GB/T 3251-2023Compression test method for aluminium and aluminium alloy products (English PDF)

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 3251-2006 "Compression Test Methods for Aluminum and Aluminum Alloy Pipes". Compared with GB/T 3251-2006, except for the In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Added test conditions (see Chapter 5);

b) Added testing machine requirements (see 6.1);

c) Added backing plate and extensometer (see 6.2 and 6.3);

d) The sample type and sample preparation have been changed (see 7.1, 7.2, Chapter 4 of the 2006 edition);

e) Added test preparation (see Chapter 8);

f) The test procedures have been changed (see Chapter 9, Chapter 5 of the 2006 edition);

g) Added the actual compression force of the rectangular specimen in the test results, specified non-proportional compressive strength, compressive strength, compressive elastic modulus, upper compression Yield force, compression ratio, energy absorption, compression deformation of specified force value (see 10.2, 10.3, 10.4, 10.5, 10.6, 10.7, 10.8, 10.9);

h) Added test report (see Chapter 11).

1 Scope

This document describes compression testing methods for aluminum and aluminum alloy products.

This document is applicable to the determination of the compression properties of aluminum and aluminum alloy products such as plates, pipes, rods, profiles, and forgings.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only 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 8170 Numerical rounding rules and expression and determination of limit values

GB/T 10623 Terminology for mechanical properties testing of metal materials

GB/T 12160-2019 Calibration of extensometer systems for uniaxial testing of metallic materials

JJG 139 Tensile, Compression and Universal Testing Machine

JJG 475 electronic universal testing machine

JJG 762 extensometer

JJG 1063 Electro-hydraulic servo universal testing machine

3 Terms and definitions

The terms and definitions defined in GB/T 10623 apply to this document.

4 Method overview

Apply a unidirectional compressive force to the specimen in the axial direction. When the specimen is compressed to the specified deformation amount or reaches the specified load or the maximum force value occurs, the test specimen is measured.

Actual compressive force, specified non-proportional compressive strength, compressive strength, compressive elastic modulus, upper compressive yield force, compressibility, energy absorption of the rectangular specimen Compression performance indicators such as compression deformation amount and specified force value are used to evaluate the material's ability to resist compression deformation.

5 Test conditions

The test temperature is 10°C~35°C.

6 Instruments and Equipment