100Cr6 803Q Steel Foil/Strip

Ovako 100Cr6 803Q Steel Foil, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803Q Steel Foil, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100Cr6 803Q Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100Cr6 803Q Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100Cr6 803Q is a high-carbon, chromium-alloyed bearing steel supplied in a **spheroidize annealed condition**. This specialized heat treatment transforms the steel's microstructure into a uniform dispersion of fine, spherical carbides in a soft ferrite matrix. The resulting material offers excellent machinability, predictable dimensional stability during subsequent heat treatment, and a reliable foundation for achieving the high hardness and wear resistance characteristic of through-hardened bearing components. The **803Q** designation indicates Ovako's specific quality grade, which includes enhanced control over cleanliness, segregation, and annealing uniformity. ## **Key Features & Benefits** * **Optimal Machinability:** The spheroidize annealed structure provides a consistent hardness of ~200 HB, significantly improving tool life, surface finish, and chip formation during turning, milling, and drilling compared to harder or lamellar pearlitic structures. * **Superior Carbide Morphology:** The annealing process produces fine, evenly distributed globular carbides. This structure minimizes stress concentrations, promotes uniform hardening response, and enhances final toughness and fatigue life after quenching and tempering. * **Excellent Dimensional Stability:** The soft, stable annealed condition and homogeneous microstructure minimize the risk of distortion and unpredictable dimensional changes during final machining and subsequent heat treatment, critical for precision bearing components. * **Controlled Hardenability:** As a standard 100Cr6 grade, it offers good and predictable through-hardening properties, allowing it to achieve high and uniform surface hardness in oil-quenched sections of moderate size. * **High Purity & Consistency (803Q Grade):** Ovako's 803Q specification ensures tight control over non-metallic inclusion content (e.g., improved cleanliness per ISO 4967 Method A), reduced segregation, and precise annealing, leading to more reliable performance in demanding applications. ## **International Standards & Designations** Ovako 100Cr6 803Q corresponds to several international bearing steel standards in its annealed state. | Region/Standard | Standard Designation | Equivalent / Similar Grade | | :--- | :--- | :--- | | **EUR (EN)** | **1.3505** (100Cr6) | The base material standard. | | **ISO** | **ISO 683-17: 100Cr6** | Standard for through-hardening bearing steel. | | **USA (AISI/ASTM)** | **52100** | The most common direct equivalent. | | **USA (UNS)** | **G52986** | | | **Japan (JIS)** | **SUJ2** | | | **Germany (DIN / W-Nr.)** | **100Cr6 / 1.3505** | | | **Ovako Designation** | **803Q** | Denotes a specific quality level with enhanced control over microstructure and cleanliness. | ## **Chemical Composition (Typical - %)** The composition adheres to the classic 100Cr6/52100 specification, optimized for hardening response and carbide formation. | Element | Content (%) | Role | | :--- | :--- | :--- | | **Carbon (C)** | 0.98 - 1.10 | Provides high hardness and wear resistance through martensite and carbide formation. | | **Chromium (Cr)** | 1.35 - 1.60 | Improves hardenability, promotes fine carbide formation, and enhances wear and corrosion resistance. | | **Manganese (Mn)** | 0.25 - 0.45 | Increases hardenability and strength. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, increases strength and tempering resistance. | | **Phosphorus (P)** | ≤ 0.025 | Impurity; kept low to maintain toughness. | | **Sulfur (S)** | ≤ 0.015 | Impurity; kept low for improved fatigue performance. | | **Nickel (Ni)** | ≤ 0.25 | Residual element. | | **Copper (Cu)** | ≤ 0.30 | Residual element. | | **Molybdenum (Mo)** | ≤ 0.10 | Residual element, can improve hardenability. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Hardness:** **190 - 220 HB** (Typical aim: ~200 HB). This is the optimal range for machining. * **Microstructure:** **Spheroidized Carbides** in a ferritic matrix. Carbide size and distribution are tightly controlled. * **Tensile Strength:** ~650 - 800 MPa * **Yield Strength (Rp0.2):** ~400 - 500 MPa * **Elongation (A5):** ~15 - 25% * **Reduction of Area (Z):** ~40 - 60% * **Density:** 7.83 g/cm³ * **Thermal Conductivity:** ~46 W/(m·K) at 20°C * **Coefficient of Thermal Expansion:** ~11.5 x 10⁻⁶/K (20-100°C) ## **Properties After Hardening & Tempering (Typical)** * **Hardening:** Austenitize at 830-860°C, oil quench. * **Tempering:** Typically at 150-200°C for bearing applications. * **Final Hardness:** **60 - 64 HRC** * **Core Properties:** High compressive strength and excellent contact fatigue resistance. ## **Typical Applications** This material in the spheroidize annealed state is the preferred starting stock for manufacturing a wide range of high-precision, through-hardened components: * **Bearing Components:** Inner and outer rings, balls, and rollers for ball bearings, roller bearings, and slewing rings. * **Automotive Parts:** Gearbox components, transmission parts, fuel injection system components, and high-wear shafts. * **Machine Tools & Industrial Equipment:** Guide rollers, spindles, pins, bushings, and other high-strength, wear-resistant parts. * **Consumer & Industrial Tools:** High-quality blades for cutting and slicing applications, after hardening. ## **Processing Guidelines** * **Machining:** Perform all machining operations (turning, milling, drilling, grinding) in the **soft, spheroidize annealed condition**. Use sharp tools and standard cutting parameters for steels of ~200 HB hardness. * **Heat Treatment (Post-Machining):** 1. **Preheating:** Recommended at 650-700°C to reduce thermal stress. 2. **Austenitizing:** Heat to 830-860°C in a controlled atmosphere or vacuum furnace to prevent decarburization. 3. **Quenching:** Oil quenching is standard for sections up to ~25mm. Larger sections may require faster quenchants. 4. **Tempering:** Temper immediately after quenching. For bearings: 150-200°C for 1-3 hours to achieve 60-64 HRC. Higher tempering temperatures reduce hardness but increase toughness. * **Grinding:** After hardening, final dimensions and surface finish are achieved by grinding. Use proper coolant to avoid grinding burns. * **Forming:** Limited cold forming is possible in the annealed state. ## **Summary** **Ovako 100Cr6 803Q in the Spheroidize Annealed condition** is a premium-quality bearing steel feedstock. Its controlled, globular carbide structure ensures exceptional machinability and provides a reliable, uniform foundation for subsequent hardening. The enhanced quality controls of the 803Q grade translate into greater consistency in final component performance, particularly in fatigue life and dimensional precision. It is the material of choice for manufacturers of high-performance bearings and precision mechanical components requiring a combination of excellent manufacturability and ultimate wear resistance. -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803Q Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5251 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 100Cr6 803Q Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100Cr6 803Q Steel Foil, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100Cr6 803Q Steel Foil, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100Cr6 803Q Steel Foil/Strip, Spheroidize annealing -:- 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 Foil/Strip 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 1722 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