GB/T 4188-2017Molybdenum bars and molybdenum rods (English PDF)
钼条和钼杆
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 31, 2017
Implementation date
February 1, 2018
Scope
GB/T 4188-2017 is the English-translated version of 钼条和钼杆.
GB/T 4188-2017 is the Chinese standard "Molybdenum bars and molybdenum rods". Its scope clause reads: This standard specifies the molybdenum bar and molybdenum rod requirements, test methods, inspection rules, signs, packaging, transportation, storage.
This standard applies to the molybdenum strip prepared by powder metallurgy method and the subsequent use of mechanical processing methods (such as forging, rolling, drawing straightening and Polishing and other processing methods) prepared molybdenum rod. Its clauses include requirements.
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Document preview — GB/T 4188-2017
National Standard of the People's Republic of China
- ICS
- 31.030
- Classification
- L 90
- Replacing
- GB/T 4188-1984
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 requirements
- 3.1 product classification
- 3.2 chemical composition
1 Scope
This standard specifies the molybdenum bar and molybdenum rod requirements, test methods, inspection rules, signs, packaging, transportation, storage.
This standard applies to the molybdenum strip prepared by powder metallurgy method and the subsequent use of mechanical processing methods (such as forging, rolling, drawing straightening and
Polishing and other processing methods) prepared molybdenum rod.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4196 tungsten, molybdenum strip density determination method
GB/T 4197 tungsten, molybdenum and their alloys sintered billet, bar grain size test method
GB/T 4325 Methods for chemical analysis of molybdenum
3 requirements
3.1 product classification
Product classification methods are as follows.
a) According to the chemical composition, molybdenum bars and molybdenum bar grades are divided into MoCo, MoLa, MoK, MoY, Mo1, Mo2;
b) According to the different cross-sectional shape, molybdenum strip is divided into molybdenum bar and molybdenum bar. Molybdenum square bar said the method shown in Example 1; molybdenum bar said side
See Example 2
Example 1. A MoK molybdenum square of 14 mm in length, 16 mm in width and 400 mm in length is represented by MoK-14x16x400.
Example 2. A Mo1 molybdenum rod with a diameter of 15 mm and a length of 500 mm is represented by Mo1-Phi15 × 400.
3.2 chemical composition
Different grades of molybdenum molybdenum rod, its chemical composition (mass fraction) should be consistent with the provisions of Table 1.
Table 1 %
Grade (Molybdenum addition
Element) content
Add elemental content
Co, Mg La2O3 Si, Al, K Y2O3
Other impurities
The sum of the elements
Each impurity
Elemental content
MoCo >=99.95 0.01 ~ 0.20 - - - <=0.05 <=0.01
MoLa >=99.95 - 0.01 ~ 1.0 - - <=0.05 <=0.01
MoK >=99.95 - - 0.01 ~ 0.60 - <=0.05 <=0.01
MoY >= 99.95 - - - 0.01 ~ 0.70 <= 0.05 <= 0.01
Mo1 >=99.95 - - - - <=0.05 <=0.01
Mo2 >=99.90 - - - - <=0.10 <=0.01 […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4188
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4188-2017 | Molybdenum bars and molybdenum rods | current edition | Current |
| GB/T 4188-1984 | Molybdenum bars and molybdenum rods | previous edition | Superseded |
This page sells the current edition, GB/T 4188-2017. Earlier editions are listed for reference only.
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