GB/T 26649-2025Magnesium alloy castings for automobile wheels (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This Document replaced GB/T 26649-2011 Magnesium Alloy Castings for Automobile Wheels.

Compared with GB/T 26649-2011, the major technical changes of this Document are as follows besides the structural adjustments and editorial modifications.

a) Change the scope (see Clause 1 of this Edition; Clause 1 of the 2011 Edition);

b) Delete the terms and definitions of magnesium alloy castings for automobile wheels (see 3.1.1 of the 2011 Edition);

c) Change the chemical composition (see 4.1 of this Edition; 4.1.1 of the 2011 Edition);

d) Change the mechanical property requirements (see 4.2 of this Edition; 4.1.2 of the 2011 Edition);

e) Change the dimensional and geometric tolerance requirements (see 4.3 of this Edition; 4.2 of the 2011 Edition);

f) Change the internal quality requirements (see 4.4 of this Edition; 4.4 of the 2011 Edition);

g) Change the surface quality requirements (see 4.5 of this Edition; 4.3 of the 2011 Edition);

h) Change the test methods on chemical composition (see 5.1 of this Edition; 5.1.1 of the 2011 Edition);

i) Add test methods on dimensional and geometric tolerance (see 5.3 of this Edition);

j) Change test methods on internal quality (see 5.4 of this Edition; 5.3 of the 2011 Edition);

k) Change batching (see 6.1 of this Edition; 6.2 of the 2011 Edition);

l) Change inspection items (see 6.2 of this Edition; 6.1.1 of the 2011 Edition);

m) Add sampling provisions (see 6.3 of this Edition);

n) Change result judgment (see 6.4 of this Edition; 6.1.2 of the 2011 Edition);

o) Changed marking, quality certificate, packaging, transportation, and storage requirements (see Clause 7 of this Edition; Clause 7 of the 2011 Edition).

Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents.

Magnesium Alloy Castings for Automobile Wheels

1 Scope

This Document specifies the technical requirements, test methods, inspection rules and marking, quality certificate, packaging, transportation, and storage of magnesium alloy castings for automobile wheels.

This Document applies to the production and inspection of magnesium alloy castings for automobile wheels (hereinafter referred to as castings).

2 Normative References

GB/T 228.1

GB/T 231.1

GB/T 2933

GB/T 5611

GB/T 6414-2017

GB/T 13748.21

21 Determination of elements by photoelectric direct reading atomic emission

spectrometry GB/T 39638 X-ray digital radiographic testing for casting

3 Terms and Definitions

For the purposes of this Document, the terms and definitions given in GB/T 2933 and GB/T 5611 apply.

4 Technical Requirements

5 Test Methods

6 Inspection Rules