ASTM-E23 2007

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E23-07 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials

Published By	Publication Date	Number of Pages
ASTM	2007	27

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Categories: 77.040.10 - Mechanical testing of metals, ASTM

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Description

ASTM E23-07

Historical Standard: Standard Test Methods for Notched Bar Impact Testing of Metallic Materials

ASTM E23

Scope

1.1 These test methods describe notched-bar impact testing of metallic materials by the Charpy (simple-beam) test and the Izod (cantilever-beam) test. They give the requirements for: test specimens, test procedures, test reports, test machines (see Annex A1) verifying Charpy impact machines (see Annex A2), optional test specimen configurations (see Annex A3), precracking Charpy V-notch specimens (see Annex A4), designation of test specimen orientation (see Annex A5), and determining the percent of shear fracture on the surface of broken impact specimens (see Annex A6). In addition, information is provided on the significance of notched-bar impact testing (see Appendix X1), methods of measuring the center of strike (see Appendix X2).

1.2 These test methods do not address the problems associated with impact testing at temperatures below -196 °C (-320 °F, 77 K).

1.3 The values stated in SI units are to be regarded as the standard. Inch-pound units are provided for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 5.

Keywords

charpy test; fracture appearance; Izod test; impact test; notched specimens; pendulum machine

ICS Code

ICS Number Code 77.040.10 (Mechanical testing of metals)

DOI: 10.1520/E0023-07

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use Precautions in Operation of Machine Apparatus
2	Test Specimens FIG. 1
3	FIG. 2 FIG. 3 FIG. 4
4	Procedure FIG. 5
6	Information Obtainable from Impact Tests FIG. 6
7	FIG. 7 FIG. 8
8	Report Precision and Bias FIG. 9 FIG. 10
9	Keywords A1. GENERAL REQUIREMENTS FOR IMPACT MACHINES A1.1 A1.2 A1.3 A1.4 A1.5 A1.6 A1.7 A1.8 A1.9
10	A1.10 Charpy Apparatus A1.11 Izod Apparatus FIG. A1.1
11	FIG. A1.2
12	A2. VERIFICATION OF PENDULUM IMPACT MACHINES A2.1 The verification of impact machines has two parts: FIG. A1.3
13	A2.2 Direct Verification of Parts Requiring Annual Inspec-tion A2.3 Direct Verification of Parts to be Verified at Least Once
14	FIG. A2.1
15	A2.4 Indirect Verification TABLE A2.1
16	A3. ADDITIONAL IMPACT TEST SPECIMEN CONFIGURATIONS A3.1 Sub-Size Specimen A3.2 Supplementary Specimens FIG. A3.1
17	FIG. A3.2 FIG. A3.3
18	A4. PRECRACKING CHARPY V-NOTCH IMPACT SPECIMENS A4.1 Scope A4.2 Significance and Use A4.3 Apparatus A4.4 Test Specimens FIG. A4.1
19	A4.5 Fatigue Precracking Procedure FIG. A4.2
20	A4.6 Calculation A4.7 Crack Length Measurement A4.8 Report A5. SPECIMEN ORIENTATION A5.1 Designation of Specimen Axis A5.2 Designation of Notch Orientation TABLE A4.1
21	A6. DETERMINATION OF THE PROPORTION OF SHEAR FRACTURE SURFACE A6.1 FIG. A5.3 FIG. A5.1 FIG. A5.2
22	TABLE A6.1
23	TABLE A6.2 FIG. A6.1
24	X1. NOTES ON SIGNIFICANCE OF NOTCHED-BAR IMPACT TESTING X1.1 Notch Behavior X1.2 Notch Effect TABLE X1.1
25	X1.3 Size Effect X1.4 Temperature Effect X1.5 Testing Machine X1.6 Velocity of Straining X1.7 Correlation with Service
26	X2. SUGGESTED METHODS OF MEASUREMENT X2.1 X3. INSTRUCTIONS FOR TESTING NON-STANDARD SPECIMENS X3.1 X3.2 X3.3 FIG. X2.1
27	REFERENCES

Additional information

Standard Title	E23-07 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
Published Code	ASTM
Publication Date	2007
Pages Count	27
ICS Codes	77.040.10 - Mechanical testing of metals