GB/T 10045-2018 Tubular cored electrodes for non-alloy and fine grain steels
1 Scope
This standard specifies the designations, technical requirements, test methods, retesting, and conditions of supply for tubular cored electrodes for non-alloy and fine grain steels.
This standard is applicable to the tubular cored electrodes for non-alloy and fine grain steels for gas shielded and self-shielded metal arc welding (hereinafter referred to as “electrodes") with a minimum tensile strength of up to 570 MPa.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 700 Carbon Structural Steels (GB/T 700-2006, ISO 630: 1995, NEQ)
GB/T 1591 High strength low alloy structural steels
GB/T 2650 Impact test methods on welded joints (GB/T 2650-2008, ISO 9016: 2001, IDT)
GB/T 2651 Tensile test method on welded joints (GB/T 2651-2008, ISO 4136: 2001, IDT)
GB/T 2652 Tensile test methods on weld and deposited metal (GB/T 2652-2008, ISO 5178:2001, IDT)
GB/T 3323 Radiographic examination of fusion welded joints in metallic materials
GB/T 3965 Determination of diffusible hydrogen in deposited metal (GB/T 3965-2012, ISO 3690:2000, MOD)
GB/T 16672 Welds - Working positions - Definitions of angles of slope and rotation (GB/T 16672-1996, Idt ISO 6947:1990)
GB/T 18591 Welding - Guidance on the measurement of preheating temperature,interpass temperatureand preheat maintenance temperature (GB/T 18591-2001, idt ISO 13916:1996)
GB/T 25774.1 Test methods for welding consumables - Part 1 : Preparation and testing of deposited metal specimens for mechanical properties in steel,nickel and nickel alloys (GB/T 25774.1-2010, ISO 15792-1:2000, MOD)
GB/T 25774.2 Test methods for welding consumables - Part 2;Preparation and testing of deposited metal specimens for mechanical properties in steel, nickel and nickel alloys (GB/T 25774.2-2010, ISO 15792-2: 2000, MOD)
GB/T 25774.3 Test methods for welding consumables-Part 3:Preparation and testing of a fillet weld specimens for T-joint (GB/T 25774.3-2010, ISO 15792-3:2000, IDT)
GB/T 25775 Technical delivery conditions for welding consumables-Type of product,dimensions,tolerances and markings (GB/T 25775-2010, ISO 544:2003, MOD)
GB/T 25777 Preparation methods of deposited metal specimens for chemical analysis (GB/T 25777-2010, ISO 6847: 2000, IDT)
GB/T 25778 Procurement guidelines for welding consumables (GB/T 25778-2010, ISO 14344:2010, MOD)
ISO 14175 Welding consumables - Gases and gas mixtures for fusion welding and allied processes
3 Designations
3.1 Classification
Classification of electrode designations is based upon mechanical properties, usability characteristics, welding position, shielding gas type, post-weld condition and chemical compositions of the deposited metal. It applies to single-pass electrodes only, and their designation classification does not include the post-weld condition and the chemical composition of the deposited metal. For a comparison of the cored electrode designations between this standard and other relevant standards, refer to Annex C.
3.2 Designation classification means
The designation is divided into eight parts:
1) The first part: T indicates a tubular cored electrode;
2) The second part: a designator indicating the tensile strength property of the deposited metal when used for multi-pass welding under as-welded or post-weld heat treatment conditions, see Table 1; or a designator indicating the tensile strength property of the welded joint when used for single-pass welding under as-welded conditions, see Table 2;
3) The third part: a designator indicating the test temperature when the impact absorbed energy (KV₂) is not less than 27 J,see Table 3. For electrodes only applicable to single-pass welding, this designator does not apply;
4) The fourth part: a designator indicating the usability characteristic, see Table 4;
5) The fifth part: a designator indicating the welding position, see Table 5;
6) The six part: a designator indicating the shielding gas type, which is "N” for self shielding, and shall be in accordance with the provisions of ISO 14175 for shielding gas, see Annex D. The letter “S” shall be added to this designator for the electrode only applicable to single-pass welding.
7) The seventh part: a designator indicating post-weld condition, where "A" indicates the as-welded condition, "P" indicates the post-weld heat treatment condition, and "AP" can indicate both as-welded and post-weld heat treatment conditions;
8) The eighth part: the chemical composition classification of deposited metal, see 4.3.
In addition to the compulsory sections above, optional section may be added thereafter:
Contents
Foreword I
1 Scope
2 Normative references
3 Designations
4 Technical requirements
5 Test method
6 Retests
7 Technical delivery conditions
Annex A (Informative) Comparison of clause/subclause numbers
Annex B (Informative) Technical deviations between this standard and ISO 17632:2015 and their justifications
Annex C (Informative) Comparison of designations of tubular cored electrodes
Annex D (Informative) Designators for shielding gas types
Annex E (Informative) Description of usability characteristics of tubular cored electrodes
Annex F (Informative) Notes on diffusible hydrogen
