CCS Ship Steel Plate EH40
Products Description The Specific Operating Procedures for Non-Destructive Testing during the Acceptance of CCS Ship Steel Plate EH40 When it comes to the acceptance of CCS Ship Steel Plate EH40, non-destructive testing (NDT) plays a crucial role in ensuring the quality and integrity of the...
Description
Products Description
The Specific Operating Procedures for Non-Destructive Testing during the Acceptance of CCS Ship Steel Plate EH40
When it comes to the acceptance of CCS Ship Steel Plate EH40, non-destructive testing (NDT) plays a crucial role in ensuring the quality and integrity of the steel plates. The specific operating procedures for NDT are highly detailed and precise to provide accurate and reliable results.
One of the commonly used NDT methods is Ultrasonic Testing (UT). The UT process begins with the selection of appropriate ultrasonic testing equipment. This typically includes a pulse-echo ultrasonic flaw detector with a frequency range suitable for the thickness and material properties of the CCS Ship Steel Plate EH40.
Before the actual testing, the surface of the steel plate to be inspected is thoroughly cleaned and prepared to remove any dirt, rust, or coatings that might interfere with the test. The transducer, which emits and receives ultrasonic waves, is then applied to the surface of the plate using a coupling medium, usually a gel or liquid, to ensure efficient transmission of the waves.
The test is conducted by moving the transducer along a predefined grid pattern on the plate surface. The ultrasonic waves travel through the material, and any reflections or echoes are detected and analyzed by the flaw detector. Data such as the time of flight and amplitude of the echoes are recorded.
For CCS Ship Steel Plate EH40, the acceptable defect size and type are specified in the relevant standards. If an echo indicates the presence of a defect, its location, size, and shape are estimated based on the analysis of the ultrasonic data. For example, a defect with a depth of more than a certain percentage of the plate thickness, say 5%, or an area exceeding a specified limit might be considered unacceptable.
|
Grade |
YieldStrength MPA |
TensileStrength MPA |
Elongation% |
TestTemperature°C |
V Ballistic Work |
||
|
Thickness mm |
|||||||
|
≤50 |
>50~70 |
>70~100 |
|||||
|
L |
T |
L |
T |
L |
T |
||
|
A |
≥235 |
400-520 |
≥22 |
20 |
34 |
||
|
B |
≥235 |
400-520 |
≥22 |
0 |
27 |
20 |
34 |
|
D |
≥235 |
400-520 |
≥22 |
-20 |
27 |
20 |
34 |
|
E |
≥235 |
400-520 |
≥22 |
-40 |
27 |
20 |
34 |
|
AH32 |
≥315 |
440-570 |
≥22 |
0 |
31 |
22 |
38 |
|
DH32 |
≥315 |
440-570 |
≥22 |
-20 |
31 |
22 |
38 |
|
EH32 |
≥315 |
440-570 |
≥22 |
-40 |
31 |
22 |
38 |
|
AH36 |
≥355 |
490-630 |
≥21 |
0 |
34 |
24 |
41 |
|
DH36 |
≥355 |
490-630 |
≥21 |
-20 |
34 |
24 |
41 |
|
EH36 |
≥355 |
490-630 |
≥21 |
-40 |
34 |
24 |
41 |
|
AH40 |
≥390 |
510-660 |
≥20 |
0 |
41 |
27 |
|
|
DH40 |
≥390 |
510-660 |
≥20 |
-20 |
41 |
27 |
|
|
EH40 |
≥390 |
510-660 |
≥20 |
-40 |
41 |
27 |
Another NDT method frequently employed is Magnetic Particle Testing (MT). In this procedure, the steel plate is first magnetized using a direct current or alternating current magnetic field. A magnetic powder or liquid is then applied to the surface.
If there are any surface or near-surface defects, the magnetic field lines will be distorted, causing the magnetic particles to accumulate at the defect locations, forming visible indications. The MT is particularly effective in detecting surface cracks and discontinuities.
During the MT process, the strength and direction of the magnetic field, as well as the type and concentration of the magnetic particles, are carefully controlled to ensure sensitive and accurate detection. The size and shape of the indications are evaluated against the acceptance criteria.
Radiographic Testing (RT) is also sometimes used for thicker CCS Ship Steel Plate EH40. In RT, X-rays or gamma rays are passed through the steel plate, and the resulting image on a film or digital detector is analyzed.
Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our CCS Ship Steel Plate EH40, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.
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