BZJ472-2014 English PDF

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BZJ472-2014: Cold-rolled steel strip for color picture tube shadow mask

BZJ472: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
BZJ 472-2014	139	Add to Cart	2 days	Cold-rolled steel strip for color picture tube shadow mask
BZJ 472-2009	159	Add to Cart	2 days	Cold-rolled hard steel strip for color picture tube shadow mask	Obsolete

Similar standards

BZJ 464   BZJ 465   BZJ 463   

Basic data

Standard ID: BZJ 472-2014 (BZJ472-2014)
Description (Translated English): Cold-rolled steel strip for color picture tube shadow mask
Sector / Industry: Chinese Industry Standard
Word Count Estimation: 3,370
Issuing agency(ies): Baosteel Group Corporation

BZJ472-2014: Cold-rolled steel strip for color picture tube shadow mask

---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.
Cold-rolled steel strip for color picture tube shadow mask Baoshan Iron & Steel Co., Ltd. Interim Technical delivery conditions A shadow mask color picture tube and cold rolled strip 1 Scope Replacing BZ J 472-2009 The shadow mask color picture tube Technical delivery conditions apply to interim Baoshan Iron & Steel Co., Ltd. production of cold rolled strip (Hereinafter referred to as strip). 2 Normative References The following documents for the application of this document is essential. For dated references, only the Release date applies to this document. For undated references, the latest edition (including all amendments ) Apply to this document. GB/T 222-2006 finished steel chemical composition and permissible variations GB/T 223 steel and alloy chemical analysis method RT Test Method. Test Part 1 GB/T 228.1-2010 metal material tensile GB/T 230.1-2009 metal Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T scales) Methods of measurement GB/T 2523-2008 cold-rolled sheet metal (with) the surface roughness and peak number of GB/T 2975-1998 steel and steel products for mechanical testing and sample preparation position GB/T 3505-2000 Geometrical product specification the term structure of the surface contours of the surface structure of the law, definitions and parameters GB/T 4336-2002 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method) GB/T 20066-2006 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method GB/T 20123-2006 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (conventional method) Inductively coupled plasma atomic GB/T 20125-2006 low-alloy steel multi-element content Emission Spectrometry GB/T 20126-2006 Determination of non-alloy steel of low carbon content - Part 2. induction furnace (preheated) combustion within Infrared absorption method Size Q/BQB 401 cold-rolled steel sheet and strip, shape, weight and tolerance Q/BQB 408 cold forming of cold-rolled carbon steel sheet and strip JIS Z2241.2011 Metallic materials - Tensile testing-- Method of test at room temperature

3 Classification and designation

Steel grades and use shall comply with the provisions in Table 1. Table 1 Trademark use BAK shadow mask color picture tube 4 size, shape, weight and tolerance 4.1 strip specifications available to comply with Table 2. Table 2 Unit. mm Grade Thickness Width inner diameter BAK 0.17 ~ 0.25 680 ~ 1050 508 (including sleeve) 4.2 strip thickness tolerance of ± 0.005mm, width tolerance of 0mm ~ 1mm. 4.3 Other dimensions, shape, weight and tolerances shall comply with the provisions of Q/BQB401 of.

5 Technical requirements

5.1 chemical composition of steel (melting component) shall comply with the requirements of Table 3. Finished steel sheet and strip chemical composition deviation should be allowed breaks Co GB/T 222 requirements. table 3 Chemical composition (Heat analysis)% (by mass) C Si Mn P S Alt BAK ≤0.002 ≤0.03 0.10 ~ 0.25 ≤0.012 ≤0.008 0.002 ~ 0.080 5.2 steel smelting method used in steel using oxygen transfer Smelting furnace. Baoshan Iron & Steel Co. 2014-10-18 Issued on. 2015-03-31 before implementation   5.3 Delivery status of cold-rolled steel, electrolytically degreased and low temperature annealing reply, coated with anti-rust oil, cutting State delivery. 5.4 Mechanical Properties Mechanical properties of steel shall conform to Table 4. When the steel sheet and strip with a nominal thickness of not more than 0.20mm, the hardness should be measured Use HR15Tm, then according to the provisions in Appendix A (normative) converted into HR30Tm. The average hardness value of three tests value. Table 4 Trademark Tensile test a hardness HR30Tm not less than tensile strength MPa The Elongation A50mm% no greater than BAK 500 ~ 700 15 65 Sample, specimen orientation No.5 a sample of JIS Z2241 predetermined transverse. 5.5 strip surface roughness should meet the requirements of Table 5. table 5 Grade surface roughness The average surface roughness Ra μm The maximum height of profile Rz (Rmax) μm no greater than Evaluation deflection rate profile Rsk (Sk)% more than the The average width of the contour unit RSm (Sm) μm BAK 0.45 ~ 0.70 6.0 0 50 ~ 130

6 inspection and testing

6.1 strip appearance was visually inspected. 6.2 size of the strip, the shape should be appropriate measurement tool. 6.3 tensile test shall be in accordance with GB/T 228.1 Method B. In order to improve the reproducibility of the measurement results, we recommend using the beam displacement Control method, the yield strength measured rate of 5% Lc/min, as measured parallel to the tensile rate (Lc of the sample 40% Lc/min length). 6.4 Acceptance strip should grant each inspection lot shall be not more than 30 tons of the same grade, same size, same strip processing status composition. For weighing more than 30 tons of steel, each composed of a coil inspection lot. 6.5 each batch of test strip project, the number of tests, sampling methods and test methods shall comply with the provisions in Table 6. 6.6 The supplier may use different tests and test methods for acceptance testing. Event of a dispute, should present technical conditions Inspection and testing methods and related technical requirements for testing. Table 6 Test items test Quantity (A) Sampling methods experiment method Chemical analysis 1/furnace GB/T 20066 GB/T 223, GB/T 4336, GB/T 20123, GB/T 20125, GB/T 20126 Tensile test 1/batch GB/T 2975 GB/T 228.1 Method B Hardness test 1/batch GB/T 230.1 The average surface roughness Ra 1/batch GB/T 2523 The maximum height of profile Rz (Rmax) GB/T 3505 assessment profile skewness Rsk (Sk) The average width of the contour unit RSm (Sm) 7 Other strip other requirements (including size, shape, weight and tolerances, delivery status, surface quality, inspection and testing , Packaging, labeling and inspection documents, rounding off, etc.) should be consistent with Q/BQB 408's provisions.   Appendix A (normative Appendix) HR15Tm and HR30Tm conversion table Table A.1 HR15Tm conversion HR30Tm HR15T conversion HR30Tm 93.0 82.0 83.0 62.5 92.5 81.5 82.5 61.5 92.0 80.5 82.0 60.5 91.5 79.0 81.5 59.5 91.0 78.0 81.0 58.5 90.5 77.5 80.5 57.0 90.0 76.0 80.0 56.0 89.5 75.5 79.5 55.0 89.0 74.5 79.0 54.0 88.5 74.0 78.5 53.0 88.0 73.0 78.0 51.5 87.5 72.0 77.5 51.0 87.0 71.0 77.0 49.5 86.5 70.0 76.5 49.0 86.0 69.0 76.0 47.5 85.5 68.0 75.5 47.0 85.0 67.0 75.0 45.5 84.5 66.0 74.5 44.5 84.0 65.0 74.0 43.5 83.5 63.5 73.5 42.5 ......

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