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GB/T 36233-2018 English PDF

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GB/T 36233-2018: Tubular cored electrodes for high-strength steels
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GB/T 36233-2018439 Add to Cart 4 days Tubular cored electrodes for high-strength steels Valid

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Basic data

Standard ID: GB/T 36233-2018 (GB/T36233-2018)
Description (Translated English): Tubular cored electrodes for high-strength steels
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J33
Classification of International Standard: 25.160.20
Word Count Estimation: 22,280
Date of Issue: 2018-05-14
Date of Implementation: 2018-12-01
Regulation (derived from): National Standards Announcement No. 6 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 36233-2018: Tubular cored electrodes for high-strength 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 high-strength steels ICS 25.160.20 J33 National Standards of People's Republic of China High strength steel flux cored wire (ISO 18276.2017,Weldingconsumables-Tubularcoredelectrodesfor steels-Classification, MOD) Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Model 1 4 Technical requirements 5 5 Test method 7 6 Re-inspection 9 7 Technical conditions for supply 9 Appendix A (informative) Article number comparison table 10 Appendix B (informative) The technical differences between this standard and ISO 18276.2017 and their reasons 11 Appendix C (informative) Flux cored wire type control 12 Appendix D (informative) Protective gas type code 14 Appendix E (informative) Chemical composition classification instructions 16 Appendix F (informative) Flux cored wire use characteristics description 17 Appendix G (Informative Appendix) Description of Diffusion Hydrogen 19

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the redrafting method to modify the use of ISO 18276.2017 "welding material gas protection and self-protective arc welding with high strength steel Flux cored wire classification (English version). Compared with ISO 18276.2017, this standard has more adjustments in structure. Appendix A lists this standard and ISO 18276.2017. Checklist of changes in the number of chapters; There are technical differences between this standard and ISO 18276.2017. 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 "High Strength Steel Flux Cored Wire"; --- Removed the ISO 18276.2017 Appendix A classification system (informative appendix); --- Removed the ISO 18276..2017 Appendix C according to the yield strength and the average 47J impact energy classification of the flux cored wire type Ming (informative appendix); --- 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 Jinqiao Welding Material Group Co., Ltd., Sichuan Atlantic Welding Materials Materials Co., Ltd., Kunshan Jingqun Welding Material Technology Co., Ltd., Tianjin Bridge Welding Material Group Co., Ltd., Baoji Petroleum Steel Pipe Co., Ltd. Division (National Oil and Gas Pipeline Engineering Technology Research Center), Wuhan Iron Anchor Welding Materials Co., Ltd., Jiangsu Zhongjiang Welding Wire Co., Ltd. Division, Fujian Industrial Equipment Installation Co., Ltd. Drafters of this standard. Song Bei, Chen Mo, Yang Yumei, Li Xinyu, Cao Shuiying, Qiao Liangyan, Yang Zongquan, Yan Wenbin, Liu Yun, Bi Zongyue, Yang Zijia, Hao Longyu, Qi Wanli, Fan Zhizhong, Li Sushan, Ma Qingjun, Su Jinhua. High strength steel flux cored wire

1 Scope

This standard specifies the type, technical requirements, test methods, re-inspection and technical conditions of supply of high-strength steel flux cored wire. This standard is applicable to gas protection and self-shielded arc welding with a minimum tensile strength requirement of deposited metal of not less than 590 MPa. Steel flux cored wire (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 2650 welded joint impact test method (GB/T 2650-2008, ISO 9016.2001, IDT) 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, ISO 13916.1996, IDT) 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 14175 welding materials and related methods for gas welding and mixed gases (Weldingconsumables-Gasesand Gasmixturesforfusionweldingandaliedprocesses)

3 models

3.1 Model division The wire type is based on the mechanical properties of the deposited metal, the use characteristics, the welding position, the type of protective gas, the state after welding and the chemical composition of the deposited metal. Wait for division. 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 eight 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. the test temperature code indicating that the impact energy (KV2) is not less than 27J, see Table 2; 4) Part 4. Indicates the use of the feature code, see Table 3; 5) Part 5. indicates the welding position code, see Table 4; 6) Part 6. Indicates the type of protective gas type, the code for self-protection is “N”, and the code for protective gas is in accordance with ISO 14175. See Appendix D; 7) Section 7. Indicates the post-weld status code, where “A” indicates the weld state, “P” indicates the post-weld heat treatment state, and “AP” indicates the weld state and Both states of post-weld heat treatment can be used; 8) Section 8. 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. a) the letter “U” indicates that the shock absorption energy (KV2) should not be less than 47J at the specified test temperature; b) Diffusion hydrogen code "HX", where "X" may be the number 15, 10 or 5, representing the diffusible hydrogen content per 100 g of deposited metal Maximum value (mL), see 4.6. The wire type examples in this standard are as follows. Example 1. Flux cored wire Indicates the tensile strength of the deposited metal, and "69" indicates a minimum of 690 MPa. Indicates that the impact absorption energy (KV2) is not less than the test temperature at 27 J, and "4" means -40 °C. T5- Indicates the use characteristics, "T5" indicates that the core type is calcium oxide-fluoride, using DC reverse connection, coarse drop transition, etc. Indicates the welding position, "0" indicates the flat welding and the fillet welding position C1 Indicates the type of shielding gas, "C1" indicates that the gas composition is 100% CO2 Indicates post-weld condition, "P" indicates post-weld heat treatment 4M2 Indicates the chemical composition of deposited metal Example 2. Flux cored wire Indicates the tensile strength of the deposited metal, and "69" indicates a minimum of 690 MPa. Indicates that the impact absorption energy (KV2) is not less than the test temperature at 27 J, and "5" indicates -50 °C. T5- Indicates the use characteristics, "T5" indicates that the core type is calcium oxide-fluoride, using DC Reverse connection, coarse transfer, etc. Indicates the welding position, "1" indicates the full position M21 Indicates the type of protective gas, "M21" means the gas composition is (15%) \u003cCO2≤25%) Ar Indicates the post-weld state, "A" indicates the as-welded state N3M1 Indicates the chemical composition of deposited metal Optional additional code indicating the shock absorption energy (KV2) at the specified test temperature Not less than 47J H5 Optional additional code means that the diffused hydrogen content of the deposited metal is not more than 5mL/100g Example 3. Flux cored wire Indicates the tensile strength of the deposited metal, and "62" indicates a minimum of 620 MPa. Indicates that the shock absorption energy (KV2) is not less than the test temperature at 27 J, and "3" indicates -30 °C. T8- Indicates the use characteristics, "T8" indicates that the type of core is not specified, using DC positive connection, fine droplets or Jet transition, etc. Indicates the welding position, "1" indicates the full position Indicates the type of protective gas, "N" indicates self-protection Indicates the post-weld state, "A" indicates the as-welded state N2 Indicates the chemical composition of deposited metal H5 Optional additional code means that the diffused hydrogen content of the deposited metal is not more than 5mL/100g Example 4. Flux cored wire Indicates the tensile strength of the deposited metal, and "83" indicates a minimum of 830 MPa. Indicates that the impact absorption energy (KV2) is not less than the test temperature at 27 J, and "5" indicates -50 °C. T15- Indicates the use characteristics, "T15" indicates that the core type is metal powder type, and DC reverse connection is used. Fine droplet ejection transition, etc. Indicates the welding position, "1" indicates the full position M20 Indicates the type of shielding gas, "M20" means the composition of the gas is (5% \u003cCO2≤15%) Ar Indicates the post-weld state, "A" indicates the as-welded state N3C1M2 Indicates the chemical composition of deposited metal H5 Optional additional code means that the diffused hydrogen content of the deposited metal is not more than 5mL/100g Table 1 deposited metal tensile strength code Tensile strength code Tensile strength Rm MPa Yield strength aReL MPa Elongation after break A 59 590~790 ≥490 ≥16 62 620~820 ≥530 ≥15 69 690~890 ≥600 ≥14 76 760~960 ≥680 ≥13 78 780~980 ≥680 ≥13 83 830~1030 ≥745 ≥12 a When the yield is not obvious, the specified plastic elongation strength Rp0.2 should be determined. Table 2 Impact test temperature code Impact test temperature code The test temperature at which the impact energy (KV2) is not less than 27J Z a Y 20 0 0 2 -20 3 -30 4 -40 5 -50 6 -60 7 -70 8 -80 a indicates that the impact test is not required. Table 3 Use feature code Use special Sex code Protective gas current type droplet transfer form core type welding position a characteristic T1 requires DC reverse jet injection transition rutile 0 or 1 less splash, flat or slightly convex weld bead, high deposition rate T5 requires DC reverse connection b coarse drop transition Calcium Oxide- Fluoride 0 or 1 Micro-convex weld bead, can not completely cover the thin slag of the weld bead, Compared with T1, it has good impact toughness and good cold resistance. Crack and thermal crack resistance T7 does not require DC positive connection Fine droplet drop to spray transition Does not specify 0 or 1 high deposition rate, excellent resistance to thermal cracking T8 does not require DC positive connection Fine droplets or jets transition Does not specify 0 or 1 good low temperature impact toughness T11 does not require DC positive injection injection without specifying 0 or 1 Not recommended for preheating and inter-channel temperature control Steel with a thickness greater than 19mm T15 requires DC reverse connection Fine droplet Jet transition Metal powder type 0 or 1 core contains alloy and iron powder, low slag coverage TG supply and demand agreement Note. Refer to Appendix F for the characteristics of the use of the wire. a See Table 4. b Use under DC positive connection to improve weldability at unfavorable locations. The current type is recommended by the manufacturer. Table 4 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 5. Table 5 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 wire deposited metal shall comply with the requirements of Table 6. Table 6 Chemical composition of deposited metal Chemical formation Sub-classification Chemical composition (mass fraction) a, b C Mn Si PS Ni Cr Mo V N2 0.15 1.00~2.00 0.40 0.030 0.030 0.50~1.50 0.20 0.20 0.05 N5 0.12 1.75 0.80 0.030 0.030 1.75~2.75 - - - N51 0.15 1.00~1.75 0.80 0.030 0.030 2.00~2.75 - - - N7 0.12 1.75 0.80 0.030 0.030 2.75~3.75 - - - 3M2 0.12 1.25~2.00 0.80 0.030 0.030 - - 0.25~0.55 - 3M3 0.12 1.00~1.75 0.80 0.030 0.030 - - 0.40~0.65 - 4M2 0.15 1.65~2.25 0.80 0.030 0.030 - - 0.25~0.55 - Table 6 (continued) Chemical formation Sub-classification Chemical composition (mass fraction) a, b C Mn Si PS Ni Cr Mo V N1M2 0.15 1.00~2.00 0.80 0.030 0.030 0.40~1.00 0.20 0.50 0.05 N2M1 0.15 2.25 0.80 0.030 0.030 0.40~1.50 0.20 0.35 0.05 N2M2 0.15 2.25 0.80 0.030 0.030 0.40~1.50 0.20 0.20~0.65 0.05 N3M1 0.15 0.50~1.75 0.80 0.030 0.030 1.00~2.00 0.15 0.35 0.05 N3M11 0.15 1.00 0.80 0.030 0.030 1.00~2.00 0.15 0.35 0.05 N3M2 0.15 0.75~2.25 0.80 0.030 0.030 1.25~2.60 0.15 0.25~0.65 0.05 N3M21 0.15 1.50~2.75 0.80 0.030 0.030 0.75~2.00 0.20 0.50 0.05 N4M1 0.12 2.25 0.80 0.030 0.030 1.75~2.75 0.20 0.35 0.05 N4M2 0.15 2.25 0.80 0.030 0.030 1.75~2.75 0.20 0.20~0.65 0.05 N4M21 0.12 1.25~2.25 0.80 0.030 0.030 1.75~2.75 0.20 0.50 - N5M2 0.07 0.50~1.50 0.60 0.015 0.015 1.30~3.75 0.20 0.50 0.05 N3C1M2 0.10~0.25 0.60~1.60 0.80 0.030 0.030 0.75~2.00 0.20~0.70 0.15~0.55 0.05 N4C1M2 0.15 1.20~2.25 0.80 0.030 0.030 1.75~2.60 0.20~0.60 0.20~0.65 0.03 N4C2M2 0.15 2.25 0.80 0.030 0.030 1.75~2.75 0.60~1.00 0.20~0.65 0.05 N6C1M4 0.12 2.25 0.80 0.030 0.030 2.50~3.50 1.00 0.40~1.00 0.05 GX - ≥1.75c ≥0.80c 0.030 0.030 ≥0.50c ≥0.30c ≥0.20c ≥0.10c 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 For self-shielded welding wire, Al≤1.8%; c At least one element meets the requirements, and other chemical composition requirements shall be agreed between the supplier and the buyer. 4.4 Mechanical properties 4.4.1 Tensile test The tensile test results of the deposited metal shall comply with the requirements of Table 1. 4.4.2 Impact test 4.4.2.1 Charpy V-notch impact test temperature The impact absorption energy (KV2) of five impact specimens was determined as specified in Table 2. In calculation When averaging the five shock absorption energies (KV2), one maximum value and one minimum value should be removed. Two of the remaining three values should not Less than 27J, the other may be less than 27J, but should not be less than 20J, and the average of the three values should not be less than 27J. 4.4.2.2 If the optional code “U” is attached to the model, the impact requirements shall be measured according to the temperature specified in Table 2. Receive energy (KV2). One of the three values can be less than 47J, but should not be less than 32J, and the average of the three values should not be less than 47J. 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, gas shielded welding wire is Φ1.2mm, self-shielded welding......
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