JJG 831-1993Verification regultion of green sand mould surface hardness tester for castings (English PDF)
铸造用湿型表面硬度计(试行)
JJG 831 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| JJG 831-2021 | Hardness Testers for Casting Moulds of Sand | Valid |
| JJG 831-1993 | Verification regultion of green sand mould surface hardness tester for castings | Obsolete |
JJG 831-1993 is obsolete. It has been replaced by JJG 831-2021. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
NBM
Level / Type
National · Mandatory
Issue date
July 16, 1993
Implementation date
February 1, 1994
Scope
JJG 831-1993 is the English-translated version of 铸造用湿型表面硬度计(试行).
JJG 831-1993 is the Chinese metrological standard "Verification regultion of green sand mould surface hardness tester for castings". It was issued on July 16, 1993 by NBM, and took effect on February 1, 1994. It is obsolete: it has been replaced by JJG 831-2021.
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Document preview — JJG 831-1993
National Standard of the People's Republic of China
Issued by: NBM
Contents
- Document data
1 Document data
Sector: Metrological Verification (metrological standard).
Issuing body: NBM.
Date of issue: 1993-07-16.
Date of implementation: 1994-02-01.
Status: obsolete, replaced by JJG 831-2021.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
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JJG 831-1993
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