NB/T 20009.7-2012 in English

1 Scope

This part specifies the models, technical requirements, test methods, inspection rules, etc. of stainless steel wires and filler rods (hereafter referred to as “welding wires”) for Class 1, 2, 3 components of pressurized water reactor nuclear power plant.
This part is applicable to ER308L, ER309L and DER316L stainless steel wires for tungsten electrode gas shielded arc welding of Class 1, 2, 3 components of pressurized water reactor nuclear power plant.

2 Normative References

The following documents are indispensable for the application of this document. For dated references, only the dated editions apply. For undated references, the latest editions (including any amendments) apply.
GB/T 223.03 Methods for Chemical Analysis of Iron, Steel and Alloy — The Diantipyryl Methane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.04 Alloyed Steel — Determination of Manganese Content — Potentiometric or Visual Titration Method
GB/T 223.05 Steel and Iron — Determination of Acid-soluble Silicon and Total Silicon Content — Reduced Molybdosilicate Spectrophotometric Method (GB/T 223.05-2008, ISO 4829-1:1986, ISO 4829-2:1988, MOD)
GB/T 223.11 Iron Steel and Alloy — Determination of Chromium Content — Visual Titration or Potentiometric Titration Method (GB/T 223.11-2008, ISO 4937:1986, MOD)
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy — The Sodium Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy — The Neocuproine-chloroform Extraction Photometric Method for the Determination of Copper Content
GB/T 223.21 Methods for Chemical Analysis of Iron Steel and Alloy — The 5-CL-PADAB Spectrophotometric Method for the Determination of Cobalt Content
GB/T 223.22 Methods for Chemical Analysis of Iron, Steel and Alloy — The Nitroso-R-salt Spectrophotometric Method for the Determination of Cobalt Content
GB/T 223.25 Methods for Chemical Analysis of Iron, Steel and Alloy — The Dimethylglyoxime Spectrophotometric Method for the Determination of Nickel Content
GB/T 223.26 Methods for Chemical Analysis of Iron, Steel and Alloy — The Thiocyanate Direct Photometric Method for the Determination of Molybdenum Content
GB/T 223.36 Methods for Chemical Analysis of Iron, Steel and Alloy — The Neutral Titration Method for the Determination of Nitrogen Content after Distillation Separation
GB/T 223.37 Methods for Chemical Analysis of Iron, Steel and Alloy — The Indophenal Blue Photometric Methods for the Determination of Nitrogen Content after Distillation Separation
GB/T 223.38 Methods for Chemical Analysis of Iron, Steel and Alloy — The Anion-exchange Separation-gravimetric Method for the Determination of Niobium Content
GB/T 223.40 Iron Steel and Alloy — Detetmination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method
GB/T 223.59 Methods for Chemical Analysis of Iron, Steel and Alloy — The Reduced Molybdoantimonyl Phosphoric Acid Photometric Method for the Determination of Phosphorus Content
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy — The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy — The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content

Contents
Foreword I
1 Scope
2 Normative References
3 Type
4 Technical Requirements
4.1 Chemical composition
4.2 Size
4.3 Surface quality
4.4 Winding requirements
4.5 Mechanical property of deposited metal (as welded)
4.6 Delta ferrite content determination of deposited metal (as welded)
4.7 Intergranular corrosion test of deposited metal (heat treatment condition)
4.8 Radiographic test for weld
5 Test Methods
5.1 Chemical composition analysis
5.2 Size and surface quality
5.3 Preparation of deposited metal specimen
5.4 Mechanical property test of deposited metal
5.5 Delta ferrite content of deposited metal
5.6 Intergranular corrosion test of deposited metal
5.7 Radiographic test for weld
6 Inspection Rules
6.1 Batch division
6.2 Sampling method
6.3 Acceptance
6.4 Re-inspection
7 Packaging, Marking and Quality Certificate
7.1 Packaging
7.2 Marking
7.3 Quality Certificate
Appendix A (Normative) Delong Diagram