GB/T 728-2010 (GBT 728-2010)

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GB/T 728-2010	English	279	Add to Cart	3 days	Ingot tin	GB/T 728-2010	Obsolete	GB/T 728-2010

GB/T 728-2010
Ingot tin
ICS 77.120.60
H62
National Standards of People's Republic of China
Replacing GB/T 728-1998
Tin ingots
Issued on. 2011-01-10
2011-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard reference to American Standard ASTM B339-2005 "tin ingots," the EU standard EN610.1995 "tin ingots," Japan Standard
JISH2018-1996 "tin" be revised.
This standard replaces GB/T 728-1998 "tin ingots."
This standard and GB/T 728-1998 compared to the main changes are as follows.
--- The standard adds low-lead products, according to the lead content of impurities is divided into A, AA grade two. Tin ingots grades. Sn99.90A, Sn99.90AA,
Sn99.95A, Sn99.95AA, Sn99.99A;
--- The standard chemical composition made some changes, adding sulfur, silver, nickel, cobalt and four impurity element content requirements;
--- This standard increased sampling and preparation of product requirements;
--- The standard definition of tin increased molecular weight and molecular formula;
--- The standard of the original standard "4 of ordering the contract" to "8 contracts (or orders) content."
The standard proposed by China Nonferrous Metals Industry Association.
This standard Nonferrous Metals by the National Standardization Technical Committee.
This standard by the Yunnan Tin Group (Holdings) Co., Ltd. is responsible for drafting.
The standard by the China Nonferrous Metals Industry Standards Metrology and Quality Institute, Guangxi China Tin Group Co., Ltd. participated in the drafting.
The main drafters of this standard. white Jian, Cao Jing, Tan Yong, Wang Yan Kun, Suzhou and Hangzhou, Zhao Junfeng.
This standard replaces the standards previously issued as follows.
--- GB/T 728-1998, GB 728-1984, GB 728-1965.
Tin ingots
1 Scope
This standard specifies the tin ingot product requirements, test methods, inspection rules and signs, packaging, transportation, storage, quality certificate and contract (or
Orders) content.
This standard applies to fire or electrolytic refining of tin ingots produced products.
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 3260 Methods for chemical analysis of tin
GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment
3 definitions, symbols, units and abbreviations
The following definitions, symbols, units and abbreviations apply to this standard.
3.1
Formula Moleculeformula
The product of the formula. Sn
3.2
Relative molecular mass Relativemolecularmass
118.710 (2007 Edition)
3.3
Ingot Ingot
Mold molten metal into a shaped cast metal block.
4 Requirements
4.1 Categories
Press tin ingots chemical composition and impurities of lead content is divided into three grades, each grade is divided into two levels.
4.2 tin ingots chemical composition should be consistent with Table 1.
4.2.1 The chemical composition with special requirements, negotiated by both parties.
4.2.2 tin content is 100% minus the sum of impurities found in the table margin.
4.3 Appearance quality. Tin ingot surface should be clean, no burrs and foreign inclusions.
4.4 tin ingots single weight 25kg ± 1.5kg, any special requirements, negotiated by both parties to resolve.
5 Test methods
Analysis of the chemical composition of arbitration according to the provisions 5.1 tin ingots GB/T 3260 will be.