SAE 1518 Carbon Steel Flange

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: SAE 1518 Carbon Steel Flange, Composition Spec Product Information -:- For detailed product information, please contact sales. -: SAE 1518 Carbon Steel Flange, Composition Spec Synonyms -:- For detailed product information, please contact sales. -:

SAE 1518 Carbon Steel, Composition Spec Product Information -:- For detailed product information, please contact sales. -: # **Technical Data Sheet: SAE 1518 Carbon Steel (Composition Specification)** ## **1. MATERIAL OVERVIEW** **SAE 1518** is a **low-carbon, medium-manganese carbon steel** classified under the 1500 series of SAE standard steels. It is specifically designed to offer improved hardenability over plain carbon steels through controlled manganese addition while maintaining good formability and weldability. This grade is commonly supplied in various conditions including hot-rolled, cold-drawn, and annealed states, serving as a versatile material for general engineering applications requiring moderate strength and good machinability. ## **2. INTERNATIONAL STANDARD DESIGNATIONS** | Standard System | Designation | Equivalent Standard | |----------------|-------------|---------------------| | **SAE/AISI** | **1518** | SAE J403 | | **UNS** | **G15180** | Unified Numbering System | | **ASTM** | **A29/A29M** | Grade 1518 | | **EN (Europe)** | **17Mn4** (Closest) | EN 10083-2 (1.0844) | | **DIN (Germany)** | **17Mn4** | DIN EN 10083-2 | | **JIS (Japan)** | **SMnC420** (Similar) | JIS G4052 | | **ISO** | **Type 17Mn4** | ISO 683-18 | | **GB (China)** | **15Mn** | GB/T 699 | ## **3. CHEMICAL COMPOSITION SPECIFICATION** ### **Standard Composition Ranges (SAE J403)** | Element | Minimum (%) | Maximum (%) | Typical (%) | Metallurgical Function | |---------|-------------|-------------|-------------|------------------------| | **Carbon (C)** | 0.15 | 0.21 | 0.18 | Primary strengthening element | | **Manganese (Mn)** | 1.10 | 1.40 | 1.25 | Enhances hardenability, strength | | **Phosphorus (P)** | - | 0.040 | 0.020 | Residual impurity (controlled) | | **Sulfur (S)** | - | 0.050 | 0.025 | Residual impurity (controlled) | | **Silicon (Si)** | 0.15 | 0.35 | 0.25 | Deoxidizer, solid solution strengthening | | **Iron (Fe)** | Balance | Balance | Balance | Base metal | ### **Composition Notes:** - **Manganese-to-Carbon Ratio**: Approximately 7:1, providing good hardenability - **Sulfur Content**: Controlled to ensure adequate hot workability - **Silicon Range**: Standard for killed steel production ### **Modified/Variant Grades:** - **SAE 1518H**: Hardenability-controlled version with guaranteed Jominy bands - **Boron-Treated 1518**: 0.0005-0.003% B for enhanced hardenability - **Resulturized 1518**: Higher sulfur (0.08-0.13%) for improved machinability ## **4. PHYSICAL PROPERTIES** | Property | Value | Unit | Conditions/Notes | |----------|-------|------|------------------| | **Density** | 7.85 | g/cm³ | At 20°C (68°F) | | **Melting Point** | 1510-1530 | °C | Liquidus temperature range | | **Modulus of Elasticity** | 200-205 | GPa | 29,000-29,700 ksi | | **Shear Modulus** | 78-80 | GPa | 11,300-11,600 ksi | | **Poisson's Ratio** | 0.29 | - | Typical for steel | | **Thermal Conductivity** | 49-52 | W/m·K | At 20°C | | **Coefficient of Thermal Expansion** | 11.7 | μm/m·°C | 20-200°C range | | **Specific Heat Capacity** | 475 | J/kg·K | At 20°C | | **Electrical Resistivity** | 0.19 | μΩ·m | At 20°C | | **Magnetic Properties** | Ferromagnetic | - | Below 770°C Curie point | | **Density** | 7.85 | g/cm³ | 0.284 lb/in³ | ## **5. MECHANICAL PROPERTIES** ### **As-Hot Rolled Condition** | Property | Value Range | Typical | Unit | |----------|-------------|---------|------| | **Tensile Strength** | 470-580 | 525 | MPa | | **Yield Strength (Rp0.2)** | 310-380 | 345 | MPa | | **Elongation (A50mm)** | 25-32 | 28 | % | | **Reduction of Area** | 50-60 | 55 | % | | **Brinell Hardness** | 140-180 | 160 | HB | | **Impact Energy (Charpy V)** | 70-100 | 85 | J @ 20°C | ### **Cold Drawn Condition** | Property | Value Range | Typical | Unit | |----------|-------------|---------|------| | **Tensile Strength** | 550-650 | 600 | MPa | | **Yield Strength** | 450-550 | 500 | MPa | | **Elongation** | 15-22 | 18 | % | | **Hardness** | 170-210 | 190 | HB | ### **Normalized Condition (900°C, air cooled)** | Property | Value Range | Unit | |----------|-------------|------| | **Tensile Strength** | 480-570 | MPa | | **Yield Strength** | 320-400 | MPa | | **Elongation** | 26-32 | % | | **Hardness** | 145-175 | HB | ### **Heat Treated Properties (Quenched & Tempered)** | Tempering Temperature | Tensile Strength | Yield Strength | Hardness | |----------------------|-----------------|---------------|----------| | **205°C (400°F)** | 900-1050 MPa | 750-900 MPa | 28-32 HRC | | **425°C (800°F)** | 700-850 MPa | 550-700 MPa | 22-26 HRC | | **540°C (1000°F)** | 550-650 MPa | 450-550 MPa | 18-22 HRC | ## **6. HEAT TREATMENT CHARACTERISTICS** ### **Critical Temperatures** | Transformation | Temperature Range | |---------------|------------------| | **Ac1** | 720-740°C | | **Ac3** | 850-870°C | | **Ar1** | 680-700°C | | **Ar3** | 780-800°C | ### **Recommended Heat Treatments** 1. **Annealing** - Temperature: 845-900°C (1550-1650°F) - Cooling: Furnace cool to 600°C, then air cool - Resulting hardness: 140-160 HB 2. **Normalizing** - Temperature: 870-920°C (1600-1680°F) - Cooling: Air cool - Resulting hardness: 150-175 HB 3. **Hardening** - Austenitizing: 830-870°C (1525-1600°F) - Quenching medium: Oil (water for thin sections) - As-quenched hardness: 40-45 HRC 4. **Tempering** - Temperature: 205-650°C (400-1200°F) - Time: 1 hour per inch of thickness minimum ### **Hardenability Data (Jominy Test - Typical)** | Distance from Quenched End (1/16") | Hardness (HRC) | |------------------------------------|----------------| | 1 | 38-42 | | 2 | 35-40 | | 4 | 28-33 | | 8 | 22-26 | | 12 | 19-23 | | 16 | 17-21 | | 20 | 16-19 | ## **7. MANUFACTURING & PROCESSING PROPERTIES** ### **Machinability** - **Machinability Rating**: 65% of B1112 steel (annealed condition) - **Relative Machinability Index**: 0.70 (compared to 1.0 for 1212) - **Tool Life Expectancy**: Good with proper tool selection **Recommended Machining Parameters:** - Cutting speed: 30-45 m/min (HSS tools, annealed) - Feed rate: 0.20-0.35 mm/rev - Depth of cut: Up to 5 mm for roughing - Tool materials: Carbide or coated carbide recommended - Coolant: Soluble oil or sulfurized oils ### **Forming Characteristics** | Process | Suitability | Recommended Conditions | |---------|-------------|------------------------| | **Cold Forming** | Good | Annealed condition | | **Hot Forming** | Excellent | 1100-900°C range | | **Forging** | Excellent | Start 1200°C, finish 850°C | | **Bending** | Good | Minimum bend radius: 1t (t=thickness) | ### **Welding Properties** | Parameter | Rating/Value | Notes | |-----------|--------------|-------| | **Weldability** | Good | Preferable to 1018 | | **Preheat Temperature** | 100-150°C | For thickness >20mm | | **Post-Weld Heat Treatment** | Recommended | 590-650°C for stress relief | | **Suitable Processes** | SMAW, GMAW, GTAW | | | **Electrode Selection** | E7018, ER70S-6 | Low hydrogen preferred | ## **8. PRIMARY APPLICATIONS** ### **Automotive Industry** - Chassis components and brackets - Suspension parts (non-critical) - Steering linkage components - Engine mounts and brackets - Transmission support parts - Brake system components ### **Industrial Machinery** - General purpose shafts - Gears and sprockets (heat treated) - Machine tool components - Agricultural equipment parts - Material handling equipment - Fasteners and brackets ### **Construction & Infrastructure** - Structural connectors - Support brackets - Hardware components - Non-critical fasteners - Scaffolding components ### **Consumer Products** - Appliance components - Furniture hardware - Hand tool components - Bicycle parts - Recreational equipment ## **9. COMPARATIVE ANALYSIS** ### **Comparison with Similar Grades** | Grade | C (%) | Mn (%) | Key Characteristics | Typical Uses | |-------|-------|--------|---------------------|-------------| | **SAE 1018** | 0.15-0.20 | 0.60-0.90 | Lower hardenability | General purpose | | **SAE 1518** | 0.15-0.21 | 1.10-1.40 | Better hardenability | Light-medium duty parts | | **SAE 1524** | 0.19-0.25 | 1.35-1.65 | Higher strength | Medium duty components | | **SAE 8620** | 0.18-0.23 | 0.70-0.90 | Alloy steel | Critical, high-strength parts | ### **Advantages of SAE 1518** 1. Better hardenability than plain carbon steels 2. Good combination of strength and ductility 3. Cost-effective alternative to alloy steels for many applications 4. Good machinability in annealed condition 5. Suitable for various heat treatments ### **Limitations** 1. Not suitable for high-temperature applications (>400°C) 2. Limited corrosion resistance (requires protection) 3. Maximum hardness limited compared to alloy steels 4. Not recommended for severe impact applications ## **10. QUALITY STANDARDS & TESTING** ### **Applicable Standards** - **Chemical Analysis**: ASTM A751, SAE J408 - **Tensile Testing**: ASTM A370, ISO 6892-1 - **Hardness Testing**: ASTM E10 (Brinell), E18 (Rockwell) - **Impact Testing**: ASTM E23 (Charpy) - **Microstructure**: ASTM E112 (Grain size), E45 (Inclusions) ### **Inspection Requirements** - Chemical composition verification - Tensile testing (minimum per heat treatment lot) - Hardness testing - Dimensional verification - Surface quality inspection ### **Certification** - Mill Test Certificate per EN 10204 3.1 - Heat number traceability - Processing history documentation ## **11. ENVIRONMENTAL & SAFETY INFORMATION** - **Material Classification**: Non-hazardous carbon steel - **Recyclability**: 100% recyclable as ferrous scrap - **RoHS/REACH Compliance**: Fully compliant - **Machining Safety**: Standard machine shop precautions - **Welding Safety**: Adequate ventilation required - **Disposal**: Classify as non-hazardous metal waste ## **12. STORAGE & HANDLING** 1. Store in dry, covered conditions 2. Protect from corrosion with oil coating if necessary 3. Stack properly to prevent deformation 4. Use appropriate lifting equipment 5. Maintain proper inventory rotation ## **13. TECHNICAL NOTES** ### **Selection Considerations** 1. **Section Size**: Consider hardenability limitations for thick sections 2. **Heat Treatment**: Specify required condition clearly 3. **Machining Requirements**: Consider annealed condition for complex parts 4. **Welding Needs**: May require pre/post heat treatment for thick sections 5. **Cost vs Performance**: Evaluate against alloy steel alternatives ### **Design Recommendations** 1. Allow for heat treatment distortion 2. Consider stress concentrations in design 3. Specify appropriate surface finishes 4. Consider corrosion protection requirements 5. Account for material variability in critical applications ## **14. TYPICAL PRODUCT FORMS** - Round bars: 3-250 mm diameter - Flat bars: Various thicknesses and widths - Square and hexagonal bars - Wire and rod products - Plates and sheets - Forging stock - Tubing (seamless and welded) ## **15. SUPPLIER SPECIFICATIONS** When ordering SAE 1518, specify: - Desired condition (hot rolled, cold drawn, annealed, etc.) - Dimensional tolerances - Heat treatment requirements (if any) - Testing and certification needs - Packaging requirements - Surface finish specifications --- **Disclaimer**: The information provided is based on standard specifications and typical material behavior. Actual properties may vary depending on manufacturing processes, heat treatment parameters, and specific application conditions. Always consult certified material test reports for critical applications and conduct appropriate validation testing. **References**: - SAE J403: Chemical Composition of SAE Carbon Steels - ASTM A29/A29M: Standard Specification for Steel Bars, Carbon and Alloy - ISO 683-18: Heat-treatable steels, alloy steels and free-cutting steels **Document Version**: 1.0 **Last Updated**: October 2023 -:- For detailed product information, please contact sales. -: SAE 1518 Carbon Steel, Composition Spec Specification Dimensions Size： Diameter 20-1000 mm Length <5545 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. -: SAE 1518 Carbon Steel, Composition Spec Properties -:- For detailed product information, please contact sales. -:

Applications of SAE 1518 Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -: Chemical Identifiers SAE 1518 Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -:

Packing of SAE 1518 Carbon Steel Flange, Composition Spec -:- 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 Flange 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 2016 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