AISI 5115/SAE 5115 Low Alloy 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. -: AISI 5115/SAE 5115 Low Alloy Steel Flange, Cold Drawn Bar Product Information -:- For detailed product information, please contact sales. -: AISI 5115/SAE 5115 Low Alloy Steel Flange, Cold Drawn Bar Synonyms -:- For detailed product information, please contact sales. -:

AISI 5115/SAE 5115 Low Alloy Steel, Cold Drawn Bar Product Information -:- For detailed product information, please contact sales. -: # **AISI 5115/SAE 5115 Low Alloy Steel (Cold Drawn Bar)** ## **1. Product Overview** **AISI/SAE 5115** is a low-carbon, chromium-case hardening steel specifically designed for **carburizing or carbonitriding** heat treatments. When supplied as **cold drawn bars**, this material offers improved dimensional accuracy, superior surface finish, and enhanced mechanical properties in the as-drawn condition, making it ideal for high-precision components that undergo subsequent case hardening. The steel contains approximately **0.7-1.0% chromium**, which provides good hardenability of the case after carburizing while maintaining a relatively tough and ductile core. The cold drawing process induces strain hardening, resulting in higher tensile strength and yield strength compared to hot-rolled products, with typical surface finishes of 63-125 µin Ra (1.6-3.2 µm Ra). --- ## **2. Chemical Composition (SAE J404/J412)** | Element | Composition Range (%) | Function & Effect | |---------|----------------------|-------------------| | **Carbon (C)** | 0.13 - 0.18 | Provides core strength; low carbon ensures good core toughness after case hardening | | **Manganese (Mn)** | 0.70 - 0.90 | Improves hardenability and strength; aids in deoxidation | | **Phosphorus (P)** | ≤ 0.035 | Residual element; minimized for improved toughness | | **Sulfur (S)** | ≤ 0.040 | Residual element; typically kept low for better transverse properties | | **Silicon (Si)** | 0.15 - 0.35 | Deoxidizer; strengthens ferrite matrix | | **Chromium (Cr)** | 0.70 - 0.90 | **Key alloying element**; enhances case hardenability and wear resistance | | **Nickel (Ni)** | - | Not intentionally added | | **Molybdenum (Mo)** | - | Not intentionally added | | **Iron (Fe)** | Balance | Base metal | **Material Designation:** - **SAE/AISI:** 5115 - **UNS:** G51150 - **Cold Drawn Condition:** CD (Commercial Drawn), SHTCD (Stress Relieved & Cold Drawn), or as specified --- ## **3. Physical & Mechanical Properties** ### **Cold Drawn Condition (As-Drawn):** - **Surface Finish:** 63-125 µin Ra (1.6-3.2 µm Ra) - **Dimensional Tolerance:** ASTM A108 Grade 1018 cold drawn tolerances - **Straightness:** Typically 0.060" per foot maximum - **Hardness:** 187-229 HB (Brinell) / 88-97 HRB - **Tensile Strength:** 620-795 MPa (90-115 ksi) - **Yield Strength:** 515-690 MPa (75-100 ksi) - *Significantly higher than hot-rolled* - **Elongation (in 2"):** 12-18% - **Reduction of Area:** 35-50% - **Machinability:** 60-65% (relative to 1212 steel = 100%) ### **After Case Hardening (Typical Results):** *Carburizing Cycle:* - **Temperature:** 900-925°C (1650-1700°F) - **Case Depth:** 0.5-2.0 mm (0.020-0.080") as specified - **Quenching:** Oil quench from 815-845°C (1500-1550°F) - **Tempering:** 150-200°C (300-400°F) **Resultant Properties:** - **Surface Hardness:** 58-63 HRC - **Effective Case Depth (550 HV):** 0.5-1.5 mm - **Core Hardness:** 25-40 HRC (depends on section size) - **Core Tensile Strength:** 860-1100 MPa - **Core Toughness:** Good impact resistance ### **Physical Constants:** - **Density:** 7.85 g/cm³ (0.284 lb/in³) - **Melting Point:** 1480-1530°C (2695-2785°F) - **Modulus of Elasticity:** 205 GPa (29,700 ksi) - **Poisson's Ratio:** 0.29 - **Thermal Conductivity:** 46.6 W/m·K at 100°C - **Coefficient of Thermal Expansion:** 11.5 µm/m·°C (20-100°C) --- ## **4. Product Applications** **Cold drawn 5115 bars are extensively used for precision components requiring:** ### **Automotive Industry:** - **Gears:** Transmission gears, differential gears, timing gears - **Shafts:** Camshafts, small crankshafts, transmission shafts - **Bearings:** Needle bearing races, roller bearing races - **Fasteners:** High-strength bolts, studs, special fasteners - **Other:** Valve components, steering parts, splined shafts ### **Industrial Machinery:** - **Gear components** for power transmission equipment - **Bushings and bearings** for rotating equipment - **Pins and shafts** requiring wear resistance - **Hydraulic components** with wear surfaces - **Machine tool parts** requiring precision and wear resistance ### **Agricultural Equipment:** - **Transmission gears** for tractors and harvesters - **Implement drive components** - **PTO shaft components** ### **Consumer Products:** - **Power tool components** (gears, shafts) - **Appliance parts** requiring wear resistance - **Bicycle and motorcycle components** --- ## **5. International Standards & Equivalents** ### **Primary Standards:** | Standard | Designation | Specification | |----------|-------------|---------------| | **SAE/AISI** | **5115** | SAE J404, J412 | | **ASTM** | **5115** | A304, A322 (Bars) | | **UNS** | **G51150** | Unified Numbering System | | **ASTM (Cold Drawn)** | **A108** | Standard for Cold Finished Bars | ### **International Equivalent Grades:** | Country/Region | Standard | Equivalent Grade | Notes | |----------------|----------|-----------------|-------| | **Germany** | DIN 17210 | **16Cr3** | Close equivalent | | **Europe (EN)** | EN 10084 | **16Cr4** | Case hardening steel | | **Japan** | JIS G4105 | **SCr415** | Similar properties | | **China** | GB/T 5216 | **15Cr** | Chinese equivalent | | **International** | ISO 683-11 | **16Cr4** | Type 1.7016 | ### **Cold Drawn Bar Standards:** - **ASTM A108:** Standard for Steel Bars, Carbon, Cold-Finished - **SAE J1397:** Steel Bars, Alloy, Hot-Wrought and Cold-Finished - **DIN EN 10278:** Bright steel products - Dimensions and tolerances - **ISO 286-2:** ISO system of limits and fits --- ## **6. Manufacturing & Processing Guidelines** ### **Cold Drawing Process:** 1. **Starting Material:** Hot-rolled bars normalized or annealed 2. **Pre-treatment:** Pickling to remove scale 3. **Drawing:** Single or multiple passes through dies 4. **Optional Stress Relieving:** 550-650°C to relieve drawing stresses 5. **Final Sizing:** Straightening and cutting to length ### **Machinability (Cold Drawn Condition):** - **Cutting Speed:** 70-85 SFPM for turning operations - **Feed Rate:** Moderate - **Tool Material:** HSS or carbide recommended - **Coolant:** Required for optimum results - **Chip Formation:** Continuous chips; chip breakers recommended ### **Heat Treatment for Case Hardening:** 1. **Carburizing/Carbonitriding:** 900-925°C in carburizing atmosphere 2. **Diffusion (Optional):** Reduce temperature to equalize carbon gradient 3. **Quenching:** Oil quench from 815-845°C 4. **Sub-zero Treatment (Optional):** For maximum dimensional stability 5. **Tempering:** 150-200°C for 1-2 hours 6. **Final Grinding/Honing:** As required for precision applications ### **Welding Considerations:** - **Weldability:** Fair (pre-heat 150-200°C recommended) - **Processes:** GTAW, GMAW with low-hydrogen electrodes - **Post-weld:** Full anneal or re-heat treat if carburized area affected - **Limitations:** Avoid welding after case hardening --- ## **7. Quality & Inspection** ### **Standard Testing:** - **Chemical Analysis:** Per ASTM A751 - **Hardness Testing:** Brinell or Rockwell per ASTM E10/E18 - **Tensile Testing:** Per ASTM A370 - **Surface Inspection:** Visual and dimensional checks - **Microcleanliness:** Per ASTM E45 (if specified) ### **Cold Drawn Bar Specifics:** - **Dimensional Tolerance:** Typically ASTM A108 Table 7 - **Straightness:** 0.060"/ft maximum for commercial quality - **Surface Defects:** Free from seams, laps, and excessive drawing marks - **Decarburization:** Maximum 0.003" total decarb per side ### **Certifications:** - **Mill Test Certificate:** 2.2 or 3.1 per EN 10204 - **Material Traceability:** Full heat/lot traceability - **Compliance Certificates:** As required by specification --- ## **8. Advantages of Cold Drawn 5115 vs. Hot-Rolled** | Property | Cold Drawn 5115 | Hot-Rolled 5115 | |----------|----------------|-----------------| | **Surface Finish** | 63-125 µin Ra | 250-500 µin Ra | | **Dimensional Accuracy** | ±0.002-0.005"/inch | ±0.010-0.020"/inch | | **Yield Strength** | 75-100 ksi | 55-70 ksi | | **Straightness** | 0.060"/ft max | 0.125"/ft typical | | **Machining Time** | Reduced | Standard | | **Material Cost** | 15-30% higher | Baseline | | **Scrap Rate** | Lower | Higher | --- ## **9. Design Considerations** ### **Optimal Applications:** - Components requiring **minimal machining** before heat treatment - **High-volume production** where material consistency is critical - Applications needing **improved fatigue strength** from better surface finish - **Precision components** with tight dimensional tolerances ### **Limitations:** - **Size Limitations:** Typically available up to 4" diameter - **Residual Stresses:** May require stress relieving for critical applications - **Anisotropic Properties:** Mechanical properties vary with direction - **Cost Premium:** Higher than hot-rolled material ### **Section Size Guidelines:** - **Optimum Carburizing:** 10-50 mm diameter sections - **Maximum Effective Case:** ~1/6 of section thickness - **Minimum Wall Thickness:** 2× case depth + core requirement --- ## **10. Technical Comparison with Similar Grades** | Grade | C Range | Cr Range | Typical Use | Relative Cost | |-------|---------|----------|-------------|---------------| | **5115** | 0.13-0.18 | 0.70-0.90 | General case hardening | 1.0 | | **5120** | 0.17-0.22 | 0.70-0.90 | Higher core strength | 1.0 | | **4118** | 0.18-0.23 | 0.40-0.60 | Moderate hardenability | 0.9 | | **8620** | 0.18-0.23 | 0.40-0.60 | Nickel-chromium-molybdenum | 1.2 | --- ## **11. Storage & Handling** ### **Storage Conditions:** - **Indoor Storage:** Preferred to prevent rust - **Protection:** Oiled or coated surface if long-term storage - **Stacking:** Flat and supported to prevent bending - **Identification:** Maintain heat/lot identification ### **Rust Prevention:** - **Temporary:** Oil film or VCI paper wrapping - **Permanent:** Phosphate coating or plating after machining - **Cleaning:** Degreasing before heat treatment --- **Revision:** 1.2 **Date:** October 2023 **Disclaimer:** This technical information is for reference only. Actual properties may vary based on manufacturer, processing, and specific conditions. Always consult with material suppliers and conduct appropriate testing for critical applications. Cold drawing processes and resulting properties may vary between producers. -:- For detailed product information, please contact sales. -: AISI 5115/SAE 5115 Low Alloy Steel, Cold Drawn Bar Specification Dimensions Size： Diameter 20-1000 mm Length <4106 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. -: AISI 5115/SAE 5115 Low Alloy Steel, Cold Drawn Bar Properties -:- For detailed product information, please contact sales. -:

Applications of AISI 5115/SAE 5115 Low Alloy Steel Flange, Cold Drawn Bar -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI 5115/SAE 5115 Low Alloy Steel Flange, Cold Drawn Bar -:- For detailed product information, please contact sales. -:

Packing of AISI 5115/SAE 5115 Low Alloy Steel Flange, Cold Drawn Bar -:- 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 577 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