Steel is a highly versatile material used for centuries in various industries and applications. One type of steel has gained popularity over the years is SAE AISI 11L17 steel. This medium-carbon steel has unique properties that make it suitable for various uses. In this blog post, we will explore everything you need to know about SAE AISI 11L17 steel, from its composition and mechanical properties to its heat treatment and welding.
SAE AISI 11L17 Steel Composition
SAE AISI 11L17 steel is medium-carbon steel that contains between 0.15% and 0.20% carbon, giving it strength and durability. It also contains small traces of other elements, such as manganese, phosphorus, sulfur, and lead. Adding lead improves the steel’s machinability, making it easier to cut and shape.
| Element | Content (%) |
|---|---|
| Iron, Fe | 98.33 – 98.78 |
| Manganese, Mn | 1.0 – 1.30 |
| Carbon, C | 0.14 – 0.20 |
| Sulfur, S | 0.080 – 0.13 |
| Phosphorous, P | 0.040 |
SAE AISI 11L17 Steel Mechanical Properties
SAE AISI 11L17 steel has high strength and hardness, making it a popular choice for applications that require high tensile strength and wear resistance. It has a yield strength of 415 MPa and a tensile strength of 485 MPa. Additionally, it has a high elongation and reduced area, which means it can be formed and shaped easily.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 475 MPa | 68900 psi |
| Yield strength | 400 MPa | 58000 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80.0 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 15% | 15% |
| Reduction of area | 40% | 40% |
| Hardness, Brinell | 137 | 137 |
| Hardness, Knoop (converted from Brinell hardness) | 156 | 156 |
| Hardness, Rockwell B (converted from Brinell hardness) | 75 | 75 |
| Hardness, Vickers (converted from Brinell hardness) | 143 | 143 |
SAE AISI 11L17 Steel Physical Properties
SAE AISI 11L17 steel has a density of 7.8 g/cm³, making it a fairly dense material. It also has a melting point of 1420-1460°C and a thermal conductivity of 44.5 W/m-K. These properties make it suitable for use in applications where high temperatures and thermal conductivity are required.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
SAE AISI 11L17 Steel Equivalents
- AMS 5022
- ASTM A108 (1117)
- ASTM A29 (1117)
- ASTM A510 (1117)
- ASTM A512 (1117)
- ASTM A576 (1117)
- SAE J1397 (1117)
- SAE J403 (1117)
- SAE J412 (1117)
- AMS 5022G
- ASTM A107
- QQ-S-637 (1117)
- MIL-S-18411
- SAE J414
SAE AISI 11L17 Steel Uses
SAE AISI 11L17 steel is commonly used to manufacture shafts, gears, pins, and screws. It’s high strength and wear resistance make it popular for parts subjected to increased stress and friction. Additionally, its lead content makes it ideal for applications that require superior machinability, such as complex parts that need to be shaped or threaded.
SAE AISI 11L17 Steel Corrosion Resistance
SAE AISI 11L17 steel has good corrosion resistance, making it suitable for corrosive applications. Its corrosion resistance is due to its high carbon content, which forms a barrier that protects it from oxidation. Additionally, its lead content makes it resistant to certain types of corrosion that can occur in acidic environments.
SAE AISI 11L17 Steel Heat Treatment
SAE AISI 11L17 steel can be heat treated to improve its properties. Heat treatment involves heating the steel to a specific temperature and cooling it rapidly in quenching. This can improve the steel’s hardness, strength, and wear resistance. However, care must be taken during the heat treatment, as excessive heating or cooling can cause the steel to become brittle.
SAE AISI 11L17 Steel Machining
SAE AISI 11L17 steel is known for its superior machinability, which makes it a popular choice for parts that require intricate shaping or threading. Its lead content improves its cutting performance, allowing it to be machined at high speeds and with minimal tool wear. Its medium hardness makes it easy to machine without requiring specialized cutting tools.
SAE AISI 11L17 Steel Welding
SAE AISI 11L17 steel can be welded using various welding techniques, including arc, resistance, and oxy-fuel welding. However, care must be taken during welding, as excessive heating can cause the steel to become brittle. Preheating the steel before welding and controlling the heat input can help prevent this.
Conclusion
In summary, SAE AISI 11L17 steel is a medium-carbon steel with unique properties that make it suitable for various applications. Its high strength, wear resistance, and machinability make it a popular choice for parts that require precision and durability. Its superior corrosion resistance and thermal conductivity make it suitable for harsh environments. Understanding this steel’s composition, mechanical properties, physical properties, and best practices for heat treatment, machining, and welding can help ensure its optimal performance and longevity in various applications.
