YB/T 4290-2012 PDF English
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Basic data
| Standard ID | YB/T 4290-2012 (YB/T4290-2012) |
| Description (Translated English) | Test methods for estimating the largest grain observed in a metallographic section (ALA grain size) |
| Sector / Industry | Ferrous Metallurgy Industry Standard (Recommended) |
| Classification of Chinese Standard | H24 |
| Classification of International Standard | 77.040.99 |
| Word Count Estimation | 12,197 |
| Quoted Standard | GB/T 6394-2002; GB/T 13298; GB/T 24177; GB/T 30067 |
| Adopted Standard | ASTM E930-1999(2007), IDT |
| Regulation (derived from) | Ministry of Industry and Information Technology Bulletin No. 55 of 2012; industry standard filing Notice 2013 No. 2 (No. 158 overall) |
| Issuing agency(ies) | Ministry of Industry and Information Technology |
| Summary | This standard specifies the test method for determining the maximum grain size level (ALA grain size) observed on the metallographic surface. This standard applies only to microstructures containing unusually coarse grains, which are too sparsely distributed to measure grain size using the GB/T 6394-2002 standard. |