GB/T 5118-1995 Low alloy steel welding rods

This standard specifies the model classification, technical requirements, test methods and inspection rules of low alloy steel welding rods. This standard applies to low alloy steel welding rods with coating for manual arc welding. GB/T 5118-1995 Low alloy steel welding rods GB/T5118-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Low alloy
Low alloy steel covered electrodes1 Subject content and scope of application
GB/T 5118-1995
Replaces GB5118-85
This standard specifies the model classification, technical requirements, test methods and inspection rules of low alloy steel electrodes. This standard applies to low alloy steel electrodes with coating for manual arc welding. 2. Reference standards
GB700 Carbon structural steel
GB/T1591 Low alloy high strength structural steel
GB223.1~223.24 Chemical analysis methods for steel and alloys GB2652 Tensile test method for welds and deposited metals GB2650 Impact test method for welded joints
GB3323 Radiography and quality grading of steel fusion welded butt joints GB/T3965 Determination of diffusible hydrogen in deposited metal 3 Model classification
3.1 Principles of model classification
Welding rods are classified into models according to the mechanical properties, chemical composition, coating type, welding position and current type of the deposited metal, as shown in Table 1 and Table 2.
3.2 Model compilation method
The letter "E" represents the electrode, and the first two digits represent the minimum tensile strength of the deposited metal; the third digit represents the welding position of the electrode, "0" and "1\" represent that the electrode is suitable for all-position welding (flat welding, vertical welding, overhead welding and horizontal welding), and "2" represents that the electrode is suitable for flat welding and flat fillet welding: the third and fourth digits, when combined, represent the type of welding current and the type of coating; the suffix letter is the chemical composition classification code of the deposited metal and is separated from the preceding digit by a short stroke "_\. If there are additional chemical components, the additional chemical components are directly represented by element symbols and separated from the preceding suffix letter by a short stroke \_\. For E50XX-X, E55XX-X, E60XX-X low-hydrogen electrodes, when the letter "R" is added after the chemical composition classification suffix letter or additional chemical composition of the deposited metal, it indicates a moisture-absorbing resistant electrode. Approved by the State Technical Supervision Bureau on July 12, 1995 and implemented on May 1, 1996
Welding rod model
E5003-X
E5010-X
E5011-X
E5015-X
E5016-X
E5018-X
E5020-X
E5027-X
E5500-X
E5503-X
E5510-x
E5511-X
E5513- XX
E5515-X
E5516-x
E5518-x
E6000-X
E6010-X
E6011-X
E6013-X
E6015-X
E6016-X
E6018-X
GB/T5118--1995
Coating type
Welding position
E50 series-deposited metal tensile strength ≥490MPa (50kgf/mm) titanium Calcium type
High cellulose sodium type
High cellulose potassium type
Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
High iron oxide type
Iron powder iron oxide type
Flat, vertical, overhead, horizontal
Flat fillet welding
Flat fillet welding
E55 series-deposited metal tensile strength ≥540MPa (55kgf/mm*) Special type
Titanium calcium type
High cellulose sodium type
High cellulose potassium type
High titanium potassium type
Low hydrogen sodium type||tt| |Low hydrogen potassium type
Iron powder low ammonia type
Flat, vertical, imperial, horizontal
E60 series-deposited metal tensile strength ≥590MPa (60.kgf/mm2) Special type
High cellulose sodium type
High cellulose potassium type
High titanium potassium type
Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Flat, vertical, imperial, horizontal
Current type
AC or DC positive and reverse connection
DC reverse connection
AC or DC reverse connection
DC reverse connection||t t||AC or DC reverse connection
AC or DC forward connection
AC or DC forward and reverse connection
AC or DC forward connection
AC or DC forward and reverse connection
AC or DC forward and reverse connection
DC reverse connection
AC or DC reverse connection
AC or DC forward and reverse connection
DC reverse connection
AC or DC reverse connection
AC or DC forward and reverse connection
DC reverse connection
AC or DC reverse connection
AC or DC forward and reverse connection
DC reverse connection
AC or DC reverse connection
AC or DC forward and reverse connection
DC reverse connection||tt ||AC or DC reverse polarity
E7010-X
E7011-X
E7013-X
E7015-X
E7016-X
E7018-X
E7515-X
E7516-X
E7518-X
E8015-X
E8016-X
E8018-x
E8515-X
E8516-X
E85 18-X
E9015-X
E9016-X
E9018-X
E10015-x
E10016-X
E10018-X
GB/T5118--1995
Continued Table 1
Coating type
Welding position
E70 series-deposited metal tensile strength ≥690MPa (70kgf/mm2)High cellulose sodium type
High cellulose potassium type
High titanium potassium type
Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Flat, vertical, overturned, horizontal
E75 series - deposited metal tensile strength ≥740MPa (75kgf/mm2) Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Flat, vertical, overturned, horizontal
E80 series - deposited metal tensile strength ≥780MPa (80kgf/mm2) Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Flat, vertical, overturned, horizontal
E85 series - deposited metal tensile strength ≥830 MPa(85kgf/mm2)Low hydrogen sodium type
Low ammonia potassium type
Iron powder low hydrogen type
Horizontal, vertical, overhead, horizontal
E90 series-deposited metal tensile strength ≥880MPa (90kgf/mm2)Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Horizontal, vertical, overhead, horizontal
E100 series-deposited metal tensile strength ≥980MPa(100kgf/mm2)Low hydrogen sodium type
Low hydrogen potassium type
Iron powder low hydrogen type
Horizontal, vertical, overhead, horizontal
Note: ①The suffix letter × represents the classification code of the chemical composition of the deposited metal, such as AI, B1, B2, etc. (see Table 2). Current type
DC reverse
AC or DC connection
AC or DC positive and reverse
DC reverse
AC or DC reverse
DC reverse
AC or DC reverse
DC reverse
AC or DC reverse
DC reverse
AC or DC reverse
DC reverse
AC or DC reverse
DC reverse
AC or DC reverse
② Meaning of Chinese characters in the welding position stack column: Ping-GB/T 5118—1995
Vertical welding, vertical welding, horizontal welding, horizontal fillet ...3 Examples of welding rod models in this standard are as follows: E
Welding rod type
E5010-A1
E5011-A1
E5003-A1
E5015-A1
E5016-A1
E5018-A1
E5020-A1
E5027-A1
Indicates the classification code of the chemical composition of the deposited metal. Indicates that the welding rod coating is iron powder low hydrogen type, and AC or DC reverse welding can be used. Indicates that the welding rod is suitable for all-position welding||tt| |Indicates the minimum tensile strength of the deposited metalIndicates the electrode
Indicates that the deposited metal contains boron (see Table 2)Indicates that the deposited metal contains tungsten (see Table 2)Indicates that the deposited metal contains vanadium (see Table 2)Indicates the chemical composition classification code of the deposited metalIndicates that the electrode coating is low-hydrogen sodium type and can be welded by DC reverse connectionIndicates that the electrode is suitable for all-position welding
Indicates the minimum tensile strength of the deposited metalIndicates the electrode
0.0350.0350.60
Welding rod model
E5500-B1
E 5503-B1
E5515-B1
E5516-B1
E5518-B1
E5515-B2
E5515-B2L
E5516-B2
E 5518-B2
E5518-B2L
E5500-B2-V
E5515-B2-V
E5515-B2-VNb
E5515-B2-VW
E550 0-B3-VWB
E5515-B3-VWB
E5515-B3-VNb
E6000-B3
E6015-B3L
E6015-B3
E6016- B3
E6018-B3
E6018-B3L
E5515-B4L
E5516-B5
.05~1.10
0.07~0.40~
GB/T 5118—1995
Continued Table 2
Chemical Composition
Chromium Molybdenum Steel Welding Rod
0.0350.035
6o.1 5~0.10~
0.70~0.400.25
1.000.20~
o.30~0.20~
jo. 20~0. 001~
2. 40~0. 70~o. 25~o. 35 ~
1. 000. 500. 65
2. 00~0. 90~
1.75~0.40~
0.40~1.00~
Welding rod model
E5515-C1
E5516-C1
E5518-C1
E5015-C1L
E5016-C1L
E5018-C1L
E5516-C2
E5518-C2
E5015-C2L
E5016-C2L
E5 018-C2L
E5515-C3
E5516-C3
E5518-C3
E5518-NM
E6015-D1
E6016-D1
E6 018-D1
E5515-D3
E5516-D3
E5518-D3
E7015-D2
E7016-D2
E7018-D2
GB/T 5118-1995
Continued Table 2
Chemical composition
Nickel steel welding rod
0.802.00~
1.250.0350.035
0.0210.03
o.0350.035
Welding rod model
EXX03-G
EXX10-G
EXX11-G
EXX13-G
EXX15-G
E XX16-G
EXX18-G
E5020-G
E6018-M
E7018-M
E7518-M
E8518-M
E85 18-M1
E5018-W
E5518-W
GB/T5118—1995
Continued Table 2
0.800.500.30≥0.200.10
0. 0150. 0120. 65
0.0250.025
1. 75 ~0. 30~0. 30 ~
0. 40~0. 20~0. 15~
0.35~0.40~~0.45~
0.0350.035
Note: ① The "X\" in the electrode model represents the different tensile strength grades of the electrode (50, 55.60, 70, 75, 80, 85, 90 and 100). ② Unless otherwise specified, the single values ​​in the table are all maximum percentages. The aluminum content of E5518-NM type electrode is not more than 0.05%. %
④EXXXX-G type welding rods only need one element to meet the requirements in the table. When there is a 40C impact performance requirement ≥54J, the welding rod model is marked as EXXXX-E.
4 Technical requirements
4.1.1 The size of the welding rod shall meet the requirements in Table 3. 359
Basic size
3.2,4.0,5.0
5.6,6.0,6.4,8.0
GB/T 5118--1995
Limit deviation
Basic size
250~350
350~450
450~700
Limit deviation
4.1.1.1 It is allowed to manufacture 2.4mm or 2.6mm diameter welding rod instead of 2.5mm diameter, 3.0mm diameter welding rod instead of 3.2mm diameter, 4.8mm diameter welding rod instead of 5.0mm diameter, 5.8mm diameter welding rod instead of 6.0mm diameter welding rod. 4.1.1.2 According to the requirements of the purchaser, it is allowed to supply welding rods of other sizes through agreement. 4.1.2 The length of the electrode clamping end shall comply with the provisions of Table 4. Electrode diameter
4.2 Coating
Length of the clamping end
4.2.1 The welding core and coating shall not have defects that affect the quality of the welding rod. 4.2.2 The coating of the arc-starting end of the welding rod shall be chamfered and the end face of the welding core shall be exposed to ensure easy arc starting. The exposed core of the welding rod shall comply with the following provisions: For EXX15-X, EXX16-X and EXX18-X welding rods, the exposed core length along the length direction shall not exceed one-half of the welding core diameter a.
or 1.6mm, whichever is smaller. For other types of welding rods, the exposed core length along the length direction shall not exceed two-thirds of the welding core diameter or 2.4mm, whichever is smaller. b.
The exposed core along the circumferential direction of welding rods of various diameters shall not exceed half of the circumference. 4.2.3 The eccentricity of the welding rod shall comply with the following provisions: b. For welding rods with a diameter of not more than 2.5 mm, the eccentricity shall not be greater than 7%. b.
For welding rods with a diameter of 3.2 mm and 4.0 mm, the eccentricity shall not be greater than 5%. For welding rods with a diameter of not less than 5.0 mm, the eccentricity shall not be greater than 4%. The eccentricity calculation method is as follows (see Figure 1): T, T
Eccentricity of welding rod = Yuan/2× 100%
Where: Ti
Maximum thickness of the coating layer of the welding rod section + diameter of the welding core, mm; -Minimum thickness of the coating layer of the same section + diameter of the welding core, mm. (1)
GB/T5118—1995
4.3 T-joint fillet weld
4.3.1 The surface of the fillet weld shall be free of cracks, weld bumps, slag inclusions and surface pores after visual inspection. Individual short undercuts with a depth of less than 1 mm are permitted.
4.3.2 The leg dimensions of fillet welds shall comply with the requirements of Table 5. The convexity of convex fillet welds and the difference between the two leg lengths of fillet welds shall comply with the requirements of Table 6.
The two longitudinal fracture surfaces of fillet welds shall be free of cracks after visual inspection. The total length of unfused weld root shall not exceed 20% of the total weld length 4.3.3
, and the length of continuous unfused weld shall not exceed 25mm. Fillet weld tests do not inspect internal pores. Table 5
Welding rod model
EXX10-X
EXx11-x
EXX00-X
ExX03-X
EXX13-X
ExX15-X
EXX16-X
Welding rod diameter
Thickness T
Test plate size
Minimum length L||tt ||Welding position
Vertical, overhead
Vertical, overhead
Weld leg size
Electrode model
EXX18-X
E5020-X
E5027-X
Electrode diameter
5.66.06.4
Actual weld leg size
4.4 Chemical composition of deposited metal
GB/T 5118—1995
Continued Table 5
Test plate size
Thickness T
Convexity, not more than
The chemical composition of the deposited metal shall comply with the provisions of Table 2. 4.5 Mechanical properties
Minimum length L
4.5.1 The results of the deposited metal tensile test shall comply with the provisions of Table 7. 4.5.2 The results of Charpy V-notch impact test of weld metal shall comply with the requirements of Table 8. 4.6 Radiographic flaw detection of welds
Radiographic flaw detection of welds shall comply with the requirements of Table 9.
4.7 Water content of coating or diffusible hydrogen content of deposited metal The water content of coating or diffusible hydrogen content of deposited metal shall comply with the requirements of Table 10 or Table 11. 362
Welding position
Vertical, overhead
Weld leg size
The difference between the lengths of the two weld legs shall not exceed
Electrode model
E5003-X
E5010-X
E5011-X
E5015-X
E5016-X
E5018-X
E5020-X
E5027-X
E5500-x
E5503-X
E5510-X
E5511-X
E5513-X
E5515-x
E55 16-X
E5518-X
E5516-C3
E5518-C3
E6000-X||tt ||E6010-X
E6011-x
E6013-X
E6015-X
E6016-X|| tt||E6018-X
E6018-M
E7010-X
E7011-x
E7013- x
E7015-X
E7016-Xwww.bzxz.net
E7018-X
E7018-M
GB/T 5118—1995
Tensile strength
MPa(kgf/mm*)
49050)
540(55)
540(55)
590（60)
690(70)
Yield point or yield strength
a.or oo.2
MPa(kgf/mm*)
390(4 0)
440（45)
440(45)
440~540(45~55)
490（50)
590(60)
Elongation
Electrode model
E7515-X
E7516-X
E7518-X
E7518-M
E8015-X
E8016-x
E8018-X
E8515-X
E8516-X
E8518-x
E8518-M
E8518-M1
E9015-X
E9016-X
E9018-X
E10015-X
E10016 -X
E10018-X
GB/T5118—1995
Table 7 continued
Tensile strength
MPa(kgf/mm*)
740(75)
780(80)
830(85)
880(90)
980(100)
Note: ①The single values ​​in the table are all minimum values. Service point or cancer service strength
MPa(kgf/mm2)
640(65)
690(70)
740(75)
780(80)
880(90)
②The service strength of E50xX-X type after welding is not less than 410MPa(（42kgf/mm2）. Elongation
③The tensile strength of E8518-M1 type welding rod is generally not less than 830MPa（85kgt/mm）. If the supply and demand parties reach an agreement, it can also be an exception.④The welding rod model with additional chemical components should comply with the corresponding mechanical properties without additional chemical components.?The yield strength of E55XX-B3-VWB type welding rod is not less than 340MPa（35kgf/mm）.3647 Moisture content of flux coating or diffusible hydrogen content of deposited metal The moisture content of flux coating or diffusible hydrogen content of deposited metal shall comply with the requirements of Table 10 or Table 11. 362
Welding position
Vertical, overhead
Weld leg size
The difference between the lengths of the two weld legs shall not exceed
Electrode model
E5003-X
E5010-X
E5011-X
E5015-X
E5016-X
E5018-X
E5020-X
E5027-X
E5500-x
E5503-X
E5510-X
E5511-X
E5513-X
E5515-x
E55 16-X
E5518-X
E5516-C3
E5518-C3
E6000-X||tt ||E6010-X
E6011-x
E6013-X
E6015-X
E6016-X|| tt||E6018-X
E6018-M
E7010-X
E7011-x
E7013- x
E7015-X
E7016-X
E7018-X
E7018-M
GB/T 5118—1995
Tensile strength
MPa(kgf/mm*)
49050)
540(55)
540(55)
590（60)
690(70)
Yield point or yield strength
a.or oo.2
MPa(kgf/mm*)
390(4 0)
440（45)
440(45)
440~540(45~55)
490（50)
590(60)
Elongation
Electrode model
E7515-X
E7516-X
E7518-X
E7518-M
E8015-X
E8016-x
E8018-X
E8515-X
E8516-X
E8518-x
E8518-M
E8518-M1
E9015-X
E9016-X
E9018-X
E10015-X
E10016 -X
E10018-X
GB/T5118—1995
Table 7 continued
Tensile strength
MPa(kgf/mm*)
740(75)
780(80)
830(85)
880(90)
980(100)
Note: ①The single values ​​in the table are all minimum values. Service point or cancer service strength
MPa(kgf/mm2)
640(65)
690(70)
740(75)
780(80)
880(90)
②The service strength of E50xX-X type after welding is not less than 410MPa(（42kgf/mm2）. Elongation
③The tensile strength of E8518-M1 type welding rod is generally not less than 830MPa（85kgt/mm）. If the supply and demand parties reach an agreement, it can also be an exception.④The welding rod model with additional chemical components should comply with the corresponding mechanical properties without additional chemical components.?The yield strength of E55XX-B3-VWB type welding rod is not less than 340MPa（35kgf/mm）.3647 Moisture content of flux coating or diffusible hydrogen content of deposited metal The moisture content of flux coating or diffusible hydrogen content of deposited metal shall comply with the requirements of Table 10 or Table 11. 362
Welding position
Vertical, overhead
Weld leg size
The difference between the lengths of the two weld legs shall not exceed
Electrode model
E5003-X
E5010-X
E5011-X
E5015-X
E5016-X
E5018-X
E5020-X
E5027-X
E5500-x
E5503-X
E5510-X
E5511-X
E5513-X
E5515-x
E55 16-X
E5518-X
E5516-C3
E5518-C3
E6000-X||tt ||E6010-X
E6011-x
E6013-X
E6015-X
E6016-X|| tt||E6018-X
E6018-M
E7010-X
E7011-x
E7013- x
E7015-X
E7016-X
E7018-X
E7018-M
GB/T 5118—1995
Tensile strength
MPa(kgf/mm*)
49050)
540(55)
540(55)
590（60)
690(70)
Yield point or yield strength
a.or oo.2
MPa(kgf/mm*)
390(4 0)
440（45)
440(45)
440~540(45~55)
490（50)
590(60)
Elongation
Electrode model
E7515-X
E7516-X
E7518-X
E7518-M
E8015-X
E8016-x
E8018-X
E8515-X
E8516-X
E8518-x
E8518-M
E8518-M1
E9015-X
E9016-X
E9018-X
E10015-X
E10016 -X
E10018-X
GB/T5118—1995
Table 7 continued
Tensile strength
MPa(kgf/mm*)
740(75)
780(80)
830(85)
880(90)
980(100)
Note: ①The single values ​​in the table are all minimum values. Service point or cancer service strength
MPa(kgf/mm2)
640(65)
690(70)
740(75)
780(80)
880(90)
②The service strength of E50xX-X type after welding is not less than 410MPa(（42kgf/mm2）. Elongation
③The tensile strength of E8518-M1 type welding rod is generally not less than 830MPa（85kgt/mm）. If the supply and demand parties reach an agreement, it can also be an exception.④The welding rod model with additional chemical components should comply with the corresponding mechanical properties without additional chemical components.?The yield strength of E55XX-B3-VWB type welding rod is not less than 340MPa（35kgf/mm）.364
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.