ISO 6892-1:2019
Metallic materials — Tensile testing — Part 1: Method of test at room temperature
This document specifies the method for tensile testing of metallic materials and defines the mechanical properties which can be determined at room temperature.
NOTE Annex A contains further recommendations for computer controlled testing machines.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
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)
10.3.3 Testing rate based on stress rate (method B)
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
14 Determination of proof strength, total extension
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
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 (informative) Recommendations concerning the use of computer-controlled tensile testing machines
Annex B (normative) Types of test pieces to be used for thin products: sheets, strips, and flats between 0,1 mm and 3 mm thick
Annex C (normative) Types of test pieces to be used for wire, bars, and sections with a diameter or thickness of less than 4 mm
Annex D (normative) Types of test pieces to be used for sheets and flats of thickness equal to or greater than 3 mm and wire, bars, and sections of diameter or thickness equal to or greater than 4 mm
Annex E (normative) Types of test pieces to be used for tubes
Annex F (informative) Estimation of the crosshead separation rate in consideration of the stiffness (or compliance) of the testing equipment
Annex G (normative) Determination of the modulus of elasticity of metallic materials using a uniaxial tensile test
Annex H (informative) Measuring the percentage elongation after fracture if the specified value is less than 5 %
Annex I (informative) Measurement of percentage elongation after fracture based on subdivision of the original gauge length
Annex J (informative) Determination of the percentage plastic elongation without necking, Awn, for long products such as bars, wire, and rods
Annex K (informative) Estimation of the uncertainty of measurement
Annex L (informative) Precision of tensile testing — Results from interlaboratory programmes
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
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)
10.3.3 Testing rate based on stress rate (method B)
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
14 Determination of proof strength, total extension
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
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 (informative) Recommendations concerning the use of computer-controlled tensile testing machines
Annex B (normative) Types of test pieces to be used for thin products: sheets, strips, and flats between 0,1 mm and 3 mm thick
Annex C (normative) Types of test pieces to be used for wire, bars, and sections with a diameter or thickness of less than 4 mm
Annex D (normative) Types of test pieces to be used for sheets and flats of thickness equal to or greater than 3 mm and wire, bars, and sections of diameter or thickness equal to or greater than 4 mm
Annex E (normative) Types of test pieces to be used for tubes
Annex F (informative) Estimation of the crosshead separation rate in consideration of the stiffness (or compliance) of the testing equipment
Annex G (normative) Determination of the modulus of elasticity of metallic materials using a uniaxial tensile test
Annex H (informative) Measuring the percentage elongation after fracture if the specified value is less than 5 %
Annex I (informative) Measurement of percentage elongation after fracture based on subdivision of the original gauge length
Annex J (informative) Determination of the percentage plastic elongation without necking, Awn, for long products such as bars, wire, and rods
Annex K (informative) Estimation of the uncertainty of measurement
Annex L (informative) Precision of tensile testing — Results from interlaboratory programmes
Bibliography