CBS-600 Carburizing Bearing and Gear Steel Sheet,Plate

CBS-600 Carburizing Bearing and Gear Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: CBS-600 Carburizing Bearing and Gear Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

CBS-600 Carburizing Bearing and Gear Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Datasheet: CBS-600 Carburizing Bearing and Gear Steel** --- #### **1. Material Overview** **CBS-600** is a **high-performance, low-alloy carburizing steel** specifically engineered for **critical bearing and gear applications**. The designation typically suggests a proprietary or specialized grade optimized for deep **case hardening** via carburizing, followed by quenching and tempering. It is designed to produce components with an **extremely hard, wear-resistant surface case (typically 58-64 HRC)** over a **tough, ductile, and shock-resistant core (typically 30-45 HRC)**. This combination makes it ideal for applications subjected to high contact stresses, rolling/sliding wear, and significant impact or bending loads, such as large bearings, heavy-duty gears, and transmission components. #### **2. Key Material Concept: Optimized for Carburizing Performance** CBS-600 is formulated to excel in the carburizing process, offering advantages over standard carburizing grades (e.g., SAE 8620, 9310): - **Core Toughness:** A carefully balanced low-carbon alloy composition ensures the core develops high strength and exceptional toughness after heat treatment, providing resistance to tooth bending fatigue and shock loading. - **Hardenability Control:** Alloying elements (Ni, Cr, Mo) are optimized to provide sufficient hardenability for the core to transform to a strong, tough microstructure (e.g., tempered martensite or bainite) in large cross-sections, while allowing controlled case hardenability to prevent excessive retained austenite or brittle carbides at the surface. - **Carburizing Response:** The chemistry promotes rapid and uniform carbon diffusion during carburizing, allowing for efficient cycle times and consistent case depth. It also resists intergranular oxidation and maintains fine grain size at carburizing temperatures. - **Dimensional Stability:** Designed to minimize distortion during the carburizing and quenching processes, which is critical for precision gears and bearings. #### **3. International Standard & Cross-References** CBS-600 is likely a **proprietary or trade name** from a specific steel producer or bearing manufacturer (e.g., possibly associated with **The Timken Company** or similar). It does not correspond directly to a common AISI/SAE or EN standard. - **Closest Standard Equivalents:** Its performance targets are similar to premium grades like: - **SAE 4320 / 4320H** (Ni-Cr-Mo steel with good core toughness) - **SAE 8620 / 8620H** (Most common general carburizing steel) - **SAE 9310 / 9310H** (High-Ni gear steel for maximum core toughness) - **DIN 1.6562 / 1.6523 / 1.6657** (e.g., 18CrNiMo7-6, 23MnCrMo5-2) - **"H" Grade Implication:** If available as CBS-600H, it would indicate a **hardenability-controlled version** per standards like ASTM A304. #### **4. Typical Chemical Composition (% by Weight)** *Based on the nomenclature and intended use, a typical composition might be:* | Element | Estimated Range (%) | Key Role in Carburizing | | :--- | :--- | :--- | | **Carbon (C)** | **0.15 – 0.25** | Low core carbon for toughness; provides carbon for diffusion into the case. | | **Manganese (Mn)** | **0.50 – 0.90** | Enhances hardenability and core strength. | | **Silicon (Si)** | **0.15 – 0.35** | Deoxidizer; can be controlled to minimize oxidation during carburizing. | | **Nickel (Ni)** | **0.40 – 1.00** | **Key for core toughness.** Improves low-temperature impact strength and fatigue resistance. | | **Chromium (Cr)** | **0.40 – 1.00** | Enhances case hardenability, wear resistance, and promotes fine carbides in the case. | | **Molybdenum (Mo)** | **0.15 – 0.30** | **Critical.** Increases hardenability (especially core), refines grain, improves high-temperature strength during carburizing, and enhances temper resistance. | | **Sulfur (S)** | **≤ 0.030** | Kept low for optimal transverse properties. | | **Boron (B)** | **May be present** | Trace addition to significantly boost core hardenability cost-effectively. | #### **5. Typical Physical & Mechanical Properties** **A. Physical Properties (Core):** - **Density:** ~7.85 g/cm³ - **Modulus of Elasticity:** ~205 GPa - **Core Hardness (After Heat Treat):** 30-45 HRC (adjustable via tempering) **B. Achieved Properties After Carburizing & Heat Treatment:** - **Surface Case Hardness:** **58 – 64 HRC** - **Effective Case Depth (at 550 HV / 50 HRC):** Typically 0.5mm to 2.5mm+, depending on cycle. - **Core Tensile Strength:** **900 – 1200 MPa** (130 – 174 ksi) - **Core Yield Strength:** **700 – 1000 MPa** (102 – 145 ksi) - **Core Impact Toughness (Charpy V-notch):** **40 – 80 J** (30 – 59 ft-lb) – **Excellent for a hardened component.** - **Surface Compressive Residual Stress:** High, contributing to superior fatigue resistance. - **Bending Fatigue Strength:** Exceptional. - **Contact Fatigue (Pitting) Resistance:** Excellent due to hard case and supportive core. #### **6. Processing & Heat Treatment Characteristics** - **Carburizing:** Typically performed via **gas carburizing** or **low-pressure carburizing (LPC)** at 900-950°C. The steel exhibits good carbon uptake and profile control. - **Quenching:** After carburizing, quenched in **oil** (for moderate sections) or **high-pressure gas** (for minimal distortion). The alloy design supports deep hardening of the core. - **Tempering:** Low-temperature tempering (150-200°C) is used to relieve stresses while maintaining high case hardness. - **Sub-Zero Treatment:** Often applied to transform retained austenite in the case for maximum hardness and dimensional stability. - **Machinability (Pre-Carburize):** Good in the annealed or normalized condition. - **Weldability:** Fair with precautions (preheat, PWHT), but welding after carburizing is not recommended. #### **7. Primary Applications** CBS-600 is specified for the most demanding carburized components: - **Large-Scale Rolling Element Bearings:** **Wind turbine main shaft bearings, large industrial spherical roller bearings, and slewing rings** for cranes and excavators. - **Heavy-Duty & Aerospace Gearing:** **Planetary gear sets for wind turbines, main transmission gears for helicopters, heavy mining truck differential gears, and high-performance racing gearbox gears.** - **Critical Automotive Components:** **High-load differential pinions and ring gears, transmission shafts, and powertrain components** for off-highway and performance vehicles. - **Oil & Gas Drilling Components:** **Large bearing races and heavily loaded gears** in drilling rigs and mud pumps. - **Defense Applications:** **Track drive sprockets, turret drive gears, and other armored vehicle components.** #### **8. Available Forms & Quality** - **Forms:** **Forged blanks, rolled bars, and pre-machined rings** are common, supplied in the annealed or normalized condition for machining. - **Quality:** Expected to be supplied as **"Bearing Quality"** or **"Gear Quality"** with strict controls on non-metallic inclusions, macro-etch quality, and hardenability consistency. Ultrasonic testing is standard for large forgings. #### **9. Comparison with Common Carburizing Grades** | Grade | Typical Core Toughness | Typical Case Hardness | Hardenability | Primary Application Focus | | :--- | :--- | :--- | :--- | :--- | | **SAE 8620** | Good | 58-62 HRC | Moderate | General-purpose gears, small bearings. | | **SAE 9310** | **Excellent** | 58-62 HRC | High | Aerospace gears, high-integrity gears. | | **CBS-600 (Proprietary)** | **Very Good to Excellent** | **58-64 HRC** | **High & Optimized** | **Large bearings & heavy-duty gears requiring optimal case/core balance.** | --- **Disclaimer:** **CBS-600 is likely a proprietary grade.** The information provided is a composite based on the performance implied by its nomenclature and application. **Exact chemical composition, guaranteed properties, and processing guidelines must be obtained from the specific steel supplier or component manufacturer.** This grade represents a premium, application-engineered material where the cost is justified by extended service life, reliability, and performance in extreme conditions. It is not a general-purpose steel. -:- For detailed product information, please contact sales. -: CBS-600 Carburizing Bearing and Gear Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5200 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. -: CBS-600 Carburizing Bearing and Gear Steel Properties -:- For detailed product information, please contact sales. -:

Applications of CBS-600 Carburizing Bearing and Gear Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers CBS-600 Carburizing Bearing and Gear Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of CBS-600 Carburizing Bearing and Gear Steel Sheet/Plate -:- 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 Sheet/Plate 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 1671 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