100CrMo7 824Q Steel Capillary

Ovako 100CrMo7 824Q Steel Capillary, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: Ovako 100CrMo7 824Q Steel Capillary, Spheroidize annealing Synonyms -:- For detailed product information, please contact sales. -:

Ovako 100CrMo7 824Q Steel, Spheroidize annealing Product Information -:- For detailed product information, please contact sales. -: # **Ovako 100CrMo7 824Q Steel – Spheroidize Annealed Condition** ## **Product Overview** Ovako 100CrMo7 824Q is a **high-quality, molybdenum-alloyed bearing steel** supplied in a **spheroidize annealed condition**, representing the **standard premium grade** within Ovako's 100CrMo7 product family. The **"Q"** designation signifies a **Qualified quality level** with **enhanced micro-cleanliness and controlled processing** compared to base-grade materials. This steel combines the proven performance benefits of molybdenum addition—improved hardenability, strength, and toughness—with a refined spheroidized microstructure that ensures excellent machinability and a reliable foundation for subsequent through-hardening heat treatment. It is engineered as a versatile, high-performance feedstock for demanding bearing and mechanical components where consistent quality and predictable behavior are essential. ## **Key Features & Benefits** * **Enhanced Micro-Cleanliness & Fatigue Performance:** The 824Q grade features **reduced levels of non-metallic inclusions** (oxides and sulfides) compared to standard industrial qualities. This improved internal cleanliness directly contributes to **superior rolling contact fatigue (RCF) life and fracture toughness**, offering greater reliability and longer service life for critical components. * **Excellent Machinability:** The spheroidize annealed condition produces a uniform hardness of **190-220 HB** and a fine dispersion of globular carbides. This structure ensures **good chip formation, extended tool life, superior surface finish, and efficient machining** of complex part geometries. * **Superior Hardenability & Property Uniformity:** The molybdenum addition significantly increases hardenability, ensuring **deep and uniform through-hardening** in moderately large sections. The homogeneous "Q" grade microstructure guarantees consistent transformation during heat treatment, resulting in uniform hardness and mechanical properties throughout the component. * **Optimized Toughness at High Hardness:** Molybdenum plays a crucial role in refining the tempered martensite structure, providing **better impact toughness and fracture resistance** than standard 100Cr6 at equivalent hardness levels (60-64 HRC). This offers an added margin of safety against shock loads or overload conditions. * **Reliable & Consistent Quality:** As a defined "Q" grade, it offers guaranteed consistency in chemical composition, microstructure, and annealing response, providing a dependable and predictable material for both manufacturers and end-users in high-stress applications. ## **International Standards & Designations** This product is Ovako's premium quality variant of the standard 100CrMo7 bearing steel. | Region/Standard | Standard Designation | Ovako Designation | Quality Level | | :--- | :--- | :--- | :--- | | **EUR (EN)** | **1.3536 (100CrMo7)** | **100CrMo7 824Q** | **"Q" = Qualified, enhanced cleanliness grade.** | | **ISO** | **ISO 683-17: 100CrMo7** | | Meets and exceeds standard requirements for inclusion control. | | **Germany (DIN)** | **100CrMo7 / 1.3536** | | Comparable to "EP" (Extra Pure) quality levels. | | **USA (AISI/ASTM)** | **No direct equivalent.** | | Considered a premium 52100 + Mo variant. | ## **Chemical Composition (Typical - %)** The composition adheres to strict 100CrMo7 limits with tighter impurity control. | Element | Content (%) | Role & Quality Implication | | :--- | :--- | :--- | | **Carbon (C)** | 0.93 - 1.05 | Provides basis for high-carbon martensite. Uniform distribution is ensured. | | **Chromium (Cr)** | 1.40 - 1.70 | Enhances hardenability and promotes wear-resistant carbides. | | **Molybdenum (Mo)** | **0.15 - 0.25** | **Key alloying element.** Dramatically improves hardenability, toughness, and tempering resistance. | | **Manganese (Mn)** | 0.25 - 0.45 | Increases hardenability. | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer and solid solution strengthener. | | **Sulfur (S)** | **≤ 0.008** | **Low sulfur** – a feature of the Q-grade. Minimizes MnS inclusions to enhance fatigue life and transverse properties. | | **Phosphorus (P)** | **≤ 0.015** | Kept low to maximize toughness. | | **Oxygen [O]** | **< 15 ppm** | Controlled low oxygen content to minimize oxide inclusions. | | **Iron (Fe)** | Balance | | ## **Physical & Mechanical Properties (Spheroidize Annealed Condition)** * **Delivery Condition:** **Spheroidize Annealed (+A)** * **Hardness:** **190 - 220 HB** (Typical aim: ~205 HB) * **Microstructure:** **Uniform dispersion of fine, spheroidized carbides** in a ferritic matrix. * **Tensile Strength:** ~700 - 850 MPa * **Yield Strength (Rp0.2):** ~450 - 600 MPa * **Elongation (A5):** ≥ 18% * **Machinability Rating:** **Excellent** for its alloy class. ## **Properties After Hardening & Tempering (Indicative)** * **Final Hardness:** **60 - 64 HRC** (via standard heat treatment: 840-860°C austenitize, oil quench, temper at 160-200°C) * **Ultimate Tensile Strength:** ~2100 - 2400 MPa * **Yield Strength:** ~1700 - 2000 MPa * **Impact Toughness:** **Good to Very Good**, superior to standard 100Cr6. * **Fatigue Performance:** **Very Good**, benefiting from cleaner microstructure. ## **Typical Applications** This annealed material is the preferred feedstock for high-performance components across various industries. * **High-Reliability Industrial Bearings:** Bearings for wind turbine gearboxes, large electric motors, high-power pumps, and heavy-duty gearboxes. * **Automotive Performance Components:** Transmission bearings, differential components, and high-stress wheel bearings for passenger and commercial vehicles. * **Aerospace & Defense Components:** Critical bearings and rotating parts in auxiliary systems, actuators, and drives. * **Machine Tool & Precision Spindle Components:** Spindles, arbors, and high-precision rollers requiring a combination of stiffness, wear resistance, and toughness. * **General High-Performance Mechanical Parts:** Gears, shafts, and pins where enhanced material properties are specified. ## **Processing Guidelines** * **Machining:** All machining should be completed in the soft, spheroidize annealed state for optimal efficiency and tool life. * **Heat Treatment (Customer Process):** 1. **Preheating:** Recommended at 650-700°C. 2. **Austenitizing:** 840-860°C in a protective atmosphere. 3. **Quenching:** Oil quenching. The high Mo content ensures good hardenability even with moderate quench severity. 4. **Tempering:** **Double tempering** at 160-220°C is recommended to achieve optimal toughness and dimensional stability. * **Grinding:** Perform final grinding after hardening. The consistent microstructure facilitates stable grinding operations. ## **Summary** **Ovako 100CrMo7 824Q Steel in the Spheroidize Annealed condition** is the **definitive premium-quality feedstock** for manufacturers of high-performance through-hardened components. It delivers the well-established advantages of molybdenum-alloyed bearing steel—superior hardenability and toughness—in a consistently refined and machinable form. The "Q" grade assurance of enhanced cleanliness provides a tangible improvement in fatigue life and reliability. For applications demanding a step-change in performance over standard bearing steels without venturing into ultra-premium cost tiers, 824Q offers an optimal balance of advanced metallurgical benefits, manufacturing efficiency, and proven in-service performance. It is the reliable choice for engineering excellence in demanding mechanical systems. -:- For detailed product information, please contact sales. -: Ovako 100CrMo7 824Q Steel, Spheroidize annealing Specification Dimensions Size： Diameter 20-1000 mm Length <5297 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 100CrMo7 824Q Steel, Spheroidize annealing Properties -:- For detailed product information, please contact sales. -:

Applications of Ovako 100CrMo7 824Q Steel Capillary, Spheroidize annealing -:- For detailed product information, please contact sales. -: Chemical Identifiers Ovako 100CrMo7 824Q Steel Capillary, Spheroidize annealing -:- For detailed product information, please contact sales. -:

Packing of Ovako 100CrMo7 824Q 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 1768 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