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GB/T 30068-2025: Cold rolled steel sheet and strip for appliances
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 30068-2025	English	279	Add to Cart	3 days [Need to translate]	Cold rolled steel sheet and strip for appliances
GB/T 30068-2013	English	299	Add to Cart	3 days [Need to translate]	Cold rolled steel sheets and strips for appliance

GB/T 30068-2025: Cold rolled steel sheet and strip for appliances

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ICS 77.140.50 CCSH46 National Standards of the People's Republic of China Replaces GB/T 30068-2013 Cold-rolled steel sheets and strips for household appliances Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 30068-2013 "Cold-rolled steel sheets and strips for household appliances". Compared with GB/T 30068-2013, the main differences are in the structural design. Aside from integration and editorial changes, the main technical changes are as follows. a) The scope of this document has been changed, expanding the lower limit of thickness to 0.25 mm and the upper limit to 3.00 mm (see Chapter 1,.2013). Chapter 1 of the.2018 edition); b) Added grades and properties of high-strength structural steel (see 4.1.1); c) Added classifications and codes for ultra-smooth surface structures of steel plates and strips (see 4.1.3); d) Added steel smelting methods (see 6.1); e) Added specifications for the mechanical properties of grade JD0 (see 7.2.2); f) The permissible length for defective steel strip delivery has been changed to 6% of the total length of each coil (see 7.4.3, 7.5.3 of the.2013 edition); g) The characteristics of the surface quality of steel plates and strips have been changed (see 7.4.2, 7.5.2 in the.2013 edition); h) The target value for the average roughness of ultra-smooth surface structures of steel plates and strips has been increased (see 7.5); i) Added specifications for tensile strain marks in grade JD0 (see 7.6); j) The inspection items for steel plates and strips have been changed (see 8.2, 8.3 in the.2013 edition); k) The inspection rules for steel plates and strips have been changed (see Chapter 9, Chapter 9 of the.2013 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Ansteel Co., Ltd., Metallurgical Industry Information and Standardization Research Institute, Hunan Valin Lianyuan Iron & Steel Co., Ltd., and Anyang... Iron & Steel Group Co., Ltd., Benxi Steel POSCO Cold Rolled Sheet Co., Ltd., Beijing University of Science and Technology, Tianjin Yuantai Derun Steel Pipe Manufacturing Group Limited Liability Company. The main drafters of this document are. Su Haolu, Huang Qiuju, Sun Menghan, Zhao Dingzang, Liu Peng, Yu Wenshuang, Zhao Zhengzhi, Li Qian, Liu Kaisong, and Xin Lifeng. Park Ji-min, Li Xiaoshao, Qi Xinjun, Zhou Zhongqi, Wang Yue, Tian Zijian, Fu Wei, Zhang Weixu. The release history of this document and the document it replaces is as follows. ---First published in.2013 as GB/T 30068-2013; ---This is the first revision. Cold-rolled steel sheets and strips for household appliances 1.Scope This document specifies the classification and grade designation methods, ordering details, manufacturing processes, technical requirements, and testing procedures for cold-rolled steel sheets and strips used in household appliances. Methods, inspection rules, packaging, marking and quality certificates. This document applies to cold-rolled steel sheets and strips for household appliances with a thickness of 0.25mm to 3.00mm (hereinafter referred to as "steel sheets and strips").

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 222 Permissible deviations in the chemical composition of finished steel GB/T 223 (all parts) Chemical Analysis Methods for Iron and Steel and Alloys GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test method GB/T 232 Metallic Materials - Bending Test Method GB/T 247 General provisions for packaging, marking and quality certificates of steel plates and strips GB/T 708 Dimensions, shape, weight and permissible deviations of cold-rolled steel sheets and strips GB/T 2523 Methods for measuring surface roughness, peak count and waviness of cold-rolled sheet and strip metal GB/T 2975 Sampling Location and Specimen Preparation for Mechanical Property Testing of Steel and Steel Products GB/T 4336 Determination of Multi-Element Content in Carbon Steel and Medium-Low Alloy Steel by Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1.Test method GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values GB/T 17505 General technical requirements for delivery of steel and steel products GB/T 20066 Sampling and Sample Preparation Methods for the Determination of Chemical Composition of Steel and Iron GB/T 20123 Determination of Total Carbon and Sulfur Content in Iron and Steel - Infrared Absorption Method After Combustion in a High-Frequency Induction Furnace (Conventional Method) GB/T 20125 Determination of Multi-Element Content in Low-Alloy Steels by Inductively Coupled Plasma Atomic Emission Spectrometry 3.Terms and Definitions This document does not contain any terms or definitions that need to be defined. 4.Classification and Brand Designation Methods 4.1 Classification 4.1.1 The classification of steel plate and steel strip grades according to steel characteristics is shown in Table 1. Table 1 Classification of Steel Grades and Properties Steel grade characteristics JD0 High-strength structural use JD1 structure JD2 is generally used JD3 for stamping JD4 for deep drawing 4.1.2 Steel plates and strips are classified according to surface quality as shown in Table 2. Table 2 Surface Quality Classification Level code Higher-grade surface FB Advanced Surface FC Super Advanced Surface FD 4.1.3 Steel plates and strips are classified according to their surface structure, as shown in Table 3. Table 3 Surface Structure Classification Surface structure code Super Smooth b Glossy surface B Pockmarked D 4.1.4 Steel plates and strips are classified according to edge condition, as shown in Table 4. Table 4 Edge State Classification Edge state code Edge trimming EC Uncut EM 4.1.5 Steel plates and strips are classified according to their unevenness, as shown in Table 5. Table 5 Roughness Classification Unevenness code Higher level of unevenness accuracy PF.B Advanced unevenness accuracy PF.C 4.2 Designation Method The grade designations for steel plates and strips consist of the initials "JD" (the pinyin for "home appliances") and a numerical serial number. See the appendix for the uses of each grade. Record A. Example. JD1, where. JD---The first letters of the Chinese pinyin for home appliances; 1 --- Numerical serial number. 5.Order details 5.1 A contract or order placed in accordance with this document shall include at least the following. a) Product Name (Steel Plate and Steel Strip); b) This document number; c) Brand; d) Specifications, dimensions, and shape accuracy; e) Inner diameter of the steel coil (508mm or 610mm); f) Surface quality level; g) Surface structure; h) Edge state (cut edge or not cut edge); i) Type of oiling (no oiling, light oiling, medium oiling, or heavy oiling); j) Packaging method; k) Weight; l) Purpose; m) Other special requirements. 5.2 If the purchase order does not specify dimensions, flatness accuracy, surface quality grade, surface texture, edge condition, and packaging method, etc. The information provided in this document indicates that the products are made of steel plates or strips with standard dimensional accuracy, high flatness accuracy, high surface quality, roughness, beveled edges, and light oiling. The goods shall be supplied and packaged according to the packaging method provided by the supplier. Unless otherwise specified, the inner diameter of the steel coils shall be supplied as 610mm. 6.Manufacturing process 6.1 Smelting Method The steel is smelted in a converter or electric furnace. Unless otherwise specified by the buyer in the contract, the smelting method shall be selected by the supplier. 6.2 Delivery Status 6.2.1 Steel plates and strips shall be delivered in a flat, annealed condition. 6.2.2 Steel plates and strips are usually supplied with an oil coating. The oil film should be removable by alkaline aqueous solutions or common solvents, and should withstand normal packaging, transportation, and other conditions. Under loading, unloading, and storage conditions, lightly oiled steel plates and strips will not rust within 3 months from the date of manufacture; medium-oiled and heavily oiled steel plates and strips will not rust. The steel strip will not rust for 6 months from the date of manufacture. See Appendix B for the amount of oil to apply for each type of oil. Note 1.For products requested by the buyer to be unoiled or coated with DOS oil, rust may occur. Furthermore, during transportation, loading and unloading, storage, and use, surface corrosion is likely to occur. Minor scratches. Note 2.The date of issuance in the product inspection document is usually defined as the date the product was completed. ...