| Standardization field | Metallic materials |
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| Technical committee | BAS/TC 4- Steel, steel products, non-ferrous metals and alloys |
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| Term (EN) | carbon activity |
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| Definition (EN) | Ratio of the vapour pressure of carbon in a given state (for example in austenite of specific carbon concentration) to the vapour pressure of pure carbon (graphite), as a reference state, at the same temperature.
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| Term (FR) | |
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| Definition (FR) | |
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| Term (DE) | |
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| Definition (DE) | |
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| Term (BS) | aktivitet ugljika |
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| Definition (BS) | Odnos pritiska pare ugljika za dato stanje (naprimjer u austenitu odreðene koncentracije ugljika) prema pritisku pare èistog ugljika (grafit) kao referentno stanje, na istoj temperaturi.
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| Term (HR) | |
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| Definition (HR) | |
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| Term (SR) | |
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| Definition (SR) | |
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| Date | 2016-04-04 |
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| Standards | BAS EN 10052:2005 |
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