10B20 Steel Seamless tube

10B20 Steel Seamless tube Product Information -:- For detailed product information, please contact sales. -: 10B20 Steel Seamless tube Synonyms -:- For detailed product information, please contact sales. -:

10B20 Steel Product Information -:- For detailed product information, please contact sales. -: # 10B20 Steel Product Technical Datasheet ## 1. Overview 10B20 steel is a low-carbon boron-treated steel designed for applications requiring good hardenability and machinability. The addition of boron significantly enhances the hardenability of this steel without substantially increasing its carbon content, making it suitable for case-hardened components that require a hard surface and a tough core. ## 2. Chemical Composition (Weight %) | Element | Min (%) | Max (%) | Typical Value (%) | |---------|---------|---------|-------------------| | Carbon (C) | 0.18 | 0.23 | 0.20 | | Manganese (Mn) | 0.70 | 1.00 | 0.85 | | Phosphorus (P) | - | 0.035 | 0.015 | | Sulfur (S) | - | 0.035 | 0.025 | | Silicon (Si) | - | 0.40 | 0.25 | | Boron (B) | 0.0005 | 0.003 | 0.0015 | | Iron (Fe) | Balance | Balance | Balance | *Note: Boron content is critical and typically controlled within a narrow range to optimize hardenability.* ## 3. Physical & Mechanical Properties | Property | Typical Value / Condition | |----------|---------------------------| | **Density** | 7.85 g/cm³ (0.284 lb/in³) | | **Melting Point** | Approx. 1420-1460°C (2588-2660°F) | | **Modulus of Elasticity** | 190-210 GPa (27.5-30.5 x 10^6 psi) | | **Poisson's Ratio** | 0.29 | | **Thermal Conductivity** | 46-50 W/m·K (at 100°C) | | **Coefficient of Thermal Expansion** | 11.5 x 10^-6 /K (20-100°C) | | **Machinability** | Good (compared to standard carbon steels, ~70% of 1212 steel baseline) | | **Weldability** | Fair (Pre-heating and post-weld heat treatment may be required) | ### Typical Mechanical Properties (After Case Hardening) | Condition | Surface Hardness (HRC) | Core Tensile Strength | Core Yield Strength | Core Elongation (%) | |-----------|------------------------|------------------------|---------------------|---------------------| | Carburized & Quenched | 58-63 HRC | 850-1000 MPa | 550-700 MPa | 10-15% | ## 4. Heat Treatment Characteristics 10B20 is primarily designed for **carburizing (case hardening)**. - **Carburizing Temperature:** 900-930°C (1650-1700°F) - **Quenching:** Oil quenching is commonly used. - **Tempering:** 150-200°C (300-390°F) to relieve stresses without significantly reducing surface hardness. - **Effective Case Depth:** Can be controlled to achieve depths from 0.25 mm to 2.0 mm (0.010" to 0.080") based on time at temperature. ## 5. Product Forms & Availability - Hot-rolled or cold-drawn bars (rounds, flats, hexagons, squares) - Wire rods - Forging stock - Sheets and strips (less common) ## 6. Primary Applications 10B20 steel is widely used in manufacturing components that require a wear-resistant surface and a strong, impact-resistant core. - **Automotive Industry:** - Fasteners (high-strength bolts, screws, studs) - Gears and shafts (secondary, non-critical) - Clutch components - Steering system parts - **General Machinery:** - Pins and bushings - Chain parts - Agricultural equipment components - Hand tools requiring case hardening ## 7. International Standards & Cross-References | Country/Region | Standard Designation | Similar/Grade Name | |----------------|----------------------|---------------------| | **United States** | ASTM A29 / A304 | 10B20, SAE J404 (10B20) | | **International** | ISO 683-18 | Not directly equivalent; similar to type 1.7131 (Germany) | | **Japan** | JIS G4057 | Not a direct standard grade; similar concept to boron steels in JIS. | | **Germany** | DIN EN 10083-3 | 1.7131 (20MnB5) - *Note: This is a close analog but with slightly different Mn range.* | | **China** | GB/T 3077 | 20MnB | *Important Note:* While 10B20 is a specific SAE/AISI designation, international equivalents may have minor variations in chemical ranges. 20MnB5 (1.7131) is the most common European equivalent and is often used interchangeably for similar applications, though exact specifications should be verified for critical uses. ## 8. Key Advantages 1. **Cost-Effective Hardenability:** Boron addition provides hardenability similar to higher-alloy steels at a lower cost. 2. **Good Machinability:** Suitable for high-volume production of parts requiring significant machining prior to heat treatment. 3. **Good Core Toughness:** Low carbon core remains ductile and tough after case hardening. 4. **Wear Resistance:** When properly carburized and quenched, it achieves excellent surface hardness for wear applications. ## 9. Limitations & Considerations - **Not for High-Temperature Applications:** Loses core strength at elevated temperatures. - **Limited Section Size:** Hardenability, while improved by boron, is still limited compared to high-alloy steels. Maximum effective hardening diameter is typically under 50 mm (2 inches) for full hardening. - **Boron Sensitivity:** The hardenability effect is sensitive to the precise boron content and the presence of nitrogen; production must be well-controlled. ## 10. Compliance & Certification Material can typically be supplied with compliance to ASTM A29 and other relevant standards, along with applicable test reports (e.g., chemical analysis, hardenability data). --- *Disclaimer: This datasheet provides general information. For critical applications, consult the specific material standard and engage with qualified metallurgical engineers. Properties can vary based on manufacturing process, heat treatment, and section size.* -:- For detailed product information, please contact sales. -: 10B20 Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4774 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. -: 10B20 Steel Properties -:- For detailed product information, please contact sales. -:

Applications of 10B20 Steel Seamless tube -:- For detailed product information, please contact sales. -: Chemical Identifiers 10B20 Steel Seamless tube -:- For detailed product information, please contact sales. -:

Packing of 10B20 Steel Seamless tube -:- 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 Seamless tube 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 1245 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