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GB/T 28908-2012: High-purity chromium metal
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High-purity chromium metal
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GB/T 28908-2012
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Basic data | Standard ID | GB/T 28908-2012 (GB/T28908-2012) | | Description (Translated English) | High-purity chromium metal | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H42 | | Classification of International Standard | 77.100 | | Word Count Estimation | 13,182 | | Quoted Standard | GB/T 3211-2008; GB/T 3650; GB/T 4010; GB/T 4702.3; GB/T 4702.8; GB/T 4702.9; GB/T 4702.11; GB/T 4702.14; GB/T 4702.16; GB/T 13247 | | Regulation (derived from) | National Standards Bulletin 2012 No. 28 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the requirements for high-purity metallic chromium, test methods, inspection rules, packaging, storage, marking and quality certification. This standard applies to hydrogen reduction through carbon reduction and the production of h | GB/T 28908-2012: High-purity chromium metal---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
High-purity chromium metal
ICS 77.100
H42
National Standards of People's Republic of China
High-purity metallic chromium
Issued on. 2012-11-05
2013-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Iron and Steel Association.
This standard by the national pig iron and ferroalloy Standardization Technical Committee (SAC/TC318) centralized.
This standard drafting of the main unit. Liaoning Shen Hong Group Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Wang Ping, Shang Kay East, Chenzi Bin, Dong Shuai ON TRADITIONAL Ye Sun, Sun Shengming.
High-purity metallic chromium
1 Scope
This standard specifies the requirements for high-purity metallic chromium, test methods, inspection rules, packaging, storage and transportation, marking and certification.
This standard applies to the reduction of carbon and hydrogen reduction through production of high purity metal chromium.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3211-2008 chromium
General provisions GB/T 3650 inspection, packing, storage and transportation, marking and certification of
GB/T 4010 alloy chemical analysis and preparation of samples
GB/T 4702.3 Methods for chemical analysis of chromium molybdenum blue spectrophotometric determination of phosphorus content
GB/T 4702.8 Methods for chemical analysis of chromium metal - The distillation - molybdenum blue spectrophotometric method for determination of arsenic content
GB/T 4702.9 Methods for chemical analysis of chromium metal crystal violet spectrophotometric determination of antimony content
GB/T 4702.11 Methods for chemical analysis of chromium metal alizarin violet spectrophotometric determination of tin content
Determination of carbon content GB/T 4702.14 Methods for chemical analysis of chromium metal - The infrared absorption method
GB/T 4702.16 chromium sulfur content - Infrared absorption method and combustion titration method
Sampling and testing methods GB/T 13247 ferroalloy product particle size
3 Requirements
3.1 Designation and chemical composition
3.1.1 High-purity chromium metal production process according to their different points of high-purity hydrogen reduction of chromium (GHCr series) and high purity carbon reduction of chromium
(GCCr series). Wherein the hydrogen reduction of high-purity metal chromium (GHCr series) and in accordance with chromium impurities divided into GHCr-1, GHCr-2 two
Grades; high-purity carbon reduction of chromium (GCCr series) into GCCr-1, GCCr-2, GCCr-3, GCCr-4 four grades, chemical composition
Shall comply with the requirements in Table 1 and Table 2.
Grade G represents the high-purity;
C represents carbon reduction;
H represents a hydrogen reduction;
Cr represents chromium.
Table 1 High-purity hydrogen reduction of chromium
Trademark
Chemical composition /% (mass fraction)
Cr Fe Al Si SPCNO Pb Cu
Not less than Not more than
GHCr-1 99.99 0.003 0.003 0.002 0.003 0.0015 0.012 0.002 0.01 0.0002 0.0003
GHCr-2 99.95 0.01 0.01 0.005 0.005 0.003 0.020 0.003 0.02 0.0005 0.0005
NOTE. chromium mass fraction of 100% minus the Fe, Si, Al, Cu, P, Pb six balance value of the sum of impurities found.
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