Material Group | P - Steel |
Sub-Group | Low Carbon Steel |
Tensile Strength | 750 [N/mm^2] |
Machinability | 65% - 80% |
A515.65 steel, a pressure vessel quality carbon steel plate, offers a balance of strength, weldability, and machinability. However, like any material, it presents specific challenges during machining that require careful consideration.
Understanding the Machinability of A515.65 Steel:
Overcoming Machinability Challenges:
Additional Tips for Machining A515.65 Steel:
By understanding the unique characteristics of A515.65 steel and implementing these strategies, machinists can effectively manage its machining challenges and achieve desired results in terms of productivity, tool life, and surface finish.
For detailed carbide grade and cutting speed recommendations, refer to resources like the material supplier's datasheet or consult with a machining expert familiar with pressure vessel steels.
Standard | Name |
---|---|
SAE | A515 65 |
WNR | 1.0345 |
DIN | H I |
BS | 1501 161 |
SS | 1330 |
ANFOR | A37CP |
UNF | F.1110 |
Element | Percentage (%) |
Carbon (C) | 0.28 - 0.33 |
Manganese (Mn) | 0.98 max |
Phosphorus (P) | 0.035 max |
Sulfur (S) | 0.035 max |
Silicon (Si) | 0.13 - 0.45 |
The composition may slightly vary depending on the thickness of the steel plate and specific supplier.
Here are some resources where you might be able to find the exact chemical composition for your specific A515.65 steel:
Application | Vc (m/min) | Vc (SFM) |
---|---|---|
Turning | 285-350 | 930-1150 |
Milling | 175-220 | 570-720 |
Parting | 135-170 | 440-560 |
Grooving | 160-195 | 520-640 |
Drilling | 115-140 | 380-460 |
While machining guidelines for A515.65 steel provide a starting point, achieving optimal cutting speeds in real-world scenarios requires understanding the factors that influence machining performance. The estimated speeds are based on ideal conditions, which may not always be achievable in practice.
Factors Affecting Cutting Speed in A515.65 Steel:
Carbide Grade: Selecting the appropriate carbide grade is crucial. While general recommendations suggest carbide tools with TiN or TiCN coatings, the specific grade should be tailored to the specific cutting conditions, desired surface finish, and tool life. Consult with tooling experts or refer to the material supplier's datasheet for specific recommendations.
Tool and Workpiece Clamping: Secure and rigid clamping of both the cutting tool and the workpiece is fundamental. Vibrations and movement can negatively impact accuracy, surface finish, and tool life. Ensure proper clamping techniques and utilize high-quality tooling systems to minimize these risks, especially when dealing with the moderate hardness of A515.65.
Raw Material Quality: Variations in raw material quality, including chemical composition and heat treatment, can affect machinability. Source high-quality A515.65 steel from reputable suppliers and verify its properties to ensure consistent and predictable machining performance.
Tool Overhang: A shorter tool overhang minimizes deflection and vibration, leading to improved cutting stability and surface finish. Strive for the shortest possible overhang without compromising tool reach and accessibility, especially when machining thicker A515.65 plates.
Material Hardness: The hardness of the A515.65 steel workpiece directly impacts cutting forces and tool wear. Verify that the material's hardness falls within the expected range for the chosen carbide grade and cutting parameters. If needed, consider preheating or adjusting cutting parameters to accommodate variations in hardness.
Additional Factors:
By meticulously evaluating these factors and adjusting cutting speeds accordingly, you can fine-tune your machining process to achieve superior results when working with A515.65 steel. Remember, the recommended cutting speeds are a guideline, and real-world optimization requires a holistic approach that considers the entire machining ecosystem.
Disclaimer: The information provided here is intended as a general guideline. It is crucial to consult with tooling experts, refer to manufacturer recommendations, and conduct thorough testing to determine the optimal cutting parameters for your specific application and the specific properties of your A515.65 steel.
Honing Siz | 0.05-0.08 mm / 0.002-0.003" |
Rake Angl | 11° -13° |
Land Angl | Positive |
Land Widt | 0.20-0.30 mm / 0.008-0.012" |