671 Steel Wire -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako C45 SB1671 Steel Wire -:- For detailed product information, please contact sales. -:

Packing of Ovako C45 SB1671 Steel Wire -:- 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 Wire 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 1550 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