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GB/T 17493-2018 English PDF

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GB/T 17493-2018: Tubular cored electrodes for creep-resisting steels
Status: Valid

GB/T 17493: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 17493-2018379 Add to Cart 4 days Tubular cored electrodes for creep-resisting steels Valid
GB/T 17493-2008RFQ ASK 6 days Low alloy steel flux cored electrodes for arc welding Obsolete
GB/T 17493-1998839 Add to Cart 6 days Low alloy steel flux cored electrodes for arc welding Obsolete

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Basic data

Standard ID: GB/T 17493-2018 (GB/T17493-2018)
Description (Translated English): Tubular cored electrodes for creep-resisting steels
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J33
Classification of International Standard: 25.160.20
Word Count Estimation: 19,140
Date of Issue: 2018-05-14
Date of Implementation: 2018-12-01
Older Standard (superseded by this standard): GB/T 17493-2008
Quoted Standard: GB/T 2652; GB/T 3323; GB/T 3965; GB/T 16672; GB/T 18591; GB/T 25774.1; GB/T 25774.3; GB/T 25775; GB/T 25777; GB/T 25778; ISO 17145
Adopted Standard: ISO 17634-2015, MOD
Regulation (derived from): National Standards Announcement No. 6 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the type, technical requirements, test methods, re-inspection and technical conditions of supply of flux steel cored wire. This standard applies to gas shielded arc welding with heat-strength steel flux cored wire (hereinafter referred to as "wire").

GB/T 17493-2018: Tubular cored electrodes for creep-resisting steels

---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.
Tubular cored electrodes for creep-resisting steels ICS 25.160.20 J33 National Standards of People's Republic of China Replace GB/T 17493-2008 Heat-strength steel flux cored wire (ISO 17634.2015, Weldingconsumables- Creep-resistingsteels-Classification, MOD) Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Model 1 4 Technical requirements 3 5 Test method 5 6 Retest 7 7 Technical conditions for supply 7 Appendix A (informative) Chapter No. Comparison Table 8 Appendix B (informative appendix) Technical differences between this standard and ISO 17634.2015 and their causes 9 Appendix C (informative) Flux cored wire type control 10 Appendix D (informative) Protective gas type code 12 Appendix E (informative) Chemical composition classification description 14 Appendix F (informative) Flux cored wire use characteristics description 15 Appendix G (Informative Appendix) Description of Diffusion Hydrogen 16

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 17493-2008 "low alloy steel flux cored wire". And GB/T 17493-2008 "low alloy steel flux cored welding Compared with Silk, the main changes are as follows. --- The standard name was changed to "heat-strength steel flux cored wire"; --- This standard revision only retains the heat-strength steel cored wire in the original standard. Other welding wires are adjusted according to their tensile strength range. To GB/T 10045 "Non-alloy steel and fine-grain steel flux cored wire" and "High-strength steel flux-cored wire" standard; --- Re-programmed the heat-strength steel flux-cored wire retained in the original standard according to ISO 17634.2015, and adjusted the technology Claim; ---In accordance with ISO 17634.2015, the classification of 9C1MV1 chemical composition has been added; --- For the type division, T-joint fillet weld, mechanical properties and chemical composition requirements according to ISO 17634.2015, the corresponding Adjustment. This standard uses the redrafting method to modify the use of ISO 17634.2015 "welding material gas shielded arc welding heat-strength steel flux cored wire Classification" (English version). Compared with ISO 17634.2015, this standard has more structural adjustments. Appendix A lists this standard and ISO 17634.2015. Checklist of changes in the number of chapters; There are technical differences between this standard and ISO 17634.2015. Appendix B gives the corresponding technical differences and their causes. Watch list. This standard also made the following editorial changes. --- Change the standard name to "heat-strength steel flux cored wire"; --- Added Appendix C flux core wire type control (informative appendix); --- Added Appendix D protective gas type code (informative appendix); This standard is proposed and managed by the National Welding Standardization Technical Committee (SAC/TC55). This standard was drafted. Harbin Welding Research Institute Co., Ltd., Tianjin Bridge Welding Materials Group Co., Ltd., Kunshan Jingqun Welding Materials Technology Limited Company, Sichuan Atlantic Welding Materials Co., Ltd., Wuhan Iron Anchor Welding Materials Co., Ltd., Tianjin Jinqiao Welding Materials Group Limited company, China Power Construction Group Shanghai Energy Equipment Co., Ltd. Drafters of this standard. Ma Qingjun, Chen Mo, Yang Tianwen, Tong Tianwang, Zhang Xiaobai, Cai Jun, Zhang Jian, Wu Baoxin, Li Sushan, Yang Zijia, An Hongliang, Su Jinhua, Qi Wanli, Song Bei. The previous versions of the standards replaced by this standard. ---GB/T 17493-1998, GB/T 17493-2008. Heat-strength steel flux cored wire

1 Scope

This standard specifies the type, technical requirements, test methods, re-inspection and technical conditions of supply of heat-strength steel flux cored wire. This standard applies to heat-strength steel flux-cored wire for gas-shielded arc welding (hereinafter referred to as "welding wire").

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2652 Weld and deposited metal tensile test method (GB/T 2652-2008, ISO 5178.2001, IDT) GB/T 3323 metal fusion welding joints radiography GB/T 3965 Method for determination of diffusible hydrogen in deposited metal (GB/T 3965-2012, ISO 3690.2000, MOD) GB/T 16672 Definition of dip angle and corner of weld working position (GB/T 16672-1996, idtISO 6947.1990) GB/T 18591 Welding preheating temperature, inter-channel temperature and preheating maintenance temperature measurement guide (GB/T 18591-2001, idt ISO 13916.1996) GB/T 25774.1 Inspection of welding materials - Part 1 . Preparation and inspection of mechanical properties of steel, nickel and nickel alloys Inspection (GB/T 25774.1-2010, ISO 15792-1.2000, MOD) GB/T 25774.3 Inspection of welded materials - Part 3. Preparation and inspection of T-joint fillet weld specimens (GB/T 25774.3- 2010, ISO 15792-3.2000, IDT) GB/T 25775 Welding materials supply technical conditions Product type, size, tolerance and mark (GB/T 25775-2010, ISO 544.2003, MOD) GB/T 25777 welding material deposited metal chemical analysis sample preparation method (GB/T 25777-2010, ISO 6847.2000, IDT) GB/T 25778 Welding Materials Purchasing Guide (GB/T 25778-2010, ISO 14344.2010, MOD) ISO 17145 welding materials and related methods for gas welding and mixed gases (Weldingconsumables-Gasesand Gasmixturesforfusionweldingandaliedprocesses)

3 models

3.1 Model division The wire type is drawn according to the mechanical properties of the deposited metal, the use characteristics, the welding position, the type of shielding gas and the chemical composition of the deposited metal. Minute. Refer to Appendix C for the comparison of this standard with other related standards for flux cored wire. 3.2 Model preparation method The wire type consists of six parts. 1) Part 1. The fuse "wire" is indicated by the letter "T"; 2) The second part. indicates the tensile strength code of the deposited metal, see Table 1; 3) The third part. indicates the use of the feature code, see Table 2; 4) Part IV. indicates the welding position code, see Table 3; 5) Part 5. indicates the type of protective gas type, the code of the protective gas is in accordance with ISO 14175, see Appendix D; 6) Section 6. Indicates the chemical composition of deposited metal, see 4.3, and Appendix E for the classification. In addition to the above mandatory code, an optional code can be appended to it. Diffusion hydrogen code "HX", where "X" can be the number 15, 10 or 5, respectively representing the maximum amount of diffusible hydrogen per 100 g of deposited metal Value (mL), see 4.6. The wire type examples in this standard are as follows. Example 1. T 55 T5-0 M21-1CM H5 Optional additional code means that the diffused hydrogen content of the deposited metal is not more than 5mL/100g Indicates the chemical composition of deposited metal Indicates the type of protective gas, "M21" means the gas composition is (15%) \u003cCO2 ≤25%) Ar Indicates the welding position, "0" indicates the flat welding and the fillet welding position Indicates the use characteristics, "T5" indicates that the core type is calcium oxide-fluoride, using DC reverse or DC positive connection, coarse drop transition, etc. Indicates the tensile strength of the deposited metal, and "55" indicates a minimum of 550 MPa. Flux cored wire Example 2. T 62 T15-1 M13-2C1M Indicates the chemical composition of deposited metal Indicates the type of shielding gas, "M13" indicates that the gas composition is (0.5% ≤ O2 ≤ 3%) Ar Indicates the welding position, "1" indicates the full position Indicates the use characteristics, "T15" indicates that the core type is metal powder type, using DC Reverse connection, fine droplet ejection transition, etc. Indicates the tensile strength of the deposited metal, and "62" indicates a minimum of 620 MPa. Flux cored wire Table 1 deposited metal tensile strength code Tensile strength code Tensile strength Rm MPa 49 490~660 55 550~690 62 620~760 69 690~830 Table 2 Use feature code Use characteristic code to protect gas current type droplet transfer form core type welding position a characteristic T1 requires DC reverse jet injection transition rutile 0 or 1 Splash small, flat or slightly convex weld bead, melt High speed T5 requirements DC reverse connection or DC positive connection Coarse drop transition Calcium Oxide- Fluoride 0 or 1 Micro-convex weld bead, can not completely cover the weld The thin slag of the road, compared with the impact of T1 Good toughness, good resistance to cold cracking and Thermal crack resistance T15 requires DC reverse connection Fine droplet Jet transition Metal powder type 0 or 1 The core contains alloy and iron powder, slag Low coverage TG supply and demand agreement Note. Refer to Appendix F for the characteristics of the use of the wire. a See Table 3. Table 3 welding position code Welding position code welding position a 0 PA, PB 1 PA, PB, PC, PD, PE, PF, and/or PG a welding position see GB/T 16672, where PA = flat welding, PB = flat angle welding, PC = horizontal welding, PD = elevation welding, PE = overhead welding, PF = upright welding, PG = down vertical welding.

4 Technical requirements

4.1 Wire size and surface quality The wire size and surface quality shall comply with the provisions of GB/T 25775. 4.2 T-joint fillet weld 4.2.1 Specimen inspection of fillet welds shall be in accordance with GB/T 25774.3, where the unfused length of the weld root shall not exceed the total length of the weld 20%. 4.2.2 The weld crown and the difference between the lengths of the two weld legs shall comply with the requirements of Table 4. Table 4 Weld crown and the difference between the two legs are in millimeters Welded foot size weld crown degree difference between two solder legs < 7.0 ≤2.0 ≥7.0 ≤2.5 ≤ (0.5 × solder fillet size -0.5) 4.3 Chemical composition The chemical composition of the deposited metal of the wire shall comply with Table 5. Table 5 Chemical composition of deposited metal chemical composition classification Chemical composition (mass fraction)a C Mn Si PS Ni Cr Mo V 2M3 0.12 1.25 0.80 0.030 0.030 - - 0.40~0.65 - CM 0.05~0.12 1.25 0.80 0.030 0.030 - 0.40~0.65 0.40~0.65 - CML 0.05 1.25 0.80 0.030 0.030 - 0.40~0.65 0.40~0.65 - 1CM 0.05~0.12 1.25 0.80 0.030 0.030 - 1.00~1.50 0.40~0.65 - 1CML 0.05 1.25 0.80 0.030 0.030 - 1.00~1.50 0.40~0.65 - 1CMH 0.10~0.15 1.25 0.80 0.030 0.030 - 1.00~1.50 0.40~0.65 - 2C1M 0.05~0.12 1.25 0.80 0.030 0.030 - 2.00~2.50 0.90~1.20 - 2C1ML 0.05 1.25 0.80 0.030 0.030 - 2.00~2.50 0.90~1.20 - 2C1MH 0.10~0.15 1.25 0.80 0.030 0.030 - 2.00~2.50 0.90~1.20 - 5CM 0.05~0.12 1.25 1.00 0.025 0.030 0.40 4.0~6.0 0.45~0.65 - 5CML 0.05 1.25 1.00 0.025 0.030 0.40 4.0~6.0 0.45~0.65 - 9C1Mb 0.05~0.12 1.25 1.00 0.040 0.030 0.40 8.0~10.5 0.85~1.20 - 9C1MLb 0.05 1.25 1.00 0.040 0.030 0.40 8.0~10.5 0.85~1.20 - 9C1MVc 0.08~0.13 1.20 0.50 0.020 0.015 0.80 8.0~10.5 0.85~1.20 0.15~0.30 9C1MV1d 0.05~0.12 1.25~2.00 0.50 0.020 0.015 1.00 8.0~10.5 0.85~1.20 0.15~0.30 GXe other agreement components Note. The single values in the table are the maximum values. a Chemical analysis should be performed according to the elements specified in the table. If other elements are found during the analysis, the total amount of these elements (except iron) should not exceed 0.50%. b Cu ≤ 0.50%. c Nb. 0.02%~0.10%, N. 0.02%~0.07%, Cu≤0.25%, Al≤0.04%, (Mn Ni)≤1.40%. d Nb. 0.01% to 0.08%, N. 0.02% to 0.07%, Cu ≤ 0.25%, and Al ≤ 0.04%. The categories not listed in the e table can be represented by similar classifications, prefixed with the letter “G”. The chemical composition range is not specified, and it is not possible between the two classifications. replace. 4.4 Mechanical properties The tensile test results of the deposited metal shall comply with the requirements of Table 6. Table 6 Mechanical properties of deposited metal Wire type Tensile strength Rm MPa Prescribed plasticity Extension strength Rp0.2 MPa Elongation after break A Preheating temperature and Inter-channel temperature Post-weld heat treatment Heat treatment temperature Holding time Min T49TX-XX-2M3 490~660 ≥400 ≥18 135~165 605~635 60 15 0 T55TX-XX-2M3 550~690 ≥470 ≥17 135~165 605~635 60 15 0 T55TX-XX-CM 550~690 ≥470 ≥17 160~190 675~705 60 15 0 T55TX-XX-CML 550~690 ≥470 ≥17 160~190 675~705 60 15 0 Table 6 (continued) Wire type Tensile strength Rm MPa Prescribed plasticity Extension strength Rp0.2 MPa Elongation after break A Preheating temperature and Inter-channel temperature Post-weld heat treatment Heat treatment temperature Holding time Min T55TX-XX-1CM 550~690 ≥470 ≥17 160~190 675~705 60 15 0 T49TX-XX-1CML 490~660 ≥400 ≥18 160~190 675~705 60 15 0 T55TX-XX-1CML 550~690 ≥470 ≥17 160~190 675~705 60 15 0 T55TX-XX-1CMH 550~690 ≥470 ≥17 160~190 675~705 60 15 0 T62TX-XX-2C1M 620~760 ≥540 ≥15 160~190 675~705 60 15 0 T69TX-XX-2C1M 690~830 ≥610 ≥14 160~190 675~705 60 15 0 T55TX-XX-2C1ML 550~690 ≥470 ≥17 160~190 675~705 60 15 0 T62TX-XX-2C1ML 620~760 ≥540 ≥15 160~190 675~705 60 15 0 T62TX-XX-2C1MH 620~760 ≥540 ≥15 160~190 675~705 60 15 0 T55TX-XX-5CM 550~690 ≥470 ≥17 150~250 730~760 60 15 0 T55TX-XX-5CML 550~690 ≥470 ≥17 150~250 730~760 60 15 0 T55TX-XX-9C1M 550~690 ≥470 ≥17 150~250 730~760 60 15 0 T55TX-XX-9C1ML 550~690 ≥470 ≥17 150~250 730~760 60 15 0 T69TX-XX-9C1MV 690~830 ≥610 ≥14 150~250 730~760 60 15 0 T69TX-XX-9C1MV1 690~830 ≥610 ≥14 150~250 730~760 60 15 0 TXXTX-XX-GX agreement between supply and demand 4.5 Weld ray flaw detection Weld ray flaw detection shall comply with the Class II regulations of GB/T 3323. 4.6 deposited metal diffusion hydrogen content According to the negotiation between the supplier and the buyer, if the diffusion hydrogen code is added after the wire type, it should meet the requirements of Table 7. Table 7 Diffusion hydrogen content of deposited metal Diffusion hydrogen code Diffusion hydrogen content mL/100g H5 ≤5 H10 ≤10 H15 ≤15

5 Test methods

5.1 Wire size and surface quality 5.1.1 Size The wire diameter is inspected with a measuring tool with an accuracy of 0.01 mm, measured at the same position perpendicular to each other, and the measuring portion is not less than two. 5.1.2 Surface quality The surface quality of the welding wire shall be visually inspected for any part of the welding wire according to the provisions of GB/T 25775. 5.2 T-joint fillet weld test 5.2.1 Test base metal The test plate is made of unalloyed steel having a carbon content of not more than 0.30%. 5.2.2 Preparation of test pieces The test piece preparation of the T-joint fillet weld test was carried out in accordance with GB/T 25774.3. Welding parameters and wire diameter for testing by manufacturer recommend. For welding wire with welding position code "0", fillet weld test should be carried out at the position of PB; for welding position code "1" For the welding wire, the fillet weld test shall be carried out at the position of PE and PF (or PG). 5.3 Chemical analysis 5.3.1 Chemical analysis of deposited metal samples shall be prepared in accordance with the provisions of GB/T 25777, or on the tensile test bars of mechanical properties or after breaking. Made. When the arbitration test is conducted, it shall be carried out in accordance with the provisions of GB/T 25777. 5.3.2 Chemical composition analysis may be carried out by any suitable analytical method. In the arbitration test, the analysis method is confirmed by both the supplier and the buyer. 5.4 Mechanical properties test 5.4.1 Test base metal The base material for the test of mechanical properties of deposited metal shall be a steel plate equivalent to the chemical composition of the deposited metal. If other base metals are used, they should be The test layer is used to weld the separation layer on the groove surface and the surface of the pad, and the thickness thereof is not less than 3 mm after processing. 5.4.2 Preparation of test pieces 5.4.2.1 The mechanical properties of deposited metal are prepared according to GB/T 25774.1, using test piece type 1.3, the test plate width is not less than 125mm, For welding, Φ1.2mm welding wire is used, or other specifications are agreed by the supplier and the buyer. Welding parameters are recommended by the manufacturer. Test piece preparation The welding heat input, number of passes and number of layers shall be as specified in Table 8. 5.4.2.2 After the positioning of the test plate, the temperature of the test plate shall reach the specified preheating temperature during the welding, and the temperature between the channels shall be maintained during the welding process. 6. When the test plate temperature exceeds, it should be cooled naturally. Preheating temperature and surface temperature measurement according to GB/T 18591 using a surface thermometer, thermometer or thermocouple The temperature between the roads. 5.4.2.3 When the test piece requires post-weld heat treatment, it shall be carried out before the processing of the tensile specimen. The heat treatment conditions shall be as specified in Table 6. The test piece is placed in the furnace When inside, the furnace temperature should not be higher than 315 ° C, from 315 ° C, to a specified temperature at a rate of not more than 280 ° C/h. Reaching the holding time Thereafter, it is cooled with the furnace at a rate of not more than 195 ° C/h, and is allowed to be taken out of the furnace after being lower than 315 ° C, and naturally cooled to room temperature. Also available under It is necessary for both parties to agree to adopt other heat treatment specifications. 5.4.3 Tensile test The size and sampling position of the deposited metal tensile specimen are in accordance with GB/T 25774.1, and the tensile test is carried out according to GB/T 2652. 5.5 Radiographic test 5.5.1 Weld ray flaw detection test shall be carried out before the interception of the mechanical specimen. The bolster shall be removed before the ray flaw detection. 5.5.2 Weld flaw detection test shall be carried out according to GB/T 3323. 5.5.3 When assessing the weld ray flaw detection film, 25mm at both ends of the test piece shall be disregarded. 5.6 Deposited metal diffusion hydrogen test The diffusion hydrogen content of the deposited metal is determined according to GB/T 3965. See Appendix G for instructions on diffusible hydrogen. Table 8 Recommended welding heat input, number of rows and layers Wire diameter Mm Average heat input kJ/mm Number of tracks per layer The first layer of the first layer a Number of layers ≤0.8, 0.9 0.8~1.4 1 or 2 2 or 3 6~9 1.0, 1.2 1.0~2.0 1 or 2 2 or 3 6~9 1.4, 1.6 1.0~2.2 1 or 2 2 or 3 5~8 1.8, 2.0 1.4~2.6 1 or 2 2 or 3 5~8 2.4 1.6~2.6 1 or 2 2 or 3 4~8 2.8 2.0~2.8 1 or 2 2 or 3 4~7 3.2 2.2~3.0 1 or 2 2 4~7 4.0 2.6~3.3 1 2 4~7 a The last layer can be completed by 4 channels. 6 re-inspection If any of the tests fails, the item should be doubled. For chemical analysis, o......
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