GB/T 15970.3-1995 PDF in English
GB/T 15970.3-1995 (GB/T15970.3-1995, GBT 15970.3-1995, GBT15970.3-1995)
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| GB/T 15970.3-1995 | English | 95 |
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Corrosion of metals and alloys. Stress corrosion testing. Part 3: Preparation and use of U--bend specimens
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Standards related to (historical): GB/T 15970.3-1995
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GB/T 15970.3-1995: PDF in English (GBT 15970.3-1995) GB/T 15970.3-1995
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 25
GB/T 15970.3-1995 / idt ISO 7539-3.1989
Corrosion of Metals and Alloys - Stress Corrosion Testing
- Part 3. Preparation and Use of U-Bend Specimens
ISSUED ON. DECEMBER 25, 1995
IMPLEMENTED ON. JUNE 01, 1996
Issued/Approved by. State Bureau of Technical Supervision
Table of Contents
Foreword ... 3
ISO Foreword ... 4
1 Scope ... 5
2 Normative References ... 5
3 Definitions ... 6
4 Principle ... 6
5 Specimens ... 6
6 Procedure ... 8
7 Assessment of Results ... 8
8 Test Report ... 9
Foreword
This Standard equivalently adopts international standard of ISO 7539-3.1989
Corrosion of Metals and Alloys – Stress Corrosion Testing – Part 3. Preparation and
Use of U-Bend Specimens.
GB/T 15970 includes the following parts under the general title of “Corrosion of Metals
and Alloys – Stress Corrosion Testing”.
--- Part 1. (GB/T 15970.1-1995) General Guidance on Testing Procedures;
--- Part 2. Preparation and Use of Bent-Beam Specimens;
--- Part 3. (GB/T 15970.3-1995) Preparation and Use of U-Bend Specimens;
--- Part 4. Preparation and Use of Uniaxially Loaded Tension Specimens;
--- Part 5. Preparation and Use of C-Ring Specimens;
--- Part 6. Preparation and Use of Pre-Cracked Specimens;
--- Part 7. Slow Strain Rate Testing;
--- Part 8. Preparation and Use of Specimens to Evaluate Weldments.
Parts 2, 4, 5, 6, 7, 8 will be formulated later.
This Standard was proposed by National Technical Committee for Standardization of
Steels.
This Standard shall be under the jurisdiction of China Metallurgical Information and
Standardization Research Institute.
Drafting organizations of this Standard. Central Iron and Steel Research Institute,
Ministry of Metallurgical Industry; and Luoyang Copper Working Plant.
Chief drafting staffs of this Standard. He Mingshan, He Shulin, and Ji Xiaochun.
Corrosion of Metals and Alloys - Stress Corrosion Testing
- Part 3. Preparation and Use of U-Bend Specimens
WARNING - U-bend specimens made from high strength materials may fracture
rapidly; pieces may fly off at high velocity and can be dangerous. Personnel installing
and examining specimens must be made aware of this possibility and be protected
against injury.
1 Scope
1.1 This Part of GB/T 15970.3 covers procedures for designing, preparing and using
U-bend test specimens for investigating the susceptibility of a metal to stress corrosion.
The term ''metal" as used in this Part includes alloys.
1.2 U-bend specimens may be used to test a variety of product forms. They are used
principally for sheet, plate or flat extruded material, which conveniently provides flat
specimens of rectangular cross-section, but may also be employed for wire or rod, or
for machined specimens of circular cross-section. They can also be used for parts
joined by welding.
1.3 The U-bend test is frequently used to establish whether a metal is susceptible to
stress corrosion cracking in a given environment. It is used in laboratories to screen
materials for susceptibility for specific applications and in use environments to assess
the risk of failure.
1.4 The principal advantages of the test are its simplicity and its consequent
adaptability for use in plant. A disadvantage is that stresses cannot be quantified with
accuracy and if this is desired an alternative method of stressing should be used.
2 Normative References
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Part of GB/T 15970.3. At the time of publication, the
editions indicated are valid. All standards are subject to revision. Basing on GB/T
15970.3, the parties who are using this Standard shall explore the possibility of using
the latest version of the following standards.
GB/T 15970.1-1995 Corrosion of Metals and Alloys - Stress Corrosion Testing -
Part 1. General Guidance on Testing Procedures (idt ISO 7539-1.1987)
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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