標準編號:	GB/T 12754-2019
中文名稱:	彩色涂層鋼板及鋼帶
英文名稱:	Prepainted steel sheet and strip
中標分類:	H46    鋼板、鋼帶
行業分類:	GB    國家標準
ICS分類:	77.140.50 77.140.50    扁平鋼和半成品 77.140.50
發布機構:	國家市場監督管理總局 國家標準化管理委員會
發布日期:	2019-03-25
實施日期:	2020-2-1
標準狀態:	valid
替代舊標準:	GB/T 12754-2006 彩色涂層鋼板及鋼帶
翻譯語言:	英文
文件格式:	PDF
中文字符數:	25000 字
翻譯價格(元):	850.0
交付時間:	付款后 1 個工作日

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 12754-2006 Prepainted steel sheet. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 12754-2006: —— normative references of GB/T 228, GB/T 1839 and GB/T 2975 are deleted, and normative reference of GB/T 8170 is added (see clause 2 of this standard and clause 2 of Edition 2006); —— the definition of “prepainted steel sheet” is modified (see 3.1 of this standard and 3.1 of Edition 2006); —— the designation expression method is modified, with example added (see 4.1 of this standard and 4.1 of Edition 2006); —— designation and purpose of prepainted steel sheet are deleted (see 4.2 of Edition 2006) —— two types of steel substrate for prepainted steel sheet are added: hot-dip aluminium-silicon alloy steel substrate and hot-dip aluminum-magnesium alloy steel substrate (see Table 1); —— the coating sheet in the previous edition is modified into ordinary coating sheet, and coating surface states are added: checkered sheet, velvet sheet, pearlescent sheet, and frosted sheet (see Table 1 of this standard and Table 2 of Edition 2006); —— finish paint functions of ordinary, self-cleaning, anti-static, anti-bacterial, and thermal insulation are added (see Table 1); —— the default dimension and flatness precision grade when ordering are added (see 5.2); —— requirements are modified for the width, length, shape of prepainted steel sheet and the thickness of its steel substrate (see 6.2 of this standard and 6.1.3 of Edition 2006); —— regulations are added for the cases when users have requirements on the inner diameter tolerance of steel coil (see Table 2); —— requirements are added that the mechanical property, plating property and plating weight of the prepainted steel sheet shall meet the requirements of the standards for steel substrate of corresponding designation (see 7.1.1.1); —— the recommended nominal plating weight of each steel substrate type under different corrosive environments is deleted (Table 4 of Edition 2006); —— the requirement is added for the color difference of coating (see 7.1.2.3); —— the grading and test time of resistance to neutral salt spray are modified (see 7.1.2.7 of this standard and 7.3.1 of Edition 2006); —— the grading of accelerated weathering by ultraviolet lamp is modified, and the evaluations for discoloration and dulling are added (see 7.1.2.7 of this standard and 7.3.2 of Edition 2006); —— requirements are modified for the test of accelerated weathering by ultraviolet lamp (see 7.1.2.8 of this standard and 7.3.2 of Edition 2006); —— the antistatic property of antistatic prepainted steel sheet and self-cleaning property of the self-cleaning prepainted steel sheet are added (see 7.1.2.9 and 7.1.2.10); —— descriptions and technical requirements are added for checkered sheet, velvet sheet, pearlescent sheet and frosted sheet (see 7.2.3, 7.2.4, 7.2.5 and 7.2.6); —— the sampling number for test items other than coating thickness test is modified (see Table 8 of this standard and Table 11 of Edition 2006); —— typical atmospheric environment types corresponding to different corrosivity classes in Annex A are modified, and permissible deviations of the dimension and shape of prepainted steel sheet are deleted (see Annex A of this standard and Annex A of Edition 2006); —— Annex B Mechanical properties of the prepainted steel sheet is deleted (see Annex B of Edition 2006); —— Annex C Table of comparison of designations of domestic and foreign steel substrates commonly used for prepainted steel sheet is deleted (see Annex C of Edition 2006); ——Annex D Typical atmospheric environment types corresponding to different corrosivity classes is modified (see Annex A of this standard and Annex D of Edition 2006). This standard was proposed by the China Iron and Steel Association. This standard is under the jurisdiction of SAC/TC 183 National Technical Committee on Iron and Steel of Standardization Administration of China. The previous editions of this standard are as follows: —— GB/T 12754-1991 and GB/T 12754-2006. Prepainted steel sheet and strip 1 Scope This standard specifies the terms and definitions, designation expression methods, classification and code, order details, dimension, shape, weight, technical requirements, test methods, inspection rules, packaging, marking, and product quality certificate in connection with prepainted steel sheet and strip. This standard is applicable to the prepainted steel sheet and strip (hereinafter referred to as "prepainted steel sheet") for building exterior and interior applications. This standard may serve as a reference for prepainted steel sheet for household electrical appliances and other purposes. 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 247 General rule of package, mark and certification for steel plates (sheets) and strips GB/T 1766-2008 Paints and varnishes - Rating schemes of degradation of coats GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 13448 Test methods for prepainted steel sheet GB/T 17505 Steel and steel products - General technical delivery requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 prepainted steel sheet the product obtained by baking and curing after continuously coating organic coating materials on the steel substrate which has been subjected to surface pretreatment 3.2 steel substrate steel strip for coating 3.3 top side one of the two sides of the prepainted steel sheet that has higher requirements on color, coating property, surface quality, etc. 3.4 bottom side the other side of the prepainted steel sheet opposite to the top side 3.5 building exterior applications applications affected by exterior atmospheric environment 3.6 building interior applications applications affected by interior atmosphere 3.7 coating hardness the ability of the coating to resist mechanical actions such as scratch, friction, collision and indentation 3.8 flexibility the ability of the coating to deform with the steel substrate without damage 3.9 adhesion the degree of firmness between coatings or between coating and steel substrate 3.10 life to the first major maintenance the interval time between the end of manufacturing and the time when the property of the original coating degrades to the condition that its protection on the steel substrate can only be maintained through overhaul Note: Overhaul refers to the maintenance and repair work that must be carried out on the building when the paint film becomes incomplete due to weathering or the steel substrate is perforated, including repainting, local replacement, etc. 3.11 durability the ability of the coating to reach the specified life to the first major maintenance 3.12 weathering the phenomenon that the coating property gradually degrades under the influence of the application environment 4 Expression method, classification and code of designation 4.1 Designation expression methods The designation of prepainted steel sheet consists of capital letter T plus the designation of steel substrate. Example 1: TDX51D+Z —— representing the prepainted steel sheet with a steel substrate of designation DX51D+Z. Example 2: TDC01+ZE —— representing the prepainted steel sheet with a steel substrate of designation DC01+ZE. Example 3: TS300GD+AZ —— representing the prepainted steel sheet with a steel substrate of designation S300GD+AZ. 4.2 Classification and code 4.2.1 See Table 1 for the classification and code of prepainted steel sheet. 4.2.2 If steel substrate not included in Table 1 in terms of application, steel substrate type, coating surface state, finish paint type, finish paint function, coating structure, surface structure of hot-dip zinc steel substrate, resistance to neutral salt spray, and accelerated weathering by ultraviolet lamp, it shall be negotiated when ordering. Table 1 Classification and code Classification Item Code Application Building exterior applications JW Building interior applications JN Household electrical appliances JD Others QT Steel substrate type Hot-dip zinc steel substrate Z Hot-dip zinc-iron alloy steel substrate ZF Hot-dip aluminium-zinc alloy steel substrate AZ Hot-dip zinc-aluminium alloy steel substrate ZA Hot-dip aluminium-silicon alloy steel substrate AS Hot-dip zinc-aluminum-magnesium alloy steel substrate ZM Zinc electroplated steel substrate ZE Surface state of coating Ordinary coating sheet TC Embossed sheet YA Printed sheet YI Checkered sheet WA Velvet sheet RO Pearlescent sheet ZH Frosted sheet MO Finish paint type Polyester PE Silicon-modified polyester SMP High-durability polyester HDP Polyvinylidene difluoride PVDF Finish paint function Ordinary - Self-cleaning AP Anti-static AS Anti-bacterial AB Thermal-insulation AH Coating structure Two layers of coating on the top side and one on the bottom side 2/1 Two layers of coating on the top side and two on the bottom side 2/2 Surface structure for hot-dip zinc steel substrate Minimized spangle MS Free of spangle FS Resistance to neutral salt spray Grade 1 S1 Grade 2 S2 Grade 3 S3 Grade 4 S4 Accelerated weathering by ultraviolet lamp Grade 1 U1 Grade 2 U2 Grade 3 U3 Grade 4 U4 5 Order contents 5.1 Contracts or orders made based on this standard shall cover the following items: a) product name (steel sheet or strip); b) number of the standard; c) designation; d) product specifications; e) dimension and flatness precision; f) inner diameter of steel coil (for steel strip); g) plating weight of steel substrate; h) surface structure of steel substrate (for hot-dip galvanized steel substrate); i) coating structure; j) coating surface state; k) type and color of finish paint; l) function of finish paint; m) weight; n) packaging method; o) application; p) other special requirements. 5.2 If dimension and flatness precision is not specified in the order contract, the products shall be supplied based on general precision.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Expression method, classification and code of designation 5 Order contents 6 Dimension, shape and weight 7 Technical requirements 8 Test method 9 Inspection rules 10 Packaging, marking and quality certificate 11 Description of corrosivity of service environment for prepainted steel sheet 12 Selection of prepainted steel sheet 13 Storage, transport and loading and handling of prepainted steel sheet 14 Processing of prepainted steel sheet 15 Life to the first major maintenance and durability of prepainted steel sheet 16 Atmospheric exposure test sites for prepainted steel sheet Annex A (Informative) Description of service environment corrosivity of prepainted steel sheet Annex B (Informative) Selection of prepainted steel sheet Annex C (Informative) Storage, transport and handling of prepainted steel sheet Annex D (Informative) Processing of prepainted steel sheet Annex E (Informative) Life to the first major maintenance and durability of prepainted steel sheet Annex F (Informative) Atmospheric exposure test sites for prepainted steel sheet

彩色涂層鋼板及鋼帶 1 范圍 本標準規定了彩色涂層鋼板及鋼帶的術語和定義，牌號表示方法、分類及代號，訂貨內容，尺寸、外形、重量，技術要求，試驗方法，檢驗規則，包裝、標志及質量證明書。 本標準適用于建筑內、外用途的彩色涂層鋼板及鋼帶(以下簡稱為彩涂板)。家電及其他用途的彩涂板可參考使用。 2規范性引用文件 下列文件對于本文件的應用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。 GB/T 247鋼板和鋼帶包裝、標志及質量證明書的一般規定 GB/T 1766—2008色漆和清漆 涂層老化的評級方法 GB/T 8170數值修約規則與極限數值的表示和判定 GB/T 13448 彩色涂層鋼板及鋼帶試驗方法 GB/T 17505 鋼及鋼產品交貨一般技術要求 3術語和定義 下列術語和定義適用于本文件。 3.1 彩涂板prepainted steel sheet 在經過表面預處理的基板上連續涂覆有機涂料，然后進行烘烤固化而成的產品。 3.2 基板 steel substrate 用于涂覆涂料的鋼帶。 3.3 正面top side 彩涂板兩個表面中對顏色、涂層性能、表面質量等有較高要求的一面。 3.4 反面 bottom side 彩涂板相對于正面的另一個表面。 3.5 建筑外用 building exterior applications 受外部大氣環境影響的用途。 3.6 建筑內用 building interior applications 受內部氣氛影響的用途。 3.7 涂層硬度 coating hardness 涂層抵抗擦劃傷、摩擦、碰撞、壓入等機械作用的能力。 3.8 柔韌性 flexibility 涂層與基板共同變形而不發生破壞的能力。 3.9 附著力 adhesion 涂層間或涂層與基板間結合的牢固程度。 3.10 使用壽命life to the first major maintenance 從制造完成之日開始到原始涂層的性能下降到必須對其進行大修才能維持其對基板的保護作用時的間隔時間。 注：大修是指當漆膜因老化而變得不完整或基板穿孔時必須對建筑物進行的維護、維修工作，包括重新噴漆、局部更換等。 3.11 耐久性durability 涂層達到規定使用壽命的能力。 3.12 老化 weathering 涂層在使用環境的影響下性能逐漸發生劣化的現象。 4牌號表示方法、分類及代號 4.1 牌號表示方法 彩涂板的牌號由大寫英文字母T加基板牌號組成。 示例1：TDX51D+Z ——表示基板牌號為DX51D+Z的彩涂板。 示例2：TDC01+ZE ——表示基板牌號為DC01+ZE的彩涂板。 示例3：TS300GD+AZ ——表示基板牌號為S300GD+AZ的彩涂板。 4.2分類及代號 4.2.1 彩涂板的分類及代號見表1。 4.2.2如需表1以外用途、基板類型、涂層表面狀態、面漆種類、面漆功能、涂層結構、熱鍍鋅基板表面結構、耐中性鹽霧性能和紫外燈加速老化性能的彩涂板應在訂貨時協商。 表1 分類及代號 分類 項目 代號 用途 建筑外用 JW 建筑內用 JN 家電 JD 其他 QT 基板類型 熱鍍鋅基板 Z 熱鍍鋅鐵合金基板 ZF 熱鍍鋁鋅合金基板 AZ 熱鍍鋅鋁合金基板 ZA 熱鍍鋁硅合金基板 AS 熱鍍鋅鋁鎂合金基板 ZM 電鍍鋅基板 ZE 涂層表面狀態 普通涂層板 TC 壓花板 YA 印花板 YI 網紋板 WA 絨面板 RO 珠光板 ZH 磨砂板 MO 面漆種類 聚酯 PE 硅改性聚酯 SMP 高耐久性聚酯 HDP 聚偏二氟乙烯 PVDF 面漆功能 普通 自潔 AP 抗靜電 AS 抗菌 AB 隔熱 AH 涂層結構 正面二層、反面一層 2/1 正面二層、反面二層 2/2 熱鍍鋅基板表面結構 小鋅花 MS 無鋅花 FS 耐中性鹽霧性能 1級 S1 2級 S2 3級 S3 4級 S4 紫外燈加速老化性能 1級 U1 2級 U2 3級 U3 4級 U4 5訂貨內容 5.1 按照本標準訂貨的合同或訂單應包括下列內容： a) 產品名稱(鋼板或鋼帶)； b)標準編號； c) 牌號； d) 產品規格； e) 尺寸、不平度精度； f) 鋼卷內徑(鋼帶時)； g)基板鍍層重量； h)基板表面結構(熱鍍鋅基板時)； i) 涂層結構； j) 涂層表面狀態； k)面漆種類和顏色； l) 面漆功能； m)重量； n)包裝方式； o) 用途； p)其他特殊要求。 5.2 如訂貨合同中未注明尺寸和不平度精度，則供方按照普通精度供貨。 6尺寸、外形、重量 6.1 彩涂板的公稱尺寸范圍見表2。彩涂板的公稱厚度為彩涂前基板的公稱厚度，不包含涂層厚度。 表2 公稱尺寸范圍 單位為毫米 項目 公稱尺寸 公稱厚度 0.20～2.0 公稱寬度 600～1 600 鋼板公稱長度 1 000～6 000 鋼卷公稱內徑a 450、508或610 a如用戶對鋼卷內徑公差有要求，應由供需雙方協商確定。如未規定，由供方確定。 6.2 彩涂板的寬度、長度、外形及其基板厚度的允許偏差應符合相應基板標準的規定。 6.3彩涂板按實際重量交貨。 6.4如對尺寸、外形、重量及允許偏差有特殊要求應在訂貨時協商。 7技術要求 7.1普通涂層板 7.1.1彩涂板基板 7.1.1.1 彩涂板基板的力學性能、鍍層性能、鍍層重量、表面質量及鍍層表面結構應符合相應牌號基板標準的規定。經供需雙方協商同意，也可采用其他合適的基板標準。 7.1.1.2 除非另有規定，熱鍍鋅基板、熱鍍鋅鐵合金基板、熱鍍鋁鋅合金基板、熱鍍鋅鋁合金基板、熱鍍鋁硅合金基板和熱鍍鋅鋁鎂合金基板應進行平整(或光整)處理。 7.1.2正面涂層性能 7.1.2.1涂料種類 7.1.2.1.1 彩涂板的常用面漆種類見表1，如需其他種類的面漆應在訂貨時協商。 7.1.2.1.2底漆種類通常由供方確定，需方如有要求應在訂貨時協商。 7.1.2.2正面涂層厚度 7.1.2.2.1 正面涂層厚度為正面所有涂層厚度之和。 7.1.2.2.2正面涂層厚度應不小于20μm，如涂層厚度小于20 μm應在訂貨時協商。 7.1.2.2.3 正面涂層厚度為三個試樣平均值，單個試樣值應不小于最小規定值的90％。 7.1.2.3涂層色差 7.1.2.3.1 涂層與標準色板的色差ΔE值應不大于1.5，標準色板應在訂貨時由供需雙方確認。 7.1.2.3.2金屬顏料涂層的色差要求應在訂貨時協商。 7.1.2.3.3需方如對色差有特殊要求應在訂貨時協商。 7.1.2.4涂層光澤 7.1.2.4.1 涂層光澤度使用60°鏡面光澤，光澤分為A、B、C三個級別，各級別的光澤度應符合表3的規定。 表3光澤度級別要求 級別 光澤度 A ≤40 B >40～70 C >70 7.1.2.4.2每批產品光澤度差值不應大于10個光澤單位。 7.1.2.4.3 涂層光澤通常按A、B級光澤供貨，需C級光澤時應在合同中注明，如對光澤度有特殊要求應在訂貨時協商。 7.1.2.5 涂層硬度 7.1.2.5.1 涂層硬度通常用鉛筆硬度試驗進行評價，如需用耐磨性、耐劃傷等試驗作進一步評價應在訂貨時協商。 7.1.2.5.2各種面漆的鉛筆硬度應符合表4的規定，如對鉛筆硬度有特殊要求應在訂貨時協商。