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QC/T 552-2025 English PDF

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Q: Should I purchase the latest version QC/T 552-2025?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version QC/T 552-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.

US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
QC/T 552-2025: Engines for automobile and motorcycle - Casting aluminium pistons
Status: Valid

QC/T 552: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
QC/T 552-2025	279	Add to Cart	3 days	Engines for automobile and motorcycle - Casting aluminium pistons	Valid
QC/T 552-1999	319	Add to Cart	3 days	Automobile, motorcycle engine - Technical conditions for the casting aluminium piston

Basic data

Standard ID: QC/T 552-2025 (QC/T552-2025)
Description (Translated English): Engines for automobile and motorcycle - Casting aluminium pistons
Sector / Industry: Automobile & Vehicle Industry Standard (Recommended)
Classification of Chinese Standard: T12
Classification of International Standard: 43.060
Word Count Estimation: 14,181
Date of Issue: 2025-05-09
Date of Implementation: 2025-11-01
Older Standard (superseded by this standard): QC/T 552-1999
Issuing agency(ies): Ministry of Industry and Information Technology of the People's Republic of China

QC/T 552-2025: Engines for automobile and motorcycle - Casting aluminium pistons

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT552-2025
Automobile Industry Standards of the People's Republic of China Replaces QC/T 552-1999 2025-05-09 Release 2025-11-01 Implementation CCS T 12 ICS 43.060 Ministry of Industry and Information Technology of the People's Republic of China issued Cast aluminum pistons for automobile and motorcycle engines Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Technical Requirements 1 4.1 General Principles 1 4.2 Materials 1 4.3 Casting surface defects 2 4.4 Processing surface defects 2 4.5 Surface structure quality 3 4.6 Dimensional tolerance 3 4.7 Geometric Tolerances 3 4.8 Piston mass 4 4.9 Grouping and marking of pistons 4 4.10 Piston cleanliness 5 5 Inspection methods 5 6 Inspection Rules 5 7 Marking, packaging, transportation and storage 5 7.1 Sign 5 7.2 Packaging 6 7.3 Transportation 6 7.4 Storage 6 7.5 Other 6 Table 1 Physical and mechanical properties of cast aluminum piston materials Table 2 Requirements for piston pin hole defects 2 Table 3 Requirements for defects of piston outer circle holes 2 Table 4 Piston skirt wall thickness difference 3 Table 5 Circumferential straightness requirements for the lower side of the first ring groove 3 Table 6 Requirements for perpendicularity between the major axis of the skirt ellipse and the axis of the pin hole 4 Table 7 Piston quality requirements 4 Table 8 Piston quality difference requirements for the same engine 4

Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces QC/T 552-1999 "Technical Specifications for Cast Aluminum Pistons for Automobile and Motorcycle Engines", except for the structural adjustments and editing In addition to the functional changes, the main technical changes are as follows. a) Added restrictions on the range of piston diameters (see Chapter 1); b) Added the reference to GB/T 1148 “Aluminium Pistons for Internal Combustion Engines” (see 4.1); c) The piston material requirements have been changed (see 4.2, 1.2 of the.1999 edition); d) The requirements for machined surface defects have been changed (see 4.4, 1.7 of the.1999 edition); e) Modified the roughness requirements of the piston skirt outer circle, ring groove bottom diameter surface, ring land outer circle surface, and piston top surface (see 4.5,.1999 edition) 1.8); f) The requirements for pin hole surface roughness have been changed, and the requirements for pin hole inner circle surface roughness Rz have been added (see 4.5.2,.1999 edition). 1.8.2); g) Added the combustion chamber surface roughness requirements (see 4.5.7); h) The circumferential waviness requirement for the lower side of the first annular groove has been modified (see 4.7.1, 1.10 of the.1999 edition); i) Added the piston pin hole roundness requirement and changed the cylindricity requirement (see 4.7.6,.1999 edition, subsection 1.16); j) The requirements for piston mass and mass difference have been changed (see 4.8, 1.21 of the.1999 edition); k) Added piston cleanliness requirements (see 4.10). Please note that some of the contents of this document may involve patents. The issuing organization of this standard does not bear the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Standardization of Automotive Products (SAC/TC 114). This document was drafted by. Binzhou Bohai Piston Co., Ltd., Huaminnan Piston Group Co., Ltd., Fujian Huawei Juquan Precision Technology Co., Ltd. Company, Hunan Jiangbin Machinery (Group) Co., Ltd., Ningbo Geely Luoyou Engine Parts Co., Ltd., Anhui Jialaiton Piston Auto Parts Co., Ltd., Anqing Yade Dibo Piston Co., Ltd., Anhui Hengtai Power Technology Co., Ltd., Jinhua Baolin Technology Co., Ltd., Longkou Dachuan Piston Co., Ltd., Qufu Jinhuang Piston Co., Ltd., FAW Jiefang Dalian Diesel Engine Co., Ltd., Shandong Binzhou Special Alloy Co., Ltd., Binzhou Zhengdao Machinery Manufacturing Co., Ltd., Binzhou Yatai Yade Power Parts Co., Ltd., Binzhou Mengweislinger Ring Co., Ltd. Co., Ltd., Binzhou Zhongshun Internal Combustion Engine Parts Co., Ltd. The main drafters of this document are. Jiang Dianchang, Liu Shiying, Wu Yimin, Lin Kaijing, Chen Xiuyu, Chen Weidong, Sun Fengjiao, Lin Tiejin, Wang Qiang, Tang Junlin, Chen Miaoyong, Cui Guangpeng, Sun Guochen, Guo Xiying, Liang Zhoucun, Su Daosheng, Zhang Guofeng, Meng Xiangkui, Dong Guoen, Shi Xiaoming, Zhang Xuelu, Song Shufeng, and Wang Jun. The previous versions of this document and the documents it replaces are as follows. --First published in 1985 as JB 3931-1985; --First revised to QC/T 552-1999 in March.1999; --This is the second revision. Cast aluminum pistons for automobile and motorcycle engines 1 Scope This document specifies the terms and definitions, names of parts, technical requirements, inspection methods, and testing methods of cast aluminum pistons for automobile and motorcycle engines. Rules, marking, packaging, transportation and storage. This document applies to the manufacture of cast aluminum pistons for automobile and motorcycle engines with a cylinder diameter less than or equal to 160 mm. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. The version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 1031 Geometrical Product Specification (GPS) - Surface structure profile method - Surface roughness parameters and their values GB/T 1148 Aluminum pistons for internal combustion engines GB/T 2828.1 Sampling procedures for inspection by attributes Part 1.Sampling plans for batch inspection based on acceptance quality limit (AQL) GB/T 10610 Geometrical Product Specification (GPS) - Rules and methods for evaluating surface structure using the surface structure profile method JB/T 14615 Cleanliness limits and determination methods for piston moving components of internal combustion engines QC/T 283 Automobile engine piston with wear-resistant ring QC/T 553 Metallographic Examination of Cast Aluminum Pistons for Automobile and Motorcycle Engines 3 Terms and Definitions The terms and definitions defined in GB/T 1148 apply to this document. 4 Technical Requirements 4.1 General 4.1.1 Cast aluminum pistons (hereinafter referred to as "pistons") shall be manufactured in accordance with product drawings and technical documents approved through prescribed procedures. 4.1.2 In addition to meeting the following technical requirements, other technical requirements of the piston shall comply with the provisions of GB/T 1148. 4.1.3 The technical requirements for cast aluminum pistons with inlaid wear-resistant rings shall comply with QC/T 283. 4.2 Materials 4.2.1 Material composition The piston body material is cast aluminum-silicon alloy, and the material grade or composition should be indicated in the product drawing. 4.2.2 Mechanical properties and volume stability 4.2.2.1 The piston shall be heat treated, and its mechanical properties and volume stability (residual expansion of the piston diameter D) shall comply with the requirements of Table 1. 4.2.2.2 The hardness difference of the same piston should be less than or equal to 10 Brinell hardness units. The hardness difference of the same batch of pistons should be less than or equal to 30 Brinell hardness units. Unit of hardness. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of QC/T 552-2025_English be delivered?

Answer: Upon your order, we will start to translate QC/T 552-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of QC/T 552-2025_English with my colleagues?

Answer: Yes. The purchased PDF of QC/T 552-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version QC/T 552-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version QC/T 552-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.