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GB/T 25774.1-2010 English PDF (GBT25774.1-2010)

GB/T 25774.1-2010 English PDF (GBT25774.1-2010)

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GB/T 25774.1-2010: Test methods for welding consumables -- Part 1: Preparation and testing of deposited metal specimens for mechanical properties in steel, nickel and nickel alloys

This Part of GB/T 25774 specifies preparation for deposited metal tensile specimens and impact specimens of steel, nickel and nickel alloy welding materials, as well as inspection methods. This Part is applicable to determination of mechanical properties of welding materials or other arc welding deposited metals for steel, nickel and nickel alloys.
GB/T 25774.1-2010
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 25.160.20
J 33
Test methods for welding materials - Part 1: Preparation
and testing of deposited metal specimens for mechanical
properties in steel, nickel and nickel alloys
(ISO 15792-1:2000, Welding materials - Test methods - Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys, MOD) ISSUED ON: DECEMBER 23, 2010
IMPLEMENTED ON: JUNE 01, 2011
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 General principle ... 5
4 Test base material ... 6
5 Preparation of test piece ... 6
6 Welding conditions ... 6
7 Heat treatment ... 8
8 Sampling position and specimen size ... 8
9 Reinspection ... 9
10 Test report ... 9
Foreword
GB/T 25774 "Test methods for welding materials" consists of the following three parts: - Part 1: Preparation and testing of deposited metal specimens for mechanical properties in steel, nickel and nickel alloys;
- Part 2: Preparation of single-run and two-run technique test specimens in steel; - Part 3: Preparation and testing of a fillet weld specimens for T-joint. This Part is Part 1 of GB/T 25774 "Test methods for welding materials". It modified and adopted ISO 15792-1:2000 "Welding materials - Test methods - Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys". Considering the actual situation of the mechanical properties test of the deposited metal of welding materials in China, when adopting ISO 15792-1:2000, the following technical content modifications were made:
- Delete normative references ISO 5178, ISO 9016:2000 and ISO 13916:1996. Use Chinese national standards that have equivalently adopted these ISO standards to replace;
- Add 12 specimen types 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9; - According to domestic practice in China, for the test pieces of type 1.0 and 1.1 in ISO 15792-1, as well as the test pieces of types 2.2, 2.3, 2.7 and 2.8 added, use ??6mm pull rods instead of ??8mm pull rods;
- In Chapter 4 "Test base material", add the requirements that the thickness of the isolation layer is not less than 3mm;
- Specify the requirements for the dimensions of tensile and impact test specimens. The following editorial modifications are also made in this Part:
- Change the standard?€?s name to "Test methods for welding materials - Part 1: Preparation and testing of deposited metal specimens for mechanical properties in steel, nickel and nickel alloys".
This Part was proposed by and shall be under the jurisdiction of National Technical Committee on Welding of Standardization Administration of China (SAC/TC 55). The drafting organizations of this Part: Tianjin Bridge Welding Materials Group Co., Ltd., Harbin Welding Research Institute, Jiande Xin'anjiang Welding Rod Factory, Beijing Jinwei Welding Materials Co., Ltd., Wuhan Tiezhu Welding Materials Co., Ltd., Tianjin Jinqiao Welding Materials Group Co., Ltd.
Test methods for welding materials - Part 1: Preparation
and testing of deposited metal specimens for mechanical
properties in steel, nickel and nickel alloys
1 Scope
This Part of GB/T 25774 specifies preparation for deposited metal tensile specimens and impact specimens of steel, nickel and nickel alloy welding materials, as well as inspection methods.
This Part is applicable to determination of mechanical properties of welding materials or other arc welding deposited metals for steel, nickel and nickel alloys. 2 Normative references
The provisions in following documents become the provisions of this Part of GB/T 25774 through reference in this Part. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Part, however, parties who reach an agreement based on this Part are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 2650, Impact test methods on welded joints (GB/T 2650-2008, ISO 9016:2001, IDT)
GB/T 2652, Tensile test methods on weld and deposited metal (GB/T 2652-2008, ISO 5178:2001, IDT)
GB/T 18591, Welding - Guidance on the measurement of preheating temperature, inter-pass temperature and preheat maintenance temperature (GB/T 18591-2001, ISO 13916:1996, IDT)
3 General principle
The test welding materials shall be selected according to the requirements of the relevant product standards. The tensile test specimens and impact test specimens for deposited metal shall be prepared according to the following requirements. 4 Test base material
The base metal used for the test shall be consistent with the material used for the test of the mechanical properties of the deposited metal required in the welding material product standard. If other base metal is used, at least two isolation layers shall be welded on the groove surface and the backing plate surface through the tested welding material. The thickness of the isolation layer is not less than 3mm after machining, so as to ensure minimal dilution.
5 Preparation of test piece
The test piece shall be prepared in the form of a V-groove with a backing plate. The backing plate is fixedly welded on the back of the test piece, see Figure 1 and Table 1. The test plate shall be deformed or restrained before welding, so as to prevent corner deformation. The test piece is not allowed to be corrected after welding. The test pieces with angular deformation exceeding 5?? shall be discarded.
The dimensions of each type of test piece are shown in Table 1. The type of test piece shall be selected according to the provisions of the relevant welding material product standards.
6 Welding conditions
The test piece shall be prepared in the flat welding position. Welding in other positions is permitted unless other positions are specified in the product standard for welding materials.
When starting welding, the temperature of the test plate shall be heated to the preheating temperature specified in the welding material product standard. Maintain inter-pass temperature during welding. When the temperature of the test plate is exceeded, it shall be cooled in a static atmosphere. Surface thermometer, temperature measuring pen or thermocouple can be used for preheating temperature and inter-pass temperature. Measure according to GB/T 18591. It is recommended that the surface of the longitudinal center of the test piece at a distance of 25mm from the center of the weld be used as the temperature measurement point.
The inter-pass temperature and welding specification are required by the welding material product standard. If welding must be interrupted, the test panel shall be cooled in a static atmosphere. When re-welding, the test panel shall be heated to the specified inter-pass temperature.

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