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GB/T 12778-2008: Determination of Charpy impact fracture surface for metallic materials
Status: Obsolete GB/T 12778: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12778-2008 | English | 479 |
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Determination of Charpy impact fracture surface for metallic materials
| Obsolete |
GB/T 12778-2008
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| GB/T 12778-1991 | English | 319 |
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Metallic materials--Determination of Charpy impact fracture surface
| Obsolete |
GB/T 12778-1991
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PDF similar to GB/T 12778-2008
Basic data | Standard ID | GB/T 12778-2008 (GB/T12778-2008) | | Description (Translated English) | Determination of Charpy impact fracture surface for metallic materials | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H22 | | Classification of International Standard | 77.040.10 | | Word Count Estimation | 12,150 | | Date of Issue | 2008-02-01 | | Date of Implementation | 2008-07-01 | | Older Standard (superseded by this standard) | GB/T 12778-1991 | | Quoted Standard | GB/T 229; GB/T 3808; GB/T 8170; GB/T 19748 | | Adopted Standard | ASTM E23-2002, MOD | | Regulation (derived from) | National Standard Approval Announcement 2008 No.2 (Total No.115) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the sample rate of the fracture and the determination of the fiber surface side of the metal material expansion value Charpy impact. This standard applies to the determination of metallic materials-Charpy impact test specimens fracture, other types of impact specimens fracture, can also refer to the use. | GB/T 12778-2008: Determination of Charpy impact fracture surface for metallic materials---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of Charpy impact fracture surface for metallic materials
ICS 77.040.10
H22
National Standards of People's Republic of China
Replacing GB/T 12778-1991
Determination of fracture metal Charpy impact
Posted 2008-02-01
2008-07-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts ASTME23-02 "metallic material notch impact test specimens Standard Method" on page 9 and Appendix A6 section
Relevant content.
This standard replaces GB/T 12778-1991 "metal Charpy impact fracture determination." This standard and GB/T 12778-1991 phase
Than the main changes are as follows.
--- Chapters on the structure has been adjusted;
--- Added "test equipment and instruments" chapter;
--- Delete the original standard "use of low magnification microscopes and other optical instruments to measure the crystalline area" section;
--- Added Appendix A "section toughness measured rate."
Appendix A of this standard is the data appendix.
The standard proposed by China Shipbuilding Industry Corporation.
This standard by the National Standardization Technical Committee Marine boat marine materials application technology at the Technical Committee.
This standard was drafted. China Shipbuilding Industry Corporation seventh twenty-five Research Institute, Beijing University of Aeronautics and Astronautics, Wuchang Shipyard, Jiangnan made
Shipyard, Dalian Shipyard.
The main drafters of this standard. Bai Jie, Tang Zhenting, Yehong De, Yuan Dehui, Shen right An Lijun, Chan base, Zhangxin Yao.
This standard replaces the standards previously issued as follows.
--- GB/T 12778-1991.
Determination of fracture metal Charpy impact
1 Scope
This standard specifies the method to determine metal material Summer impact specimens fracture fiber fracture rate and lateral expansion values.
This standard applies to the determination of metallic materials Charpy fracture, other types of impact specimens fracture, can also refer to use.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 229 metal Charpy pendulum impact test method (GB/T 229-2007, ISO 148-1.2006, MOD)
GB/T 3808 pendulum impact testing machines (GB/T 3808-2002, ISO 148-2.1998, MOD)
GB/T 8170 numerical rounding rules
Test equipment test method (GB/T 19748-2005 GB/T 19748 Steel Charpy V-notch pendulum impact,
ISO 14556.2000, MOD)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Fracture surface and near-surface region of the rear impact test specimens punch.
3.2
Fracture surfaces generally metallic luster, no plastic deformation of the flush section.
3.3
Percentage off the mouth of the crystalline area and the total area of \u200b\u200bthe original cross-sectional area at the notch.
3.4
Fracture surfaces generally non metallic fiber morphology, with a clear plastic deformation section.
3.5
Percentage off the total area of \u200b\u200bthe mouth area of \u200b\u200bthe fiber and the gap at the original cross-sectional area.
3.6
Side notch fracture width on each side and a large increase in the amount of millimeters (mm).
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