100Cr6 803D Steel Capillary

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

Ovako 100Cr6 803D Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100Cr6 803D Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100Cr6 803D is a specialized high-carbon chromium bearing steel supplied in a **spheroidize annealed condition** specifically engineered for applications requiring **enhanced machinability and dimensional stability**. The "D" designation represents a **controlled sulfur content** variant within Ovako's 800-series quality grades, where sulfur is intentionally maintained within an optimized range to improve chip formation during machining while maintaining adequate cleanliness levels for demanding applications. This material combines the fundamental metallurgical advantages of 100Cr6 (AISI 52100) steel—excellent hardenability and wear resistance—with superior manufacturability characteristics, making it an ideal choice for high-volume production of precision components. ## **Key Features & Benefits** * **Optimized Machinability:** The 803D grade features a controlled sulfur content (typically 0.015-0.030%) that promotes the formation of manganese sulfide (MnS) inclusions. These soft inclusions act as built-in chip breakers during machining operations, resulting in **shorter, more manageable chips, reduced cutting forces, extended tool life, and improved surface finish** compared to standard low-sulfur 100Cr6 grades. * **Superior Spheroidized Structure:** The specialized annealing process produces a uniform microstructure of fine, globular carbides evenly distributed in a soft ferrite matrix. This structure ensures **excellent response to subsequent heat treatment** with minimal distortion and predictable dimensional changes. * **Balanced Performance Profile:** While the sulfur addition slightly reduces transverse toughness compared to ultra-clean "Z" grades, the 803D maintains sufficient cleanliness and mechanical properties for the vast majority of bearing and mechanical applications, offering an optimal **balance between manufacturing efficiency and final component performance**. * **Consistent Hardening Response:** Despite the sulfur modification, the steel maintains excellent through-hardening characteristics typical of 100Cr6, ensuring uniform hardness distribution in properly heat-treated components. * **Cost-Effective Production:** The improved machinability directly translates to **higher machining speeds, reduced tooling costs, and increased production throughput**, making it economically advantageous for high-volume manufacturing. ## **International Standards & Designations** The 803D grade represents a specific machinability-enhanced variant within standard bearing steel specifications. | Region/Standard | Standard Designation | Equivalent / Similar Grade | Key Characteristic | | :--- | :--- | :--- | :--- | | **EUR (EN)** | **1.3505** (100Cr6) | Base material standard with controlled S. | Improved machinability variant. | | **ISO** | **ISO 683-17: 100Cr6** | Standard for through-hardening bearing steel. | MS (Medium Sulfur) designation. | | **USA (AISI/ASTM)** | **52100** (Free-Machining variant) | Often designated as "52100 Modified" or "52100 FM". | | | **Japan (JIS)** | **SUJ2** (Special grade) | | | | **Germany (DIN / W-Nr.)** | **100Cr6 / 1.3505** | With "S" suffix for improved machinability. | | | **Ovako Designation** | **803D** | "D" denotes controlled sulfur for enhanced machinability while maintaining quality. | | ## **Chemical Composition (Typical - %)** The composition follows standard 100Cr6 with specific adjustments to sulfur content. | Element | Content (%) | Role & Special Characteristic | | :--- | :--- | :--- | | **Carbon (C)** | 0.98 - 1.10 | Provides high hardness and wear resistance through martensite and carbide formation upon hardening. | | **Chromium (Cr)** | 1.35 - 1.60 | Improves hardenability, promotes fine carbide formation, and enhances wear resistance. | | **Manganese (Mn)** | 0.25 - 0.45 | Increases hardenability and combines with sulfur to form MnS inclusions. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer, increases strength and tempering resistance. | | **Phosphorus (P)** | ≤ 0.025 | Kept at standard low levels. | | **Sulfur (S)** | **0.015 - 0.030** | **Key feature of 803D.** Controlled addition to form MnS inclusions that improve machinability without excessively compromising mechanical properties. | | **Nickel (Ni), Copper (Cu)** | ≤ 0.25 (each) | Residual elements. | | **Oxygen [O]** | < 15 ppm | Controlled oxygen content. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Hardness:** **190 - 220 HB** (Typical aim: ~205 HB). Optimal for machining operations. * **Microstructure:** Uniform **spheroidized carbides** in a ferritic matrix, with controlled MnS inclusions distributed throughout. * **Tensile Strength:** ~650 - 800 MPa * **Yield Strength (Rp0.2):** ~400 - 550 MPa * **Elongation (A5):** ~15 - 25% * **Reduction of Area (Z):** ~40 - 60% * **Machinability Rating:** **Significantly improved** compared to standard low-sulfur 100Cr6 grades. Typically 20-40% better tool life and/or higher cutting speeds achievable. * **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 (Indicative)** * **Final Hardness (Quenched & Tempered):** **60 - 64 HRC** (depending on tempering temperature). * **Transverse Toughness:** Slightly reduced compared to ultra-clean grades due to MnS stringers, but still adequate for most applications. * **Fatigue Life:** Maintains good fatigue performance for general to medium-duty applications. ## **Typical Applications** This spheroidize annealed material is particularly suited for high-volume production of components where machinability is a critical factor. * **High-Volume Bearing Components:** Inner and outer rings, balls, and rollers for automotive bearings, electric motor bearings, and general industrial bearings produced in large quantities. * **Automotive Components:** Transmission parts, steering components, and other high-volume precision parts requiring subsequent heat treatment. * **Industrial Machinery Parts:** Gears, shafts, pins, and bushings manufactured in large batches. * **Hydraulic & Pneumatic Components:** Parts requiring good wear resistance after hardening. * **General Mechanical Components:** Where an optimal balance between manufacturing cost and final performance is required. ## **Processing Guidelines** * **Machining:** The 803D grade is specifically designed for **superior machining performance**. All turning, milling, drilling, and threading operations should be performed in the soft, spheroidize annealed condition. Expect: * Shorter, broken chips * Reduced cutting forces * Improved surface finish * Extended tool life (20-40% improvement typical) * Higher possible cutting speeds * **Heat Treatment (Post-Machining):** 1. **Preheating:** 650-700°C recommended. 2. **Austenitizing:** 830-860°C in protective atmosphere. 3. **Quenching:** Oil quenching standard. 4. **Tempering:** 150-200°C for 2+ hours to achieve final hardness. * **Grinding:** After hardening, grinding operations proceed normally. The MnS inclusions may provide some lubricating effect during grinding. ## **Important Considerations** * **Anisotropy:** The MnS inclusions are elongated in the rolling direction, creating some anisotropy in mechanical properties. Transverse properties (especially toughness) are typically 10-20% lower than longitudinal properties. Component design should consider load orientation relative to the material's grain flow. * **Application Limits:** While excellent for most applications, 803D may not be suitable for components subjected to extreme multiaxial stresses or where maximum fatigue life in all directions is critical. For such applications, cleaner grades (803Q/803Z) are recommended. ## **Summary** **Ovako 100Cr6 803D Steel in the Spheroidize Annealed condition** is a strategically engineered material that optimizes the manufacturing process without significantly compromising end-use performance. By intelligently controlling sulfur content within the premium 800-series framework, it delivers exceptional machinability that reduces production costs and increases manufacturing efficiency. This makes it an ideal choice for high-volume production of precision components where the benefits of improved machinability outweigh the slight reduction in transverse properties. It represents the practical intersection of manufacturing economics and mechanical performance in the world of bearing steel technology. -:- For detailed product information, please contact sales. -: Ovako 100Cr6 803D Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5259 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 803D Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

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

Packing of Ovako 100Cr6 803D Steel Capillary, 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 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 1730 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