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English Translations » 【静设备】 » What are the major changes in the new version of NB/T47008~4

What are the major changes in the new version of NB/T47008~47010-2017 compared to the 2010 version?

2017-08-02View Original

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Let’s take a moment to summarize: what are the major changes in the new version of NB/T47008~47010-2017 compared to the 2010 version?
Reply #22017-08-02
Isn’t it written in the standards: sleepy:
Reply #32017-08-02
The standards only state what has been added; they don’t mention the detailed changes. For example, the requirements for the S\P content have become stricter, and the sampling requirements for testing mechanical properties at grades II and III have also changed, among other things.
Reply #42017-08-02
In addition, the new version of NB/T47008-2017 also introduces changes to the requirements regarding the hardness test values of forgings.
Reply #52017-08-03
In addition to what was mentioned above, there is also: 1. Change 1Cr5Mo to 12Cr5Mo. 2. Some new forging grades have been added. 3. Low-magnification inspection, metallographic inspection, hydrogen-induced cracking resistance testing, etc., have been added. 4. The mechanical properties have been improved, allowing for high-temperature tensile testing.
Reply #62019-04-04
It was found that there is another case where the yield strength value of some materials increases

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Translated at 2026-07-21 03:05:43

Original: https://bbs.hcbbs.com/thread-1811131-1-1.html

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