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This standard is drafted in accordance with the rules given in the GB/T 1.1-2009.
This standard replaces GB/T 3191-2010 Aluminium and Aluminium Alloys Extruded Bars, Rods. In addition to a number of editorial changes, the following technical deviations have been made with respect to the GB/T 3191-2010 (the previous edition):
— deletion of the normative reference GB/T 228 (see Clause 2 and 4.3 of Edition 2010);
— addition of the normative reference GB/T 8170 (see Clause 2 and 4.1.3);
— modification of the supplied diameter specification of round rods from "5 mm to 600 mm" to "5 mm to 350 mm” (see 3.1.1; 3.1.1 of Edition 2010);
— modification of the requirements for the average magnesium content of 5XXX alloys in Types I and II designations, namely the average magnesium content of 5XXX alloys in Type II designations is changed from “≥3%" to "≥4%”, and the average magnesium content of 5XXX alloys in Type I designations is changed from “<3%" to "<4%” (see 3.1.1; 3.1.1 of Edition 2010);
— addition of the rod designations 2219, 2618, 6101B and 6110A (see 3.1.1);
— addition of the rod designations 1050A, 2014 and 2014A in O state (see 3.1.1);
— addition of the rod designation 2024 in T8, T8510 and T8511 states (see 3.1.1);
— addition of the rod designation 7075 in T1, T73, T73510 and T73511 states (see 3.1.1);
— modification of the requirements for labels and examples in the product classification (see 3.1.2; 3.1.2 of Edition 2010);
— modification of the requirements of "supply as class A when the dimension deviation is not specified" for the section dimension (see 3.3.1; 3.3.1 of Edition 2010);
— modification of the requirements of "fillet radius" to “chamfered radius” in the dimension deviation (see 3.3.2; 3.3.2 of Edition 2010);
— modification of the requirements of bending in the dimension deviation (see 3.3.3; 3.3.2 of Edition 2010);
— addition of the mechanical properties of rods and bars of designations 4A11 and 4032, and of diameters or thicknesses not greater than 100 mm (see 3.4.1);
— modification of the mechanical properties of rods and bars of designations 3003, 3103, 5154A, 5454 and 6101A (see 3.4.1; 3.4.1 of Edition 2010);
— modification of the mechanical properties of rods and bars of designation 2A12 in T1 and T4 states, and of diameters or thickenings greater than 22 mm to 150 mm (see 3.4.1; 3.4.1 of Edition 2010);
— modification of the mechanical properties of rods and bars of designation 5052 in H112 state (see 3.4.1; 3.4.1 of Edition 2010);
— modification of the mechanical properties of rods and bars of designations 4A11 and 4032, and of diameters or thickenings greater than 100 mm to 200 mm (see 3.4.1; 3.4.1 of Edition 2010);
— modification of the mechanical properties of rods and bars of designation 7075 in T6, T6510 and T6511 states, and of diameters or thickenings greater than 100 mm to 200 mm (see 3.4.1; 3.4.1 of Edition 2010);
— addition of the Brinell hardness reference values for products of partial designations (see 3.5);
— modification of the requirements of low magnification structure of rods and bars (see 3.8; 3.5 of Edition 2010);
— modification of the requirements of microstructure of rods and bars (see 3.9; 3.6 of Edition 2010);
— modification of the requirements of appearance quality of rods and bars (see 3.10; 3.8 of Edition 2010);
— modification of the analysis method of chemical composition in the test method (see 4.1; 4.1 of Edition 2010);
— modification of the measurement method of dimensional deviation in the test method (see 4.2; 4.2 of Edition 2010);
— modification of the test methods of mechanical properties in the test method (see 4.3; 4.3 of Edition 2010);
— modification of the batching in the inspection rules (see 4.3; 4.3 of Edition 2010);
— addition of the requirements of weighing in the inspection rules (see 5.3);
— modification of the requirements of inspection items in the inspection rules (see 5.4; 5.3 of Edition 2010);
— modification of the requirements for the inspection result judgment of low magnification structure in the inspection result judgment (see 5.6.7; 5.5.6 of Edition 2010);
— modification of the contents of order (or contract) (see Clause 7; Clause 7 of Edition 2010);
This standard was proposed by China Nonferrous Metals Industry Association.
This standard is under the jurisdiction of National Technical Committee 243 on Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
The previous editions of the standards replaced by this standard are as follows:
— GB/T 3191-1982, GB/T 3191-1998, GB/T 3191-2010;
— GB/T 3192-1982;
— GB/T 10572-1989.
Extrusion Rods and Bars of Aluminium and Aluminium Alloys
1 Scope
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificates and order (contract) contents of the extrusion rods and bars of aluminium and aluminium alloys.
This standard is applicable to extruded round rods, square rods and hexagonal rods of aluminium and aluminium alloys (hereinafter referred to as "rods and bars").
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 2039 Metallic Materials — Uniaxial Creep Testing Method in Tension
GB/T 3190 Wrought Aluminium and Aluminium Alloy — Chemical composition
GB/T 3199 Wrought Aluminium and Aluminium Alloy Products — Packing Marking Transporting and Storing
GB/T 3246.1 Inspection Method for Structure of Wrought Aluminum and Aluminum Alloy Products — Part 1: Inspection Method for Microstructure
GB/T 3246.2 Inspection Method for Structure of Wrought Aluminum and Aluminum Alloy Products — Part 2: Inspection Method for Macrostructure
GB/T 6519 Ultrasonic Inspection of Wrought Aluminium and Magnesium Alloy Products
GB/T 7999 Optical Emission Spectrometric Analysis Method of Aluminum and Aluminum Alloys
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 16475-2008 Temper Designation System for Wrought Aluminium and Aluminium Alloy
GB/T 16865 Test Pieces and Method for Tensile Test for Wrought Aluminium and Magnesium Alloys Products
GB/T 17432 Methods of Sampling for Analyzing the Chemical Composition of Wrought Aluminum and Aluminum Alloy
GB/T 20975 (all parts) Methods for chemical analysis of aluminium and aluminium alloys
3 Requirements
3.1 Product classification
3.1.1 Designation, supply states, dimension and specification
The designation, supply state, dimension and specification of rods and bars shall meet those specified in Table 1. Rods and bars of other designations, supply states, dimensions and specifications, if necessary, shall be determined by the supplier and the purchaser through negotiation and be indicated in the order (contract).
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Table 1 Designations, supply states, dimensions and specifications
Designation Supply statec Dimensions/specifications
mm
Type Ia Type IIb Diameter of round rods Thickness of square or hexagonal rods Length
a Type I is 1XXX series, 3XXX series, 4XXX series, 6XXX and 8XXX series alloys, and 5XXX series alloy rods with the average magnesium content < 4%.
b Type II is 2XXX series and 7XXX series alloys, and 5XXX series alloy rods with the average magnesium content ≥ 4%.
c According to requirements of GB/T 16475-2008, the extrusion state of heat-treatable alloys is modified from H112 state to T1 state.
3.1.2 Labels and examples
3.1.2 The product labels are marked in the order of product name, standard number, designation, state, dimension and specification. Examples of label are as follows:
Example 1:
Extrusion round rod with designation 7075, in T6 state, and of a diameter of 100.00 mm and a length of 4 000 mm, marked as:
Round rod GB/T 3191-7075T6-φ100×4 000
Example 2:
Extrusion round rod with designation 7075, in T6 state, and of a diameter of 50.00 mm and a non-specified length, marked as:
Round rod GB/T 3191-7075T6-φ50
Example 3:
Extrusion square rod with designation 7075, in T6 state, and of a diameter of 100.00 mm and a length of 4 000 mm, marked as:
Square rod GB/T 3191-7075T6-100×4 000
Example 4:
Extrusion hexagonal rod with designation 7075, in T6 state, and of a diameter of 80.00 mm and a length of 4 000 mm, marked as:
Hexagonal rod GB/T 3191-7075T6-80×4 000
Example 5:
Extrusion high-strength hexagonal rod with designation 7075, in T6 state, and of a diameter of 80.00 mm and a length of 4 000 mm, marked as:
High-strength hexagonal rod GB/T 3191-7075T6-80×4 000
3.2 Chemical composition
Chemical composition of rods and bars shall comply with the requirements of GB/T 3190.
3.3 Dimensional deviation
3.3.1 Section dimension
The allowable deviation of section dimension of rods and bars shall comply with the requirements of Class D in Table 2. Other classes or special requirements shall be indicated in the order (or contract).
Foreword II
1 Scope
2 Normative References
3 Requirements
4 Test Methods
5 Inspection Rules
6 Marking, Packaging, Transportation, Storage and Quality Certificate
7 Order (or Contract) Content
Bibliography
