100CrMnSi6-4 837R Steel Rod/Bar

Ovako 100CrMnSi6-4 837R Steel Rod Product Information -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi6-4 837R Steel Rod Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100CrMnSi6-4 837R Steel Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100CrMnSi6-4 837R Steel** ## **Product Overview** Ovako 100CrMnSi6-4 837R is a **specialized, high-performance bearing steel** characterized by its **elevated silicon content for improved strength and toughness**. This alloy represents a specific variant within the high-silicon bearing steel family, with **chromium, manganese, and silicon levels optimized for demanding mechanical applications**. The **"837R"** designation indicates Ovako's controlled quality grade for this chemistry, with the **"R"** suffix often signifying a specific processing route or quality level (e.g., "Refined"). This steel is designed to provide **superior mechanical properties** compared to standard 100Cr6, particularly in terms of **tensile strength, tempering resistance, and toughness at high hardness**, making it ideal for critical components under extreme stress. ## **Key Features & Benefits** * **Enhanced Strength and Toughness Balance:** The high silicon content (approximately 0.5-0.7%) provides powerful solid solution strengthening of the ferritic/martensitic matrix. This results in **higher tensile and yield strength** at equivalent hardness levels compared to standard grades, while silicon's role in suppressing brittle cementite formation also contributes to **improved fracture toughness**. * **Superior Temper Resistance:** Silicon significantly increases the steel's resistance to softening during tempering. This allows components to **maintain higher hardness at elevated operating temperatures** or enables the use of higher tempering temperatures to improve toughness without excessive loss of hardness. * **Good Wear Resistance and Hardness Potential:** With a carbon content around 1% and sufficient chromium, the steel can achieve high hardness (**60-64 HRC**) after proper heat treatment, providing excellent resistance to abrasive wear and contact fatigue. * **Controlled Quality for Consistent Performance:** The 837R quality grade ensures consistent chemical composition, micro-cleanliness, and processing, leading to predictable hardenability and reliable mechanical properties in the final component. * **Versatile Applications:** Suitable for both through-hardening and, in some cases, specialized surface hardening processes for components requiring a unique combination of core properties and surface durability. ## **International Standards & Designations** This steel corresponds to a specific silicon-enhanced bearing steel grade. | Region/Standard | Standard Designation | Common Name / Equivalent | | :--- | :--- | :--- | | **EUR (EN)** | **1.3538** (Approximate) | The likely standard designation. The name **100CrMnSi6-4** describes its typical chemistry (C~1%, Cr~1.5%, Mn~0.8%, Si~0.6%). *Note: Exact mapping to EN may vary.* | | **Germany (DIN / W-Nr.)** | **100CrMnSi6-4 / ~1.3538** | Similar variant. | | **ISO** | **ISO 683-17: 100CrMnSi4-6** | Recognized variant within the bearing steel standard. | | **Ovako Designation** | **837R** | "837" correlates with the approximate material number; **"R"** denotes a specific, refined quality level or processing route within Ovako. | ## **Chemical Composition (Typical - %)** The composition is defined by balanced alloying with elevated silicon. | Element | Content (%) | Role | | :--- | :--- | :--- | | **Carbon (C)** | 0.95 - 1.10 | Provides the basis for high-carbon martensite and carbide formation. | | **Chromium (Cr)** | 1.40 - 1.70 | Enhances hardenability and promotes wear-resistant chromium carbides. | | **Manganese (Mn)** | 0.60 - 1.00 | Increases hardenability and strength. | | **Silicon (Si)** | **0.50 - 0.70** | **Key alloying element.** Powerful solid solution strengthener; significantly increases tempering resistance; improves toughness. | | **Sulfur (S)** | ≤ 0.010 | Kept low for good transverse properties. | | **Phosphorus (P)** | ≤ 0.020 | Kept low. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Typical After Hardening & Tempering)** *Properties are highly dependent on heat treatment parameters (austenitizing temperature, quenching medium, tempering temperature).* * **Hardness (Hardened & Tempered):** **59 - 63 HRC** (typical for bearing applications) * **Ultimate Tensile Strength (UTS):** **2000 - 2300 MPa** * **Yield Strength (0.2% offset):** **1600 - 1900 MPa** (Benefiting from Si strengthening) * **Elongation at Break:** ~2-5% * **Reduction of Area:** ~15-30% * **Impact Toughness (Charpy V-notch):** Typically higher than standard 100Cr6 at equivalent hardness due to Si effect. * **Fatigue Strength:** Good rolling contact and bending fatigue resistance. ## **Typical Applications** This material is specified for high-performance components where standard 100Cr6 may not provide sufficient strength or toughness. * **High-Stress Rolling Bearings:** Large-diameter bearings, slewing rings, and bearing components in wind turbines, heavy machinery, and gearboxes subjected to high dynamic loads. * **Critical Gearing Components:** Gears and pinions requiring high surface durability and a strong, tough core to resist tooth bending fatigue. * **Precision Machine Tool Components:** Spindles, arbors, and heavy-duty rollers requiring high stiffness, wear resistance, and dimensional stability. * **Automotive Performance and Racing Components:** High-load transmission parts, camshafts, and valve train components. * **Specialized Tooling and Wear Parts:** Dies, forming tools, and wear plates where a combination of high hardness and good toughness is needed to resist chipping and cracking. ## **Processing Guidelines (General)** * **Machining:** Best performed in a soft-annealed or spheroidize annealed condition (~200 HB). * **Heat Treatment:** 1. **Preheating:** Recommended to ~650-700°C. 2. **Austenitizing:** ~830-860°C in a protective atmosphere. Soaking time is important for carbide dissolution. 3. **Quenching:** Oil quenching is typical. High hardenability allows for good properties in moderate sections. 4. **Tempering:** **Double tempering is strongly recommended.** Due to high Si content, tempering in the range of 180-220°C can optimize toughness without significant hardness loss. The exact temperature depends on the desired final hardness. * **Grinding:** Performed after hardening to achieve final dimensions and surface finish. Proper cooling is essential to avoid grinding burns. ## **Summary** **Ovako 100CrMnSi6-4 837R Steel** is a **high-performance alloy engineered for applications demanding more than standard bearing steel can offer**. Its elevated silicon content provides a distinct advantage in terms of **inherent strength, tempering stability, and toughness**, creating a material that excels under high-stress conditions. For engineers designing critical components where failure is not an option—such as in large-scale energy infrastructure, heavy industrial equipment, or high-performance mechanical systems—the 837R grade provides a reliable, enhanced material solution. It represents a strategic choice when the design requires pushing the limits of strength and durability within the through-hardened bearing steel family. -:- For detailed product information, please contact sales. -: Ovako 100CrMnSi6-4 837R Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5290 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 100CrMnSi6-4 837R Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100CrMnSi6-4 837R Steel Rod -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100CrMnSi6-4 837R Steel Rod -:- For detailed product information, please contact sales. -:

Packing of Ovako 100CrMnSi6-4 837R Steel Rod -:- 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 Rod 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 1761 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