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SA 453 Grade 660 Type A Stud Bolt
QS Fastener: SA 453 Grade 660 Type A Stud Bolt
Name: SA 453 Grade 660 Type A Stud Bolt
Material: SA 453 Grade 660 Type A, UNS S66286
Size: M42
Hardness: 24-37 HRC
Length: 440 mm
Complete: Fully Thread Stud Bolt with Two Heavy Hex Nuts
Delivery Condition: With Solution and Hardening Treatment
Material: SA 453 Grade 660 Type A, UNS S66286
Size: M42
Hardness: 24-37 HRC
Length: 440 mm
Complete: Fully Thread Stud Bolt with Two Heavy Hex Nuts
Delivery Condition: With Solution and Hardening Treatment
Quantity
Hardness Testing of Raw Materials for SA 453 Grade 660 Type A Stud Bolts
The Rockwell hardness testing standard is HRC 30-40 or Vickers hardness HV 320-360.
Hardness testing is one of the key indicators for evaluating the mechanical properties of SA 453 Grade 660 Type A Stud Bolt materials. Rockwell hardness testing and Vickers hardness testing are commonly used methods. Below, we introduce these two testing methods and the instruments used.
The Rockwell hardness testing standard is HRC 30-40 or Vickers hardness HV 320-360.
Hardness testing is one of the key indicators for evaluating the mechanical properties of SA 453 Grade 660 Type A Stud Bolt materials. Rockwell hardness testing and Vickers hardness testing are commonly used methods. Below, we introduce these two testing methods and the instruments used.
1. SA 453 Grade 660 Type A Stud Bolt material Rockwell Hardness Testing (HRC)
Method:
Testing Principle: Rockwell hardness testing involves applying a specific load to a hardness indenter (a steel ball or diamond cone, typically a diamond cone for HRC testing) pressed into the material surface. During the test, a preload is first applied, then increased to the main load, and after stabilization, the main load is removed, leaving only the preload. The Rockwell hardness value is calculated by measuring the depth of the indentation on the material surface.
Method:
Testing Principle: Rockwell hardness testing involves applying a specific load to a hardness indenter (a steel ball or diamond cone, typically a diamond cone for HRC testing) pressed into the material surface. During the test, a preload is first applied, then increased to the main load, and after stabilization, the main load is removed, leaving only the preload. The Rockwell hardness value is calculated by measuring the depth of the indentation on the material surface.
Instruments Used:
Rockwell Hardness Tester: This instrument includes an electromechanical control system and corresponding pressure sensors. Common Rockwell hardness testers include:
Manual or automatic Rockwell hardness testers (suitable for laboratory and field testing, respectively).
Rockwell Hardness Tester: This instrument includes an electromechanical control system and corresponding pressure sensors. Common Rockwell hardness testers include:
Manual or automatic Rockwell hardness testers (suitable for laboratory and field testing, respectively).
Digital Rockwell hardness testers (capable of directly displaying the hardness value).
Testing Steps:
1. Calibrate the hardness tester to ensure accuracy.
1. Calibrate the hardness tester to ensure accuracy.
2. Select the appropriate indenter and load based on the sample’s thickness and shape.
3. Fix the raw material sample of SA 453 Grade 660 Type A Stud Bolt on the testing platform, ensuring stability.
4. Apply the preload and maintain it for a period of time.
5. Increase to the main load, maintain for a specific duration, then remove it (retaining only the preload).
6. Read and record (calculate) the hardness value.
2. Vickers Hardness Testing (HV)
Method:
Testing Principle: Vickers hardness testing uses a square-based diamond pyramid indenter to apply a specific load. The Vickers hardness value is calculated by measuring the diagonal length of the indentation formed on the material surface. Vickers hardness testing is suitable for measuring the hardness of various materials, especially thin-walled materials and small samples.
Method:
Testing Principle: Vickers hardness testing uses a square-based diamond pyramid indenter to apply a specific load. The Vickers hardness value is calculated by measuring the diagonal length of the indentation formed on the material surface. Vickers hardness testing is suitable for measuring the hardness of various materials, especially thin-walled materials and small samples.
Instruments Used:
Vickers Hardness Tester: Common Vickers hardness testers include:
Optical Vickers hardness testers (used for visual observation and measurement of indentations).
Vickers Hardness Tester: Common Vickers hardness testers include:
Optical Vickers hardness testers (used for visual observation and measurement of indentations).
Automatic Vickers hardness testers (equipped with software for multi-point measurement and output of hardness values).
Testing Steps:
1. Calibrate the hardness tester to ensure accurate results.
1. Calibrate the hardness tester to ensure accurate results.
2. Select the appropriate load and check the cleanliness of the indenter.
3. Place the SA 453 Grade 660 Type A Stud Bolt material sample on the testing platform, ensuring the surface is flat.
4. Apply the specific load, which typically ranges from tens of grams to several kilograms depending on material properties, and maintain it for a specific duration (usually 10-15 seconds).
5. Remove the load and measure the diagonal length of the indentation using a microscope.
6. Calculate the hardness value using the formula and record the result.
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