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Industry：
GB Base MetalWelding MethodProduct MarkStandardCharacteristics and Applications
Q345qE
Q370qE		Shielded Metal Arc Welding

JL-E507Ni

GB/T 5117 E5015-N1

AWS A5.5 E7015-G

ISO 2560-B-E4915-G AP

It is suitable for manual arc welding of 500 MPa grade bridge steel.
Submerged Arc WeldingJL-W10Mn2Ni/JL-SJ101NHGB/T 5293 S49A4U FB-SU35
AWS A5.17 F7A4-EG		It is suitable for submerged arc welding of 500 MPa grade bridge steel.
Active Gas Shielded Arc Welding

JL-G70S-G

GB/T 8110 G49A4U M21ZSNCC2
AWS A5.18 ER70S-G		It is suitable for gas shielded welding of 500 MPa grade bridge steel.
Flux-Cored Arc WeldingJL-YJ711NiGB/T 10045 T49 4 T1-1 C1 A U

AWS A5.20 E71T-1C-J

ISO 17632-A-T42 4 P C1 1

It is suitable for gas shielded welding of 500 MPa grade bridge steel.
Q420qE
Q460qE		Shielded Metal Arc Welding

JL-E557Ni

GB/T 5117 E5515-G

AWS A5.5 E8015-G

ISO 2560-B-E5515-GA

It is suitable for manual arc welding of 550 MPa grade bridge steel.
Submerged Arc WeldingJL-WEG-G/JL-SJ102NHGB/T 5293 S55A4 FB-SU35
AWS A5.23M F55A4-EG-G		It is suitable for submerged arc welding of 550 MPa grade bridge steel.
Active Gas Shielded Arc WeldingJL-TH500NQ-IIGB/T 8110 G55A4U M21ZSNCC1
AWS A5.28 ER80S-G		It is suitable for gas shielded welding of 550 MPa grade bridge steel.
Flux-Cored Arc WeldingJLF-81K2UGB/T 10045 T55 4 T1-1 C1 A-N3
AWS A5.29 E81T1-K2C		It is suitable for gas shielded welding of 550 MPa grade bridge steel.
Q500qEShielded Metal Arc WeldingJL-J607GB/T 32533 E5915-G
AWS A5.5 E9015-G		It is suitable for manual arc welding of 620 MPa grade bridge steel.
Submerged Arc WeldingJL-WEG-G/JL-SJ102NHAWS A5.23 MF62A4-EG-GIt is suitable for submerged arc welding of 620 MPa grade bridge steel.
Active Gas Shielded Arc Welding

JL-G90S-G

GB/T 8110 G62A4U M21 NZM2T
AWS A5.28 ER90S-G		It is suitable for gas shielded welding of 620 MPa grade bridge steel.
Flux-Cored Arc WeldingJL-F91K2CGB/T 36233 T62 4 T1-1 C1 A-N3M1 U

AWS A5.29 E91T1-K2C

ISO 18276-B-T624T1-1C1A -N3M1 U

It is suitable for gas shielded welding of 620 MPa grade bridge steel.
Q345qE
Q370qE		Shielded Metal Arc Welding

JL-E506NiCrCu

GB/T 5117 E5016-G
AWS A5.5 E7016-G
ISO 2560-B-E4916-G A		It is a low-alloy steel welding electrode with a low-hydrogen potassium-type alkaline coating, suitable for both alternating and direct current, enabling all-position welding. The weld metal exhibits excellent atmospheric corrosion resistance, crack resistance, and good plasticity and toughness. It is suitable for welding 50-kilogram-grade weathering steels, such as weathering steel vehicles, as well as low-alloy steels containing chromium-aluminum and copper-chromium-nickel.
Submerged Arc WeldingJL-W500NQ-III/JL-SJ101NH

TB/T 2374 TH550-NQ-II

GB/T 8110 ER55-1

ISO 14341-B-G 55A 4 M SNCC

It is a submerged arc welding wire for weathering steel, with excellent weldability, easy deslagging, and good shape formation. lt is suitable for welding weathering steels with a tensile strength grade of 550 MPa, such as Q450NQR1. Its primary applications are in locomotives and rolling stock, as well as construction machinery.
Active Gas Shielded Arc WeldingJL-TH500-NQ-IIGB/T 8110 G49A4UM21SNCC2It is a 500MPa-grade low-alloy weathering steel welding wire containing appropriate amounts of alloying elements such as chromium, nickel, and copper, imparting excellent atmospheric corrosion resistance to the weld. It is used for welding Q400NQR1 and 500MPa-grade atmospheric corrosion-resistant structures, applicable in industries including construction machinery, bridges, containers, and locomotive and rolling stock manufacturing.
Flux-Cored Arc WeldingJL-F501NiCrCuGB/T 10045 T49 4 T1-1 C1 A-NCC2
AWS A5.29 E71T1-GC		This is a rutile slag-type CO₂ gas-shielded weathering steel flux-cored welding wire. It exhibits excellent welding performance with stable arc, less spatter, easy deslagging, and good shape formation of the weld seam, and is suitable for all-position welding. The weld metal possesses good plasticity, low-temperature toughness, and excellent atmospheric corrosion resistance. It is suitable for welding weathering steels of the same grade in bridges, buildings, locomotives, and rolling stock.
Q420qE
Q460qE		Shielded Metal Arc Welding

JL-E566NiCrCu

GB/T 5117 E5516-G
AWS A5.5 E8016-G		It is a fine-grain steel welding electrode specifically used for weathering steel. Featuring an alkaline coating, it is suitable for all-position welding with both AC and DC reverse polarity. It offers excellent welding performance with less spatter, easy deslagging, and good shape formation. The deposited metal exhibits good mechanical properties and is suitable for welding weathering steels such as Q450N and QR1.
Submerged Arc WeldingJL-W550NQ-III/JL-SJ101NHTB/T 2374 TH550-NQ-IIIt is a submerged arc welding wire for weathering steel, featuring excellent weldability, easy deslagging, and good shape formation of the weld seam. It is suitable for welding weathering steels with a tensile strength grade of 550 MPa, such as Q450NQR1. Its primary applications are in locomotives and rolling stock, as well as construction machinery.
Active Gas Shielded Arc WeldingJL-TH550-NQ-IIGB/T 8110 G55A4UM21SNCC1It is a 550MPa-grade low-alloy weathering steel welding wire containing appropriate amounts of alloying elements such as chromium, nickel, and copper, imparting excellent atmospheric corrosion resistance to the weld. It is used for welding Q450NQR1 and 550MPa-grade atmospheric corrosion-resistant steel structures, applicable in industries including construction machinery, bridges, containers, and locomotive and rolling stock manufacturing.
Flux-Cored Arc WeldingJL-F551NiCrCuGB/T 10045 T55 4 T1-1 C1 A-NCC2
AWS A5.29 E81T1-GC		It is a rutile slag-type CO₂ gas-shielded weathering steel flux-cored welding wire. It offers excellent welding performance with stable arc, less spatter, easy deslagging, and good shape formation, suitable for all-position welding. The weld metal exhibits good plasticity and low-temperature toughness and is suitable for welding 550MPa-grade high-strength steel structures and weathering steel structures.
Q500qEShielded Metal Arc Welding

JL-E607NiCrCu

GB/T 32533 E5916-G
AWS A5.5 E9016-G		It is an alkaline coating weathering steel welding electrode suitable for both AC and DC welding. It offers excellent welding performance with less spatter, easy deslagging, and good shape formation in the weld seam, delivering good mechanical properties. It is suitable for welding weathering steels such as Q500NQR1.
Submerged Arc WeldingJL-W62NH/JL-SJ102NHAWS A5.23 EGIt is a submerged arc welding wire for weathering steel, featuring excellent weldability, easy deslagging, and good shape formation of the weld seam. lt is suitable for welding base metals with a tensile strength grade of 620 MPa, primarily used in the bridge industry.
Active Gas Shielded Arc Welding

JL-E90S-G

GB/T 39281 G62A4 M21 N2M2T

AWS A5.28 ER90S-G

ISO  16834-BG69A4 M21 GN2M2T


It is a copper-coated gas-shielded welding wire specifically used for Q500qE bridge steel. It offers excellent welding processability, good molten pool fluidity, and good shape formation. The welds exhibit superior low-temperature impact toughness and crack resistance. It is used with argon-rich gas for welding bridge steel of the same strength grade, such as Q500qE, and can also be used for welding structural steels of corresponding grades.
Flux-Cored Arc WeldingJL-F621NiCrCuGB/T 36233 T62 4 T1-1 C1 A-N3M1

AWS A5.29 E91T1-K2C-J

IS0 18276-B-T624T1-1C1A-N3M1

It is rutile slag-type CO₂ gas-shielded weather-resistant steel flux-cored welding wire. It offers excellent welding performance with stable arc, less spatter, easy deslagging, and good shape formation of the weld seam, suitable for all-position welding. It is suitable for welding 620MPa-grade high-strength steel structures and is widely used in welding steel structures for ships, machinery manufacturing, containers, petrochemical plants, bridges, and other applications.

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