When to conduct the low-temperature shock test
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Hello everyone: The requirements for impact testing of steel plate materials are specified in the material standards. Logically, I just need to state the standards that the materials should meet. My question is: under what circumstances is it necessary to specify them separately? What is the basis for the impact test values?
When impact is required, the designers must indicate it on the drawings
This post was last edited by 15837357920 on 2016-10-6 at 11:45. When the design temperature does not match the standard required temperature for the material, it is necessary to specify the impact temperature. For example, when Q345R is used at -20 degrees (the standard is 0 degrees). 09MnNiDR is used at -55 degrees (the standard is -70 degrees). Also, it is necessary to explain when the sampling position differs from the standard (the standard being at 1/4 of the plate thickness), as well as in other cases where there are deviations from the standard. If not specified, the standard requirements apply by default; if problems arise due to the device exceeding those standard requirements, the design is responsible for them. If the equipment is manufactured to standards even when it falls short of those requirements, it will result in excessive quality.
:lol:lol These are the design and manufacturing standards for the product, which should be considered together with the material standards. . . I just know when to bring it up. .
Page 47 of 150 shows that Q345R with a thickness of 6 to 200 mm can be used for impact tests at 0°C, and can also be used at -20°C. So if Q345R is used at -20°C, is it still necessary to conduct impact tests at -20°C? What are the test values?
If the default factory condition of the material does not meet the design requirements regarding impact resistance, additional requirements for impact resistance must be specified
If it is to be used at -20°C, this test is required; the impact value requirements are generally the same as those at 0°C. If it meets the standards at -20°C, then this test is not necessary at 0°C. If there are design specifications, follow them. However, for use at -20°C, this must be specified in the design documents, and it should also be indicated in the contract for procurement purposes.
Generally, when it matches a standard pair, it needs to be proposed
Such a detailed answer – it really seems like an excellent one! The layer owner is so thoughtful~~~