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GB/T 1941-2009 English PDF

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GB/T 1941-2009: Method of testing in hardness of wood
Status: Obsolete

GB/T 1941: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 1941-2009English279 Add to Cart 3 days [Need to translate] Method of testing in hardness of wood Obsolete GB/T 1941-2009
GB/T 1941-1991English199 Add to Cart 2 days [Need to translate] Method of testing in hardness of wood Obsolete GB/T 1941-1991

PDF similar to GB/T 1941-2009


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Basic data

Standard ID GB/T 1941-2009 (GB/T1941-2009)
Description (Translated English) Method of testing in hardness of wood
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B60
Classification of International Standard 79.020
Word Count Estimation 6,616
Date of Issue 2009-02-23
Date of Implementation 2009-08-01
Older Standard (superseded by this standard) GB/T 1941-1991
Quoted Standard GB/T 1928-2009; GB/T 1929-2009; GB/T 1931-2009
Regulation (derived from) National Standard Approval Announcement 2009 No.3 (Total No.143)
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 determination of the hardness of the wood test equipment, test procedure, , specimens and test results are recorded the results of the calculation and reporting. This standard applies to small sample diameter timber unblemished surface, chord plane, determination of the end surface hardness.

GB/T 1941-2009: Method of testing in hardness of wood

---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.
Method of testing in hardness of wood ICS 79.020 B60 National Standards of People's Republic of China Replacing GB/T 1941-1991 Wood hardness test (ISO 3350. 1975, Wood-Determinationofstatichardness, MOD) Posted 2009-02-23 2009-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts the International Standard ISO 3350. 1975 "Wood static hardness measuring." This standard and ISO 3350. 1975 compared to the main technical content differences are as follows. --- Modify 6.2, respectively, in each sample should be two chord plane, two-diameter surface and both end faces of each test time (1975 and Excerpts 6.2); --- Modify 7.3, hardness of the sample moisture content of 12%, shall be type H12 = HW [1 + 0.03 (W-12)] Calculation (1975 and Excerpts of 7.3). This standard replaces GB/T 1941-1991 "Test Methods for hardness of wood." This standard compared with GB/T 1941-1991, the main changes are as follows. --- Amend Chapter 3, 4.2 and Fig 1,6.3,7.1 Hemispheric steel indenter (1991 Excerpts of 3,4.2 and 1,6.3 and 7 and FIG. 1); --- 4.3 modify, wood moisture content determination equipment shall comply with GB/T 1931-2009 the provisions of Chapter 3 (1991 edition and 4.3); --- Modify 6.2, respectively, in each sample should be two chord plane, two-diameter surface and both end faces of each test time (1991 and Excerpts 6.2); --- Remove 6.3 "will load readings fill the Appendix A (Supplement) records in the table" (1991 edition and 6.3); --- Modification 7.2, the test results of two string sample surface, two-diameter surface and both end surfaces depicting mean, as each side of the sample Hardness (1991 edition and 7.2); --- Edit "8 test results recording and reporting", test results are reported in accordance with Appendix A fill; the test report according to GB/T 1928-2009 7.4 Content guidelines for preparation (1991 and Chapter 8 of this edition); --- Increase in Appendix A test site, end load, load string side and radial load surface, remove moisture, face hardness, surface hardness and chord diameter Surface hardness (1991 edition and Appendix A). Appendix A of this standard is a normative appendix. This standard was proposed by the State Forestry Administration. This standard by the National Standardization Technical Committee timber. This standard is drafted by. Anhui Agricultural University. Participated in the drafting of this standard. International Bamboo and Rattan Network Center, Northeast Forestry University. The main drafters of this standard. Wangyou Hong, Jiang Zehui, Liu Xing, Wang Chuangui, Liuxing E. This standard was first published in 1980, in May 1991 the first amendment. This standard by the National Standardization Technical Committee responsible for the interpretation of wood. Wood hardness test

1 Scope

This standard specifies the determination of test equipment, samples, wood hardness testing procedures, the results of calculations and test results are recorded and reporting. This standard applies to the small sample timber unblemished surface diameter, chord surface, measuring the end face of hardness.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 1928-2009 General physical and mechanical test methods (ISO 3129. 1975, Wood-Samplingmethodsand generalrequirementsforphysicalandmechanicaltests, NEQ) GB/T 1929-2009 physical and mechanical test materials and test specimens sawing method (ISO 3129. 1975, Wood-Sampling methodsandgeneralrequirementsforphysicalandmechanicaltests, MOD) GB/T 1931-2009 Method for determination of moisture content of wood (ISO 3130. 1975, Wood-Determinationofmoisture contentforphysicalandmechanicaltests, MOD) Principle 3 Other rigid timber having a resistance pushed with hemispherical steel indenter predetermined radius in the static load under pressure into the timber to indicate their hardness.

4 Test Equipment

4.1 test machine, load measurement accuracy should be consistent with GB/T 1928-2009 Chapter 6 requirements. 4.2 Electric contact type hardness test apparatus comprising a radius of (5.64 ± 0.01) mm steel hemispherical indenter. Allows the use of having the same radius Hemispherical steel indenter other types of test equipment as shown in Figure 1. Millimeters 1 --- hemispherical steel head; 2 --- adjustment screw (on contact); 3 --- having contact spring means; 4 --- sleeve.

1 electric contact type hardness test equipment


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