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100CrMnMoSi8
100CrMnMoSi8-4-6 is a high-carbon alloy bearing steel that meets the stringent requirements of German standard DIN EN 10083-3, recognized as premium wear-resistant material. Its exceptional hardness, superior wear resistance, excellent hardenability, and outstanding contact fatigue resistance make it indispensable in manufacturing high-end bearings and precision mechanical wear-resistant components. Produced through a precision process involving high-quality scrap steel and alloying elements such as Cr, Mn, Mo, and Si, this steel undergoes electric arc furnace smelting, electroslag remelting refinement, and forging to achieve precise chemical composition control with minimal impurities (P≤0.025%, S≤0.025%). The resulting material features a uniformly dense microstructure and finely distributed carbides. Key characteristics include: -Heat-treated hardness of HRC60-65, ensuring exceptional wear resistance and compressive strength to withstand high-impact rolling friction; -Superior hardenability maintaining uniform quenched microstructure even in 100mm thick sections; -Outstanding contact fatigue resistance enabling long-term operation under high-speed rotation and heavy loads without failure; -Balanced toughness and machinability for complex wear-resistant parts. Whether for precision bearings, gears, machine tool spindles, or wear-resistant bushings, 100CrMnMoSi8-4-6 delivers stable high-performance, ensuring reliable equipment operation and durability. This steel is the preferred choice for high-end mechanical manufacturing applications requiring wear resistance and heavy-load performance.
The 100CrMnMoSi8-4-6 products showcased here cover a wide range of specifications, designed to meet the processing and application requirements of various high-end wear-resistant components. The specific models and detailed parameters are as follows:
- Round steel/rod specifications: 100CrMnMoSi8-4-6-Φ (diameter) × L (length), with diameters ranging from 5mm to 300mm and standard lengths of 6000mm. Customized cutting is available upon request (minimum cut length: 50mm). Precision grades include standard (±0.5mm), precision (±0.1mm), and ultra-precision (±0.05mm), suitable for applications such as bearing rings, rolling elements, and machine tool spindles.
- Plate specifications: 100CrMnMoSi8-4-6-δ (thickness) × W (width) × L (length), with thickness ranging from 3mm to 150mm, standard widths of 1000mm, 1220mm, and 1500mm, and customizable lengths of 2000mm or 3000mm. Surface treatments include annealing, pickling, and polishing, making it suitable for manufacturing large bearing housings, wear-resistant liners, precision mold bases, and other components.
- Forged parts specifications: 100CrMnMoSi8-4-6 alloy, dimensions ranging from 100×100×100mm to 600×600×600mm. Customized forgings are available. Through multi-pass hot working, the parts achieve fine-grained microstructure, dense internal organization, and more uniform carbide distribution, resulting in superior wear resistance and mechanical properties. Ideal for manufacturing large heavy-duty bearing rings, gears, and other integral components.
- Pipe specifications: 100CrMnMoSi8-4-6-Φ (outer diameter) × δ (wall thickness) × L (length), with outer diameters ranging from 10mm to 200mm and wall thicknesses from 2mm to 20mm. Standard length is 6000mm, with customizable cutting options. The surface is annealed, suitable for applications such as hollow bearing sleeves and wear-resistant transmission shaft sleeves.
- Compliance standard: DIN EN 10083-3:2006 (German standard), equivalent to the performance requirements of similar grades in GB/T 3077-2015, ensuring product quality meets high-end alloy bearing steel industry specifications. Material certificates, heat treatment reports, and third-party inspection reports are available upon request.
- Chemical composition (mass percentage,%): C 0.95-1.05, Si 0.50-0.80, Mn 0.80-1.10, P ≤0.025, S ≤0.025, Cr 1.30-1.60, Mo 0.15-0.25, Ni ≤0.30, Cu ≤0.25. The precise composition ratio ensures excellent hardness, wear resistance, and hardenability, which are key to its high-performance core.
- Heat treatment parameters: ① Annealing: 830-850°C for 2-4 hours with furnace cooling, achieving hardness ≤217HBW for machinability; ② Quenching: 850-880°C with oil cooling, reaching HRC62-65; ③ Tempering: 150-200°C for 2-3 hours with air cooling to room temperature, stabilizing hardness at HRC60-65 with ≤5% residual austenite. Process parameters can be customized based on part dimensions and operational requirements.
The 100CrMnMoSi8-4-6 product features a well-defined appearance and stringent precision control: The round steel/rod surfaces exhibit uniform silver-gray metallic luster, free from oxide scale accumulation, cracks, inclusions, or porosity defects. They demonstrate excellent diameter consistency without noticeable bending deformation, with precision-grade surface roughness Ra ≤ 0.8μm. The sheet metal surfaces are smooth and flat, with no burrs on edges and neat cutting surfaces, maintaining dimensional deviations within ±0.05mm. Forged parts show uniform forging marks, free from flash or cracks. The pipes feature smooth inner walls without burrs, uniform outer diameters and wall thicknesses, and no oval deformation. The overall appearance showcases superior quality, reflecting refined and precision-formed craftsmanship, and is ready for subsequent precision machining and heat treatment.
Metallographic analysis reveals that the annealed microstructure of 100CrMnMoSi8-4-6 steel consists of pearlite and networked carbides, with uniformly distributed fine carbides and grain sizes controlled at ASTM 7-8 level, facilitating mechanical processing and subsequent heat treatment. After quenching and tempering, the microstructure transforms into fine needle-like martensite with dispersed carbides (≤0.5μm), showing no significant decarburization or carbon deficiency, demonstrating excellent structural stability. The electroslag remelting process effectively removes internal impurities, resulting in minimal shrinkage cavities, porosity, and segregation defects. With a density exceeding 99.8%, the steel ensures long-term operational stability under heavy loads and high-speed rotation conditions by preventing component failure due to internal defects.
- Hardness: The annealed state hardness ≤217HBW, suitable for precision machining; after quenching and tempering, the hardness stabilizes at HRC60-65 with uniform distribution, deviation not exceeding ±1HRC, effectively resisting friction and wear under heavy loads, thereby extending the service life of wear-resistant components.
- Mechanical properties (after quenching and tempering): Tensile strength ≥1800MPa, yield strength ≥1500MPa, elongation at break ≥8%, reduction of area at break ≥20%, impact toughness αk ≥40J/cm² (at room temperature). It exhibits excellent strength-to-toughness balance, capable of withstanding heavy loads and minor impacts, thereby preventing brittle fracture of components during operation.
- Contact fatigue resistance: The contact fatigue life (L10) exceeds 1000 hours under 3000MPa load and 3000r/min speed, demonstrating exceptional performance. This feature effectively accommodates high-speed, high-load operating conditions, reduces fatigue failure risks, and extends equipment service life.
- Hardenability and Wear Resistance: Exhibits excellent hardenability, maintaining core hardness above HRC58 in a 100mm thick cross-section after quenching. Oil cooling alone suffices for quenching, simplifying heat treatment processes. The material demonstrates exceptional wear resistance, with wear rates ≤0.01mm/1000h (under heavy-duty friction conditions), far surpassing conventional structural steels and ideal for long-term friction and wear applications.
- Machinability and weldability: The annealed state exhibits adequate machinability for turning, milling, and grinding operations. Weldability is average, requiring preheating to 200-300°C before welding and immediate tempering post-welding to prevent cracks, making it suitable for welding simple-shaped components.
Using high-purity alloy materials and a dual-refining process combining electric arc furnace smelting with electroslag remelting, we strictly control chemical composition and impurity levels (P, S ≤0.025%) to ensure pure steel with uniform microstructure. Through precision forging and annealing, we optimize carbide distribution and grain refinement, eliminating material-related part failure risks at source. This provides a solid foundation for manufacturing and using high-end wear-resistant components.
The core advantage lies in its exceptional hardness and wear resistance, achieving HRC60-65 hardness after quenching and tempering, which effectively resists heavy-duty friction and wear. Compared to conventional bearing steel, its wear resistance is enhanced by 30%-50%. Additionally, it boasts excellent hardenability and contact fatigue resistance, enabling long-term adaptation to high-speed and heavy-load conditions while preventing fatigue failure. The balanced strength-toughness ratio allows it to withstand minor impacts, ensuring stable operation of components under complex working conditions.
The product range covers various forms including round steel/bar, plates, forgings, and pipes, with a wide selection of standard specifications available in all forms. Thickness ranges from 3mm to 150mm and diameter from 5mm to 300mm. Customized solutions are supported for irregular dimensions and special precision grades (ultra-precision grade ±0.05mm), along with customized heat treatment and surface treatment services. This eliminates the need for additional secondary processing by customers, enabling direct adaptation to the design and manufacturing requirements of high-end wear-resistant components while saving processing time and costs.
Engineered for high-end wear-resistant components, this solution meets diverse operational demands including high-speed rotation, heavy loads, and friction wear. It serves multiple high-end industries such as precision machinery, automotive, machine tools, and construction equipment with exceptional adaptability. Featuring superior hardenability and wear resistance, it directly fulfills the stringent precision and service life requirements of advanced equipment, thereby enhancing overall operational performance.
Every batch undergoes rigorous quality control throughout the entire production process, including chemical composition analysis, metallographic structure examination, hardness testing, tensile strength evaluation, impact toughness assessment, contact fatigue testing, ultrasonic testing (UT), and magnetic particle testing (MT). These comprehensive tests ensure all specifications comply with the German standard DIN EN 10083-3 and meet customer requirements. We provide complete test reports, material certifications, and heat treatment records, and support third-party retesting by accredited institutions. This guarantees superior quality assurance, giving customers peace of mind in their usage.
100CrMnMoSi8-4-6, renowned for its exceptional hardness, wear resistance, and comprehensive mechanical properties, is extensively utilized in the production of high-end wear-resistant components and precision mechanical parts for complex operating conditions. The specific applications are as follows:
This premium material is the go-to choice for high-end bearing manufacturing, ideal for producing precision components like deep groove ball bearings, angular contact ball bearings, tapered roller bearings, and cylindrical roller bearings. It enables the production of critical parts including bearing rings and rolling elements (steel balls/rollers), widely used in precision machine tools, high-speed motors, and heavy-duty equipment. The material ensures stable operation under high-speed rotation (≥5000 rpm) and heavy loads, effectively resisting rolling friction wear to maintain bearing accuracy and longevity while enhancing equipment reliability.
These components are manufactured for wear-resistant transmission parts in automobiles and construction machinery, including automotive transmission gears, drive axle gears, camshafts, crankshafts, as well as hydraulic pump shafts, wear-resistant bushings, and pin shafts in construction equipment. Their high hardness and wear resistance enable them to withstand high-frequency friction and heavy-duty impacts, ensuring stable operation of transmission systems, extending component service life, and enhancing the operational efficiency of vehicles and construction machinery.
This material is designed for manufacturing precision wear-resistant components in machine tools, including spindles, lead screws, guides, and gears. It is widely used in high-precision equipment such as CNC machines, machining centers, and grinding machines. With its outstanding wear resistance and dimensional stability, it reduces part wear, improves operational and machining accuracy, lowers maintenance costs, and extends the service life of machine tools.
The company manufactures wear-resistant molds and tooling components, such as cold stamping dies, drawing dies, wear-resistant liners, and tooling fixtures, suitable for metal processing and stamping forming applications. Their high hardness and wear resistance effectively resist friction and wear between molds and workpieces, extending mold service life, improving the accuracy and consistency of formed parts, and reducing production costs.
Beyond its primary applications, 100CrMnMoSi8-4-6 is also utilized in manufacturing wear-resistant components for high-end instruments, petrochemical wear-resistant valves, and wear-resistant bases for precision measuring tools. It meets the wear resistance and heavy-load demands of multiple high-end industries, including precision machinery, automotive, and machine tools, providing material support for the efficient operation of various advanced equipment.
100CrMnMoSi8-4-6 is a high-carbon alloy bearing steel that meets the stringent requirements of German standard DIN EN 10083-3, recognized as premium wear-resistant material. Its exceptional hardness, superior wear resistance, excellent hardenability, and outstanding contact fatigue resistance make it indispensable in manufacturing high-end bearings and precision mechanical wear-resistant components. Produced through a precision process involving high-quality scrap steel and alloying elements such as Cr, Mn, Mo, and Si, this steel undergoes electric arc furnace smelting, electroslag remelting refinement, and forging to achieve precise chemical composition control with minimal impurities (P≤0.025%, S≤0.025%). The resulting material features a uniformly dense microstructure and finely distributed carbides. Key characteristics include: -Heat-treated hardness of HRC60-65, ensuring exceptional wear resistance and compressive strength to withstand high-impact rolling friction; -Superior hardenability maintaining uniform quenched microstructure even in 100mm thick sections; -Outstanding contact fatigue resistance enabling long-term operation under high-speed rotation and heavy loads without failure; -Balanced toughness and machinability for complex wear-resistant parts. Whether for precision bearings, gears, machine tool spindles, or wear-resistant bushings, 100CrMnMoSi8-4-6 delivers stable high-performance, ensuring reliable equipment operation and durability. This steel is the preferred choice for high-end mechanical manufacturing applications requiring wear resistance and heavy-load performance.
The 100CrMnMoSi8-4-6 products showcased here cover a wide range of specifications, designed to meet the processing and application requirements of various high-end wear-resistant components. The specific models and detailed parameters are as follows:
- Round steel/rod specifications: 100CrMnMoSi8-4-6-Φ (diameter) × L (length), with diameters ranging from 5mm to 300mm and standard lengths of 6000mm. Customized cutting is available upon request (minimum cut length: 50mm). Precision grades include standard (±0.5mm), precision (±0.1mm), and ultra-precision (±0.05mm), suitable for applications such as bearing rings, rolling elements, and machine tool spindles.
- Plate specifications: 100CrMnMoSi8-4-6-δ (thickness) × W (width) × L (length), with thickness ranging from 3mm to 150mm, standard widths of 1000mm, 1220mm, and 1500mm, and customizable lengths of 2000mm or 3000mm. Surface treatments include annealing, pickling, and polishing, making it suitable for manufacturing large bearing housings, wear-resistant liners, precision mold bases, and other components.
- Forged parts specifications: 100CrMnMoSi8-4-6 alloy, dimensions ranging from 100×100×100mm to 600×600×600mm. Customized forgings are available. Through multi-pass hot working, the parts achieve fine-grained microstructure, dense internal organization, and more uniform carbide distribution, resulting in superior wear resistance and mechanical properties. Ideal for manufacturing large heavy-duty bearing rings, gears, and other integral components.
- Pipe specifications: 100CrMnMoSi8-4-6-Φ (outer diameter) × δ (wall thickness) × L (length), with outer diameters ranging from 10mm to 200mm and wall thicknesses from 2mm to 20mm. Standard length is 6000mm, with customizable cutting options. The surface is annealed, suitable for applications such as hollow bearing sleeves and wear-resistant transmission shaft sleeves.
- Compliance standard: DIN EN 10083-3:2006 (German standard), equivalent to the performance requirements of similar grades in GB/T 3077-2015, ensuring product quality meets high-end alloy bearing steel industry specifications. Material certificates, heat treatment reports, and third-party inspection reports are available upon request.
- Chemical composition (mass percentage,%): C 0.95-1.05, Si 0.50-0.80, Mn 0.80-1.10, P ≤0.025, S ≤0.025, Cr 1.30-1.60, Mo 0.15-0.25, Ni ≤0.30, Cu ≤0.25. The precise composition ratio ensures excellent hardness, wear resistance, and hardenability, which are key to its high-performance core.
- Heat treatment parameters: ① Annealing: 830-850°C for 2-4 hours with furnace cooling, achieving hardness ≤217HBW for machinability; ② Quenching: 850-880°C with oil cooling, reaching HRC62-65; ③ Tempering: 150-200°C for 2-3 hours with air cooling to room temperature, stabilizing hardness at HRC60-65 with ≤5% residual austenite. Process parameters can be customized based on part dimensions and operational requirements.
The 100CrMnMoSi8-4-6 product features a well-defined appearance and stringent precision control: The round steel/rod surfaces exhibit uniform silver-gray metallic luster, free from oxide scale accumulation, cracks, inclusions, or porosity defects. They demonstrate excellent diameter consistency without noticeable bending deformation, with precision-grade surface roughness Ra ≤ 0.8μm. The sheet metal surfaces are smooth and flat, with no burrs on edges and neat cutting surfaces, maintaining dimensional deviations within ±0.05mm. Forged parts show uniform forging marks, free from flash or cracks. The pipes feature smooth inner walls without burrs, uniform outer diameters and wall thicknesses, and no oval deformation. The overall appearance showcases superior quality, reflecting refined and precision-formed craftsmanship, and is ready for subsequent precision machining and heat treatment.
Metallographic analysis reveals that the annealed microstructure of 100CrMnMoSi8-4-6 steel consists of pearlite and networked carbides, with uniformly distributed fine carbides and grain sizes controlled at ASTM 7-8 level, facilitating mechanical processing and subsequent heat treatment. After quenching and tempering, the microstructure transforms into fine needle-like martensite with dispersed carbides (≤0.5μm), showing no significant decarburization or carbon deficiency, demonstrating excellent structural stability. The electroslag remelting process effectively removes internal impurities, resulting in minimal shrinkage cavities, porosity, and segregation defects. With a density exceeding 99.8%, the steel ensures long-term operational stability under heavy loads and high-speed rotation conditions by preventing component failure due to internal defects.
- Hardness: The annealed state hardness ≤217HBW, suitable for precision machining; after quenching and tempering, the hardness stabilizes at HRC60-65 with uniform distribution, deviation not exceeding ±1HRC, effectively resisting friction and wear under heavy loads, thereby extending the service life of wear-resistant components.
- Mechanical properties (after quenching and tempering): Tensile strength ≥1800MPa, yield strength ≥1500MPa, elongation at break ≥8%, reduction of area at break ≥20%, impact toughness αk ≥40J/cm² (at room temperature). It exhibits excellent strength-to-toughness balance, capable of withstanding heavy loads and minor impacts, thereby preventing brittle fracture of components during operation.
- Contact fatigue resistance: The contact fatigue life (L10) exceeds 1000 hours under 3000MPa load and 3000r/min speed, demonstrating exceptional performance. This feature effectively accommodates high-speed, high-load operating conditions, reduces fatigue failure risks, and extends equipment service life.
- Hardenability and Wear Resistance: Exhibits excellent hardenability, maintaining core hardness above HRC58 in a 100mm thick cross-section after quenching. Oil cooling alone suffices for quenching, simplifying heat treatment processes. The material demonstrates exceptional wear resistance, with wear rates ≤0.01mm/1000h (under heavy-duty friction conditions), far surpassing conventional structural steels and ideal for long-term friction and wear applications.
- Machinability and weldability: The annealed state exhibits adequate machinability for turning, milling, and grinding operations. Weldability is average, requiring preheating to 200-300°C before welding and immediate tempering post-welding to prevent cracks, making it suitable for welding simple-shaped components.
Using high-purity alloy materials and a dual-refining process combining electric arc furnace smelting with electroslag remelting, we strictly control chemical composition and impurity levels (P, S ≤0.025%) to ensure pure steel with uniform microstructure. Through precision forging and annealing, we optimize carbide distribution and grain refinement, eliminating material-related part failure risks at source. This provides a solid foundation for manufacturing and using high-end wear-resistant components.
The core advantage lies in its exceptional hardness and wear resistance, achieving HRC60-65 hardness after quenching and tempering, which effectively resists heavy-duty friction and wear. Compared to conventional bearing steel, its wear resistance is enhanced by 30%-50%. Additionally, it boasts excellent hardenability and contact fatigue resistance, enabling long-term adaptation to high-speed and heavy-load conditions while preventing fatigue failure. The balanced strength-toughness ratio allows it to withstand minor impacts, ensuring stable operation of components under complex working conditions.
The product range covers various forms including round steel/bar, plates, forgings, and pipes, with a wide selection of standard specifications available in all forms. Thickness ranges from 3mm to 150mm and diameter from 5mm to 300mm. Customized solutions are supported for irregular dimensions and special precision grades (ultra-precision grade ±0.05mm), along with customized heat treatment and surface treatment services. This eliminates the need for additional secondary processing by customers, enabling direct adaptation to the design and manufacturing requirements of high-end wear-resistant components while saving processing time and costs.
Engineered for high-end wear-resistant components, this solution meets diverse operational demands including high-speed rotation, heavy loads, and friction wear. It serves multiple high-end industries such as precision machinery, automotive, machine tools, and construction equipment with exceptional adaptability. Featuring superior hardenability and wear resistance, it directly fulfills the stringent precision and service life requirements of advanced equipment, thereby enhancing overall operational performance.
Every batch undergoes rigorous quality control throughout the entire production process, including chemical composition analysis, metallographic structure examination, hardness testing, tensile strength evaluation, impact toughness assessment, contact fatigue testing, ultrasonic testing (UT), and magnetic particle testing (MT). These comprehensive tests ensure all specifications comply with the German standard DIN EN 10083-3 and meet customer requirements. We provide complete test reports, material certifications, and heat treatment records, and support third-party retesting by accredited institutions. This guarantees superior quality assurance, giving customers peace of mind in their usage.
100CrMnMoSi8-4-6, renowned for its exceptional hardness, wear resistance, and comprehensive mechanical properties, is extensively utilized in the production of high-end wear-resistant components and precision mechanical parts for complex operating conditions. The specific applications are as follows:
This premium material is the go-to choice for high-end bearing manufacturing, ideal for producing precision components like deep groove ball bearings, angular contact ball bearings, tapered roller bearings, and cylindrical roller bearings. It enables the production of critical parts including bearing rings and rolling elements (steel balls/rollers), widely used in precision machine tools, high-speed motors, and heavy-duty equipment. The material ensures stable operation under high-speed rotation (≥5000 rpm) and heavy loads, effectively resisting rolling friction wear to maintain bearing accuracy and longevity while enhancing equipment reliability.
These components are manufactured for wear-resistant transmission parts in automobiles and construction machinery, including automotive transmission gears, drive axle gears, camshafts, crankshafts, as well as hydraulic pump shafts, wear-resistant bushings, and pin shafts in construction equipment. Their high hardness and wear resistance enable them to withstand high-frequency friction and heavy-duty impacts, ensuring stable operation of transmission systems, extending component service life, and enhancing the operational efficiency of vehicles and construction machinery.
This material is designed for manufacturing precision wear-resistant components in machine tools, including spindles, lead screws, guides, and gears. It is widely used in high-precision equipment such as CNC machines, machining centers, and grinding machines. With its outstanding wear resistance and dimensional stability, it reduces part wear, improves operational and machining accuracy, lowers maintenance costs, and extends the service life of machine tools.
The company manufactures wear-resistant molds and tooling components, such as cold stamping dies, drawing dies, wear-resistant liners, and tooling fixtures, suitable for metal processing and stamping forming applications. Their high hardness and wear resistance effectively resist friction and wear between molds and workpieces, extending mold service life, improving the accuracy and consistency of formed parts, and reducing production costs.
Beyond its primary applications, 100CrMnMoSi8-4-6 is also utilized in manufacturing wear-resistant components for high-end instruments, petrochemical wear-resistant valves, and wear-resistant bases for precision measuring tools. It meets the wear resistance and heavy-load demands of multiple high-end industries, including precision machinery, automotive, and machine tools, providing material support for the efficient operation of various advanced equipment.
