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GB/T 2523-2022 Related PDF English (GB/T 2523-2008, GB/T 2523-1990)

GB/T 2523-2022 (GB/T2523-2022, GBT 2523-2022, GBT2523-2022) & related versions
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GB/T 2523-2022English260 Add to Cart 0-9 seconds. Auto delivery. Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip GB/T 2523-2022 Valid GBT 2523-2022
GB/T 2523-2008English165 Add to Cart 0-9 seconds. Auto delivery. Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip) GB/T 2523-2008 Obsolete GBT 2523-2008
GB/T 2523-1990English359 Add to Cart 3 days Cold rolled sheet (strip)--Measuring method for surface roughness GB/T 2523-1990 Obsolete GBT 2523-1990
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GB/T 2523-2022 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.040.99 CCS H 21 Replacing GB/T 2523-2008 Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip ISSUED ON: JULY 11, 2022 IMPLEMENTED ON: FEBRUARY 01, 2023 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Terms and definitions ... 5  4 Symbols and descriptions ... 9  5 Principle ... 10  6 Specimens ... 10  7 Measurement requirements ... 10  8 Measurement procedure ... 13  9 Rounding of measurement values ... 15  10 Test report ... 15  Annex A (normative) Marciniak cup specimen processing ... 16  Annex B (informative) Example of applying standard blocks to verify measurement results ... 18  Annex C (informative) Measurement of filtered centre line waviness (WCA) ... 19  Bibliography ... 20  Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip 1 Scope This document specifies the principle, specimens, measurement requirements, measurement procedures, rounding of measurement values and test reports for surface roughness, peak count and waviness for cold-rolled metal sheet and strip. This document is applicable to the measurement of surface roughness, peak count and waviness for cold-rolled metal sheet and strip. It is also applicable to the cold-rolled metal sheet and strip with surface metal coating. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 3505-2009, Geometrical product specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters GB/T 6062-2009, Geometrical product specifications (GPS) - Surface texture: Profile method - Nominal characteristic of contact (stylus) instruments GB/T 8170, Rules of rounding off for numerical values and expression and judgement of limiting values JJF 1105, Calibration Specification for Contact (Stylus) Instruments of Surface Roughness Measurement by Profile Method 3 Terms and definitions For the purposes of this document, the terms and definitions defined in GB/T 3505- 2009 as well as the followings apply. 3.1 roughness average; Ra The arithmetic mean of the absolute value of the ordinate value Z(x) of the roughness profile within a sampling length, see Figure 1. to suppress short-wave components. 3.8 arithmetical mean deviation of waviness profile; Wa Arithmetic mean of absolute values of the ordinate values of the waviness profile Z(x) within a sampling length. It is calculated according to formula (1). 3.9 arithmetical mean of waviness profile; Wa0.8, Wsa1-5 Arithmetic mean of the absolute values of the ordinate values of the waviness profile Z(x) within an evaluation length. It is calculated according to formula (2). When Wa0.8 is selected, λs=8μm, λc=0.8mm. When Wsa1-5 is selected, λs=8μm, λc=1mm and λf=5mm. 3.10 filtered waviness curve The curve obtained after suppressing the short-wave portion with λc in the original profile. 3.11 centre line A reference line with a geometric profile that aligns with the profile within the sampling length. The profile is divided by this line within the sampling length so that the areas of the upper and lower sides are equal. [Source: GB/T 3505-1983, definition 1.21] 3.12 filtered centre line waviness curve The curve obtained by suppressing the long-wave portion using λf from the filtered waviness curve. 3.13 filtered centre line waviness; WCA Acquire a portion of length l along the filtered centre line waviness curve. The filtered centre line waviness curve is represented by Z=f(x). Take the centerline of the sampled section as the X axis. Its vertical magnification direction is used as the Z axis. Use formula (3) to define the filtered centre line waviness WCA, in microns (μm): 5 Principle Place a diamond stylus with a certain angle and tip radius vertically on the surface of the specimen with the specified contact force. Move in a straight line at a specified rate. The stylus moves vertically with the profile of the specimen surface. The tiny displacements generated by this movement are converted into electrical signals by the circuit and processed, and then Ra, Rz, Rz1 max, RPc (PPI), Wa, Wa0.8 and Wsa1-5 can be obtained. 6 Specimens 6.1 The sampling location shall be in accordance with the relevant product standards or agreements. When not specified, it is taken at a position that can represent the roughness and waviness of the entire metal sheet and strip. Generally, it is located at half the width of the strip. 6.2 For Ra, Rz, Rz1 max, RPc (or PPI), Wa and specimens that do not need to be punched into Marciniak cups to measure Wa0.8 and Wsa1-5, it is recommended to use a square (or circle) with a side length (or diameter) of 100mm. 6.3 When punching into Marciniak cups to measure Wa0.8 and Wsa1-5, the side length of the sample blank shall be at least 220mm×220mm. The plastic elongation (Apx and Apy) and the number of specimens in the two directions of the bottom of the Marciniak cup shall be specified in the relevant product standard or agreement. The processing method of Marciniak cup specimens shall comply with the provisions of Annex A. 6.4 Sample blanks and specimens shall be flat, free from scratches. The surface of the specimen shall be free from rust spots, stains and other surface defects. 6.5 Scrub the measurement area of the specimen with acetone or alcohol before measurement. Immediately measure. 7 Measurement requirements 7.1 Instruments 9 Rounding of measurement values The value of the measurement result shall be rounded up in accordance with the provisions of the relevant product standard or agreement. If not specified, the rounding shall be carried out according to the following requirements. The method of rounding is in accordance with GB/T 8170. - Ra, Rz, Rz1 max, Wa, Wa0.8 and Wsa1-5 are rounded to 0.01μm; - RPc (PPI) is rounded to 1. 10 Test report If applicable, the test report shall include at least the following: a) Reference to this document; b) Specimen number; c) Name and designation of material; d) Stylus angle and tip radius; e) Measuring direction; f) Measurement selected λs, λc and λf lengths (when used); g) Measurement results of Ra, Rz, Rz1 max, Wa, Wa0.8 and Wsa1-5 (when measurement is required) and plastic elongation of Wa0.8 and Wsa1-5 (when using Marciniak cup specimens); h) Measurement result of RPc (or PPI) and the peak count level used (when measurement is required); i) All measurement conditions that differ from those specified in this document. Annex C (informative) Measurement of filtered centre line waviness (WCA) C.1 Overview This appendix gives definitions and measurement parameters related to filtered centre line waviness (WCA). NOTE: Some cold-rolled automotive sheet users require this indicator to be measured. C.2 Test parameter settings Use the following parameter settings to measure the filtered centre line waviness: a) Adopt 2RC75 filter; b) The wavelength λc used to suppress the short-wave part is generally 0.8mm; c) The wavelength λf used to suppress the long-wave part is generally 8mm; d) The measurement length used to test WCA is generally 25mm. C.3 Measurement The specimen is generally a square (or circle) with a side length (or diameter) of 100mm. When measuring, a stylus with a nominal tip angle of 90° and a radius (rtip) of 5μm shall be used. Place the specimen flat on the measuring table. The direction of stylus travel is in accordance with the relevant product standards or agreements. When not specified, the stylus travel direction is perpendicular to the rolling direction. The measurement surface of each specimen is measured at least three times. Take the arithmetic mean as the measurement result. C.4 Rounding of measurement values The measurement result WCA is rounded to 0.01μm. The rounding method is in accordance with GB/T 8170. ......


GB/T 2523-2008 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.040.99 H 21 Replace GB/T 2523-1990 Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip) ISSUED ON. OCTOBER 10, 2008 IMPLEMENTED ON. MAY 1, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of Contents Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Test requirements... 6 5 Measurement process and results... 8 6 Test report... 8 Appendix A (Normative) Measurement of waviness of filtering center axis WCA... 9 Appendix B (Informative) Example of verification of nominal values of a standard block... 10 References... 11 Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip) 1 Scope This standard specifies the terms and definitions, test requirements, measurement process and results, and test reports of the surface roughness and the peak count of cold- rolled metal sheets (strips). This standard applies to the measurement of the surface roughness and the peak count of cold-rolled metal sheets (strips). 2 Normative references The provisions in the following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies to this Standard. GB/T 3505-2000 Geometrical product specifications (GPS) -- Surface texture. Profile method -- Terms, definitions and surface texture parameters [ISO 4287.1997, Geometric product specifications (GPS) surface texture. profile method, terms, definitions and surface texture parameters, MOD] 3 Terms and definitions The terms and definitions defined in GB/T 3505-2000 and the following apply to this standard. Note. See Appendix A for definitions and measurement parameters related to of waviness of filtering center axis WCA. 3.1 Roughness average Ra The arithmetic mean deviation of the roughness profile, that is, the arithmetic mean of the absolute value of the roughness profile deviation within the sampling length, in 5 Measurement process and results 5.1 The instrument shall be calibrated with a standard block before measurement, and the relative error of the measured value shall not be greater than 5%. Note. Appendix B gives an example of the verification of the nominal value of the standard block. 5.2 The measuring table shall be stable, and the measurement shall be carried out in a dry, no vibration, and non-corrosive atmosphere. 5.3 When measuring, place the sample flat on the measuring table, and make the stroke direction of the stylus perpendicular to the rolling direction. 5.4 The sum of the respective evaluation lengths of the front and back sides of each sample shall not be less than 25λC. If measuring several times, take the arithmetic mean value of these measurement results. 5.5 The test shall be carried out at a temperature of (20±10) °C, otherwise, it shall be noted in the test report. 6 Test report If applicable, the test report shall include the following. a) Number of this standard; b) Sample identification; c) The selected length of λC for measurement; d) The arithmetic mean value of Ra; e) The arithmetic mean values of RPC (or PPI) and the used peak count level (when the measurement is required); f) All measurement conditions other than those specified in this standard. Appendix A (Normative) Measurement of waviness of filtering center axis WCA This appendix gives the definitions and measurement parameters related to the waviness of filtering center axis WCA. Note. Some users of cold-rolled automotive sheets require the measurement of this indicator. A.1 Terms and definitions A.1.1 Curve of filtering wave The curve obtained by suppressing the short-wave part of the original profile. A.1.2 Waviness curve of filtering center axis The curve obtained by suppressing the long-wave part of the filtering wave curve. A.1.3 Waviness of filtering center axis WCA Collect a certain length (l) along the waviness curve of the filtering center axis, and express the waviness curve of filtering center axis as Z = f (x); take the center axis of the sampled part as X-axis and its vertical amplification direction as Z-axis; use the following formula to define the waviness of filtering center axis WCA, in microns (μm). Where. [f (x)]C --- The Z value that is corresponding to the X position on the waviness curve of filtering center axis. A.2 Test parameter settings The wavelength used for suppressing the short-wave part is generally 0.8 mm; The wavelength used for suppressing the long-wave part is generally 8 mm; The travel length used for the test of WCA is generally 25 mm. ......

BASIC DATA
Standard ID GB/T 2523-2022 (GB/T2523-2022)
Description (Translated English) Measuring method of surface roughness, peak count and waviness for cold-rolled metal sheet and strip
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H21
Classification of International Standard 77.040.99
Word Count Estimation 18,156
Date of Issue 2022-07-11
Date of Implementation 2023-02-01
Older Standard (superseded by this standard) GB/T 2523-2008
Drafting Organization Baoshan Iron and Steel Co., Ltd., Shougang Jingtang Iron and Steel Co., Ltd., Shenzhen Wanshi Testing Equipment Co., Ltd., Metallurgical Industry Information Standards Research Institute, Shougang Group Co., Ltd., Beijing Times Zhifeng Technology Co., Ltd., FAW-Volkswagen Automobile Co., Ltd., Anhui Jianghuai Automobile Group Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee (SAC/TC 183)
Proposing organization China Iron and Steel Association
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

BASIC DATA
Standard ID GB/T 2523-2008 (GB/T2523-2008)
Description (Translated English) Measuring method of surface roughness and peak count for cold-rolled metal sheet (strip)
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H21
Classification of International Standard 77.040.99
Word Count Estimation 9,994
Date of Issue 2008-10-10
Date of Implementation 2009-05-01
Older Standard (superseded by this standard) GB/T 2523-1990
Quoted Standard GB/T 3505-2000
Adopted Standard SAE J911-1998, NEQ
Drafting Organization Baoshan Iron & Steel Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2008 No.17 (Total No.130)
Proposing organization China Iron and Steel Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the terms and definitions of cold-rolled sheet metal (with) the surface roughness and the peak number, testing requirements, measurement process and results and test reports. This standard applies to the measurement of cold-rolled sheet metal (with) the surface roughness and the peak number.

BASIC DATA
Standard ID GB/T 2523-1990 (GB/T2523-1990)
Description (Translated English) Cold rolled sheet (strip)--Measuring method for surface roughness
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H21
Classification of International Standard 77.140.50
Word Count Estimation 9,950
Date of Issue 1990/7/21
Date of Implementation 1991/7/1
Older Standard (superseded by this standard) GB 2523-1981
Regulation (derived from) Announcement of Newly Approved National Standards No. 17 of 2008 (No. 130 overall)
Proposing organization Ministry of Metallurgical Industry of the People Republic of China
Issuing agency(ies) State Bureau of Technical Supervision