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## AS 1391:2020

[Current]### Metallic materials — Tensile testing — Method of test at room temperature

This Standard adopts ISO 6892-1:2019 which specifies the method for tensile testing of metallic materials and define the mechanical properties which can be determined at room temperature.

Published: 26/06/2020

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Table of contents

Cited references

Content history

Table of contents

Header

About this publication

Preface

Foreword

Introduction

1 Scope

2 Normative references

3 Terms and definitions

3.7

3.9

4 Symbols

5 Principle

6 Test pieces

6.1 Shape and dimensions

6.1.1 General

6.1.2 Machined test pieces

6.1.3 Unmachined test pieces

6.2 Types

6.3 Preparation of test pieces

7 Determination of original cross-sectional area

8 Original gauge length and extensometer gauge length

8.1 Choice of the original gauge length

8.2 Marking the original gauge length

8.3 Choice of the extensometer gauge length

9 Accuracy of testing apparatus

10 Conditions of testing

10.1 Setting the force zero point

10.2 Method of gripping

10.3 Testing rates

10.3.1 General information regarding testing rates

10.3.2 Testing rate based on strain rate (method A)

10.3.2.1 General

10.3.2.2 Strain rate for the determination of the upper yield strength, ReH, or proof strength properties, Rp, and Rt

10.3.2.3 Strain rate for the determination of the lower yield strength, ReL, and percentage yield point extension, Ae

10.3.2.4 Strain rate for the determination of the tensile strength, Rm, percentage elongation after fracture, A, percentage total extension at the maximum force, Agt, percentage plastic extension at maximum force, Ag, and percentage reduction area, Z

10.3.3 Testing rate based on stress rate (method B)

10.3.3.1 General

10.3.3.2 Yield and proof strengths

10.3.3.2.1 Upper yield strength, ReH

10.3.3.2.2 Lower yield strength, ReL

10.3.3.2.3 Upper and lower yield strengths, ReH and ReL

10.3.3.2.4 Proof strength (plastic extension) and proof strength (total extension), Rp and Rt

10.3.3.2.5 Rate of separation

10.3.3.3 Tensile strength, Rm, percentage elongation after fracture, A, percentage total extension at the maximum force, Agt, percentage plastic extension at maximum force, Ag, and percentage reduction area, Z

10.3.4 Report of the chosen testing conditions

11 Determination of the upper yield strength

12 Determination of the lower yield strength

13 Determination of proof strength, plastic extension

13.1

13.2

14 Determination of proof strength, total extension

14.1

14.2

15 Method of verification of permanent set strength

16 Determination of the percentage yield point extension

17 Determination of the percentage plastic extension at maximum force

18 Determination of the percentage total extension at maximum force

19 Determination of the percentage total extension at fracture

20 Determination of percentage elongation after fracture

20.1

20.2

20.3

21 Determination of percentage reduction of area

22 Test report

23 Measurement uncertainty

23.1 General

23.2 Test conditions

23.3 Test results

Annex A

A.1 General

A.2 Tensile testing machine

A.2.1 Design

A.2.2 Data sampling frequency

A.3 Determination of the mechanical properties

A.3.1 General

A.3.2 Upper yield strength

A.3.3 Proof strength at plastic extension and proof strength at total extension

A.3.4 Percentage total extension at maximum force

A.3.5 Percentage plastic extension at maximum force

A.3.6 Percentage elongation at fracture

A.3.6.1

A.3.6.2

A.3.6.3

A.3.7 Measurement of the slope of the curve in the elastic range

A.4 Validation of the software for determination of the tensile properties

A.5 Computer compatible representation of standards

Annex B

B.1 General

B.2 Shape of the test piece

B.3 Dimensions of the test piece

B.4 Preparation of test pieces

B.5 Determination of the original cross-sectional area

Annex C

C.1 Shape of the test piece

C.2 Dimensions of the test piece

C.3 Preparation of test pieces

C.4 Determination of the original cross-sectional area

Annex D

D.1 Shape of the test piece

D.2 Dimensions of the test piece

D.2.1 Parallel length of machined test piece

D.2.2 Length of unmachined test piece

D.2.3 Original gauge length

D.2.3.1 Proportional test pieces

D.2.3.2 Non-proportional test pieces

D.3 Preparation of test pieces

D.3.1 General

D.3.2 Machining tolerances

D.3.3 Tolerances on shape

D.4 Determination of the cross-sectional area

Annex E

E.1 Shape of the test piece

E.2 Dimensions of the test piece

E.2.1 Length of tube

E.2.2 Longitudinal or transverse strip

E.2.3 Circular cross-section test piece machined in tube wall

E.3 Determination of the original cross-sectional area

Annex F

Annex G

G.1 Introduction

G.2 General

G.3 Testing equipment

G.3.1 Accuracy of the testing equipment

G.3.1.1 Force-measuring device

G.3.1.2 Extensometer system

G.3.1.3 Resolution of the testing system

G.3.1.4 Measuring devices for the determination of the relevant test piece dimensions

G.3.2 Method of gripping and alignment

G.4 Test pieces

G.4.1 General

G.4.2 Determination of original cross-sectional area

G.5 Procedure

G.5.1 General

G.5.2 Setting the force zero point

G.5.3 Testing conditions

G.5.3.1 Testing rate

G.5.3.2 Data sampling frequency

G.5.3.3 Testing procedure

G.6 Evaluation

G.6.1 Averaging the extensometry signals

G.6.2 Calculation of the modulus of elasticity

G.7 Measurement uncertainty

G.7.1 General

G.7.2 Estimation of the measurement uncertainty according to CWA 15261-2

G.7.2.1 General

G.7.2.2 Example for the calculation of the measurement uncertainty

G.7.3 Estimation of the measurement uncertainty according to Annex K

G.7.4 Proficiency test

G.8 Test report

G.9 Additional considerations

G.10 Other methods for Determining Modulus

G.11 Uncertainty and Reproducibility

Annex H

Annex I

I.1

I.2

Annex J

Annex K

K.1 General

K.2 Estimation of uncertainty

K.2.1 General

K.2.2 Type A — By repeated measurement

K.2.3 Type B — From some other source, e.g. calibration certificates or tolerances

K.3 Equipment parameters effect on the uncertainty of test results

K.4 Parameters depending on the material and/or the test procedure

Annex L

Bibliography

Cited references in this standard

[Current]

Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-measuring system

[Current]

Metallic materials — Calibration of extensometer systems used in uniaxial testing — Technical Corrigendum 1

Content history

[Current]

[Superseded]

[Superseded]

AS 1391-2007 Rec:2017

DR AS 1391:2020