Ever wondered what those numbers and letters on welding rods mean? This article demystifies the coding system for carbon and stainless steel welding rods, helping you understand their tensile strength, welding positions, and coating types. Get ready to enhance your welding knowledge and make informed choices for your projects!
The E in carbon steel welding rod designations signifies an electrode, while the subsequent digits provide critical information about its properties and application. The first two digits indicate the minimum tensile strength of the deposited weld metal in ksi (1,000 psi). The third digit specifies the welding position capabilities, such as flat, horizontal, vertical, or overhead. The combination of the third and fourth digits denotes both the type of welding current (AC, DC, or both) and the type of electrode coating (e.g., cellulosic, rutile, basic).
For stainless steel welding rods, the designation system differs slightly. The E again represents an electrode, followed by a three-digit number representing the alloy classification based on the chemical composition of the deposited metal. The two digits after the hyphen provide information on the coating type, recommended welding positions, and suitable welding current types.
These standardized designation systems enable welders to quickly identify the appropriate electrode for specific applications, ensuring optimal weld quality and performance. For comprehensive details on electrode classifications, including specific alloy compositions and performance characteristics, refer to the Chinese national standards GB5117 for carbon steel electrodes and GB983 for stainless steel electrodes. These standards align with international norms while addressing specific requirements for the Chinese welding industry.
| No. | Grade | Model | ||||
| GB | AWS | JIS | DIN | |||
| E43 Series – Tensile Strength of Deposited Metal≥420Mpa(43kgf/mm2) | ||||||
| 1 | CHE40 | J421 | E4313 | E6013 | D4313 | E4332 R3 |
| 2 | CHE420T | J420G | E4300 | |||
| 3 | CHE421 | J421 | E4313 | E6013 | D4313 | E4332 R3 |
| 4 | CHE421Fe16 | J421Fe16 | E4324 | E6024 | ||
| 5 | CHE421Fe18 | J421Fe18 | E4324 | E6024 | ||
| 6 | CHE421D | J421X | E4313 | E6010 | D4313 | E4333R (C) 3 |
| 7 | CHE42 | J422 | E4303 | E6019 | D4303 | |
| 8 | CHE422 | J422 | E4303 | D4303 | ||
| 9 | CHE423 | J423 | E4301 | D4301 | ||
| 10 | CHE424 | J424 | E4320 | E6020 | D4320 | E4354AR11160 |
| 11 | CHE424Fe16 | J424Fe16 | E4327 | E6027 | D4327 | E4354AR11160 |
| 12 | CHE425 | J425 | E4311 | E6011 | D4311 | |
| 13 | CHE425G | J425G | E4310 | E6010 | ||
| 14 | CHE425GX | J425G | E4310 | E6010 | E4343C4 | |
| 15 | CHE426 | J426 | E4316 | E6016 | D4316 | E4343B10 |
| 16 | CHE47 | J427 | E4315 | |||
| 17 | CHE427 | J427 | E4315 | |||
| 18 | CHE427T | J427X | E4315 | |||
| E50 Series – Tensile Strength of Deposited Metal≥490Mpa(50kgf/mm2) | ||||||
| 1 | CHE501Fe | J501Fe | E5014 | E7014 | E4321AR11120 | |
| 2 | CHE501Fe16 | J501Fe16 | E5024 | E7024 | E5142RR11160 | |
| 3 | CHE502 | J502 | E5003 | D5003 | ||
| 4 | CHE503 | J503 | E5001 | |||
| 5 | CHE505 | J505 | E5011 | E7011-A1 | ||
| 6 | CHE505G | E5010 | E7010-A1 | |||
| 7 | CHE505GX | E5010 | E7010-A1 | |||
| 8 | CHE56 | J506 | E5016 | E7016 | D5016 | E5154B (R) 10 |
| 9 | CHE506 | J506 | E5016 | E7016 | D5016 | E51431310 |
| 10 | CHE50 | J507 | E5015 | E7015 | ||
| 11 | CHE507 | J507 | E5015 | E7015 | E51551310 | |
| 12 | CHE507T | J507X | E5015 | E7015 | E51551310 | |
| 13 | CHE507Fe16 | J507Fe16 | E5028 | E7028 | D5026 | E5155B (R) /2160 |
| 14 | CHE58-1 | E5018-1 | E7018-1 | D5016 | E5154B (R) 10 | |
| 15 | CHE508-1 | E5018-1 | E7018-1 | E5154B10 | ||
| 16 | CHE508 | E5018 | E7018 | D5016 | E5153B10 | |
| 17 | CHE508T | E5048 | E7048 | |||
Please refer to: GB/T 5117-1995 “Carbon Steel Electrodes for Shielded Metal Arc Welding.
Comparison of Old and New Designations for Commonly Used Carbon Steel Welding Rods and Their Applicable Scope:
| National Standards GB980-77 | National Standards GB5117-95 | Using Power Supply | Drying Temperature and Time (℃×h) | Suitable for welding steel materials. |
| J421 | E4320 | Direct Connection of Alternating or Direct Current | 150—200×1 | Flat welding and angle welding of A3, Q235A, Q235F, 10, 20 steel |
| J422 | E4303 | Direct Connection of Alternating or Direct Current | 150—200×1 | A3, Q235A, Q235F, 10, 20 |
| J423 | E4301 | Direct Connection of Alternating or Direct Current | 150—200×1 | A3, Q235A, Q235F, 10, 20 |
| J427 | E4315 | Reverse Connection of Direct Current | 350—400×2 | Q235B, C, D, 20R, 20g |
| J502 | E5003 | Direct Connection of Alternating or Direct Current | 150—200×1 | Q295, Q345, 16Mn, etc. |
| J506 | E5016 | Reverse Connection of Direct Current or Alternating Current | 350—400×2 | Q295, Q345, 16Mn, 16MnR, etc. |
| J507 | E5015 | Reverse Connection of Direct Current | 350—400×2 | Q295, Q345, 16Mn, 16MnR, etc. |
Low Alloy Steel Welding Rod:
| No | Grade | GB | AWS | JIS | DIN | |
| 1 | CHE502WCu | J502Wcu | TBE5003-G | |||
| 2 | CHE505Mo | E5010-A1 | E7010-A1 | |||
| 3 | CHE506NiLH | E5016-G | E7016-G | |||
| 4 | CHE506WCu | J506Wcu | TBE5016-G | |||
| 5 | CHE507NiLH | E5015-G | E7015-G | |||
| 6 | CHE507RH | E5015-G | ||||
| 7 | CHE507CuP | J507CuP | E5015-G | E7015-G | ||
| 8 | CHE507MnMo | E5015-G | E7015-G | |||
| 9 | CHE507CrNi | J507CrNi | E5015-G | E7015-G | ||
| 10 | CHE507GX | |||||
| 11 | CHE508Ni | E5018-G | E7018-G | |||
| 12 | CHE555GX | E5510-G | E8010-P1 | |||
| 13 | CHE557 | J557 | E5515-G | E8015-G | D5316 | EY5066NiMoBH5 |
| 14 | CHE557MoV | J557MoV | E5515-G | E8015-G | D5316 | EY5066NiMoBH5 |
| 15 | CHE557GX | |||||
| 16 | CHE558GX | |||||
| 17 | CHE62CFLH | E6015-G | E9015-G | D5816 | E55548XXH5 | |
| 18 | CHE606 | J606 | E6016-D1 | E9016-G | D5816 | E55548XXH5 |
| 19 | CHE607 | J607 | E6015-D1 | E9015-G | D5816 | DY5554BXXH5 |
| 20 | CHE607Ni | J607Ni | E6015-G | E9015-G | D5816 | EY5554BXXH5 |
| 21 | CHE607GX | |||||
| 22 | CHE707 | J707 | E7015-D2 | E10015-G | D7016 | EY624BXXH5 |
| 23 | CHE707MnMo | E7015-G | E10015-G | D7016 | EY624BXXH5 | |
| 24 | CHE707Ni | J707Ni | E7515-G | E10015-G | D7016 | EY624BXXH5 |
| 25 | CHE757 | J757 | E7517-G | E11015-G | D7016 | EY6924BXXH15 |
| 26 | CHE758 | E7518-G | E11018-G | |||
| 27 | CHE80C | E8015-G | E12015-G | |||
| 28 | CHE857 | J857 | E8515-G | E12015-G | EY7953BXXH15 | |
| 29 | CHE857Cr | J857Cr | E8515-G | E12015-G | EY7953BXXH15 | |
| 30 | CHE857CrNi | J857CrNi | E8515-G | E12015-G | EY7953BXXH15 | |
| 31 | CHE858 | E8518-G | E12018-G | |||
| 32 | CHH107 | R107 | E5015-A1 | E7015-A1 | DT1216 | EMoB10+ |
| 33 | CHH108 | E5018-A1 | E7018-A1 | |||
| 34 | CHH202 | R202 | E5503-B1 | |||
| 35 | CHH207 | R207 | E5518-B1 | E8015-B1 | ||
| 36 | CHH307 | R307 | E5515-B2 | E8015-B2 | DT2315 | ECrMolB10+ |
| 37 | CHH308 | E5515-B2 | E8018-B2 | |||
| 38 | CHH317 | R317 | E5515-B2-V | E8016-B2 | DT2315 | |
| 39 | CHH327 | R327 | E5515-B2-VW | |||
| 40 | CHH337 | R337 | E5515-B2-VNb | |||
| 41 | CHH347 | R347 | E5515-B3-VWB | |||
| 42 | CHH347A | |||||
| 43 | CHH407 | R407 | E6015-B3 | E9015-B3 | DT2415 | EcCrMo2B10+ |
| 44 | CHH417 | R417 | E5515-B3-VNb | |||
| 45 | HL107 | W107 | E5015-C2L | E7015-C2L | ||
| 46 | HL707 | W707 | E5515-Cl | E8015-C1 | ||
| 47 | HL907 | E7015-G | ||||
Comparison of old and new model numbers of alloy steel welding rods, and their application scope:
| National Standards GB982-77 | National Standards GB5118-95 | Drying | Suitable for welding steel materials. |
| R102 | E5003-A1 | 150～200℃×1 h | Preheat 15Mo to 90-110°C, then temper at 605-635°C. |
| R107 | 350℃×1 h | ||
| R202 | E5503-B1 | 150～200℃×1 h | Preheat 12CrMo to 150-200°C, then temper at 605-635°C. |
| R207 | 350℃×1 h | ||
| R302 | E5503-B2 | 150～200℃×1 h | Preheat 15CrMo at 160-200℃, temper at 675-705℃. |
| R307 | E5515-B2 | 350℃×1 h | |
| R312 | E5503-B2-V | 200℃×1 h | Preheat 12CrMoV at 250-300℃, temper at 715-745℃. |
| R317 | E5515-B2-V | 350℃×1 h | |
| R327 | E5515-B2-VW | Preheat 15CrMoV to 250-300℃, then temper at 715-745℃. | |
| R337 | E5515-B2-VNb | ||
| R402 | E6003-B3 | 200℃×1 h | Preheat 12Cr2Mo at 160-200℃, temper at 675-705℃. |
| R407 | E6015-B3 | 350℃×1 h | |
| R417 | E5515-B3-VNb | Preheat 12Cr3Mo3SiTiB at 200-300℃, then temper at 715-745℃. | |
| R507 | E15MoV-15 | Cr5Mo should be preheated at 300 to 400 degrees Celsius, followed by tempering treatment at 740 to 760 degrees Celsius. | |
| R707 | E9Mo-15 | Cr5Mo should be preheated at 300 to 400℃, and then tempered at 730 to 750℃. | |
| R802 | E11MoVNi-16 | 1Cr11MoV should be preheated at 300-400°C, then tempered at 730-750°C. | |
| R807 | E11MoVNi-15 | ||
| R817 | E11MoVNiW-15 | Cr11MoNiVW should be preheated at 350-450℃, and then undergo tempering treatment at 730-750℃. | |
| R827 | Cr11MoNiV; Preheat Cr11MoV at 350 to 450℃, then temper at 730 to 750℃. |
Description: E5003-A1 – Carbon Molybdenum Steel; E5503-B1, B2, B3 – Increased Chromium content, Chromium Molybdenum Steel; E5515-C2, C2, C3 – Increased Nickel content, Nickel Steel; E5518-NM – Nickel Molybdenum Steel; W6015-D1, D2, D3 – Increased Manganese content, Manganese Molybdenum Steel; E××10-G, E××03-G, etc.: Other low alloy steel welding rods.
| No | Grade | GB | AWS | JIS | DIN | |
| 1 | CHH507 | R507 | E5MoV-15 | E502-15 | DT2516 | EkbCrMo520+ |
| 2 | CHH707 | R707 | E9Mo-15 | E505-15 | EkbCrMo920+ | |
| 3 | CHH807 | R807 | E11MoVNi-15 | |||
| 4 | CHK202 | G202 | E410-16 | E410-16 | D410 | E13B20+ |
| 5 | CHK207 | G207 | E410-15 | E410-15 | E13B20+ | |
| 6 | CHK232 | E410NiMo-16 | E410NiMo-16 | |||
| 7 | CHK307 | G307 | E430-15 | E430-15 | D430 | E17B20+ |
| 8 | CHS002 | A002 | E308L-16 | E308L-16 | D308L | E199ncR23 |
| 9 | CHS002A | E308L-15 | E308L-15 | |||
| 10 | CHS012Si | A012Si | ||||
| 11 | CHS022 | A022 | E316L-16 | E316L-16 | D316L | E19123ncR26 |
| 12 | CHS022N | E316L-16 | E316L-16 | D316L | E19123ncR26 | |
| 13 | CHS022Si | A022Si | ||||
| 14 | CHS032 | A032 | E317MoCuL-16 | E317L-16 | ||
| 15 | CHS042 | A042 | E309MoL-16 | E309MoL-16 | ||
| 16 | CHS052 | A052 | ||||
| 17 | CHS052Cu | |||||
| 18 | CHS062 | A062 | E309L-16 | E309L-16 | ||
| 19 | CHS062A | E309L-15 | E309L-15 | |||
| 20 | CHS102 | A102 | E308-16 | E308-16 | D308-16 | E199R26 |
| 21 | CHS107 | A107 | E308-15 | E308-15 | E199B26 | |
| 22 | CHS122 | A122 | ||||
| 23 | CHS132 | A132 | E347-16 | E347-16 | D347-16 | E199NbR26 |
| 24 | CHS137 | A137 | E347-15 | E347-15 | D347-15 | E199NbB26 |
| 25 | CHS157Mn | |||||
| 26 | CHS202 | A202 | E316-16 | E316-16 | D316 | E19123R26 |
| 27 | CHS207 | A207 | E316-15 | E316-15 | E19123B20+ | |
| 28 | CHS212 | A212 | E318-16 | E318-16 | E19123NbR26 | |
| 29 | CHS222 | A222 | E317MoCu-16 | E316Cu-16 | ||
| 30 | CHS232 | A232 | E318V-16 | |||
| 31 | CHS237 | A237 | E318V-15 | |||
| 32 | CHS302 | A302 | E309-16 | E309-16 | D309-16 | E2312R26 |
| 33 | CHS307 | A307 | E309-15 | E309-15 | D309-15 | E2212B20+ |
| 34 | CHS312 | A312 | E309Mo-16 | E309Mo-16 | D309Mo-16 | E2312R26 |
| 35 | CHS402 | A402 | E310-16 | E310-16 | D310-16 | E2520R26 |
| 36 | CHS407 | A407 | E310-15 | E310-15 | D310-15 | E2520B26 |
| 37 | CHS412 | A412 | E310Mo-16 | E310Mo-16 | D310Mo-16 | |
| 38 | CHS437 | E310H-15 | B.S:25.20H | |||
| 39 | CHS502 | A502 | E16-25MoN-16 | E16-8-2-16 | D16-8-2 | |
| 40 | CHS507 | A507 | E16-25MoN-15 | E16-8-2-15 | D16-8-2 | |
| 41 | CHS29.9 | E312-16 | E312-16 | D312 | ||
| 42 | CHS29.9Co | |||||
| 43 | CHS2209 | E2209-16 | E2209-16 | |||
Comparison of old and new models of stainless steel welding rods and their application range:
| National Standards GB983-77 | National Standards GB983-85 | National Standards GB983-95 | Drying | Suitable for welding steel materials |
| A002 | E00-19-10-16 | E308L-16 | 150℃×1 h | 0Cr19Ni10; 0Cr19Ni11Ti; |
| A022 | E00-18-12Mo-16 | E316L-16 | 00Cr17Ni14 Mo2 | |
| A032 | E00-19-13Mo2-Cu2-16 | E317 Mo-CuL-16 | 0Cr18Ni12Mo2Cu2 | |
| A042 | E00-23-13Mo2-16 | E309 Mo L-16 | 00Cr23Ni13Mo2 | |
| A062 | E00-23-13-16 | E309 L-16 | 00Cr23Ni13 | |
| A101 | E0-19-10-16 | E308-16 | 1Cr19Ni9; Cr19Ni10; 0Cr19Ni11 | |
| A102 | E0-19-10-16 | E308-16 | 0Cr19Ni9; 0Cr19Ni11Ti | |
| A107 | E0-19-10-15 | E308-15 | 250℃×1 h | 0Cr19Ni9 |
| A132 | E0-19-10Nb-16 | E347-16 | 150℃×1 h | Cr19Ni11Ti |
| A137 | E0-19-10Nb-15 | E347-15 | 250℃×1 h | 0Cr19Ni11Ti |
| A201 | E0-18-12Mo2-16 | E316-16 | 250℃×1 h（Prohibit repeated baking.） | 0Cr18Ni12Mo2 |
| A202 | E0-18-12Mo2-16 | E316-16 | 150℃×1 h | 0Cr18Ni12Mo2 |
| A207 | E0-18-12Mo2-15 | E316-15 | 250℃×1 h | 0Cr18Ni12Mo2; Cr13; Cr17 |
| A242 | E0-19-13Mo3-16 | E317-16 | 150℃×1 h | Cr19Ni13Mo3 |
| A302 | E1-23-13-16 | E309-16 | Cr23Ni13 | |
| A307 | E1-23-13-15 | E309-15 | 250℃×1 h | Cr23Ni13 |
| A312 | E1-23-13Mo2-16 | E309 Mo -16 | 150℃×1 h | Cr23Ni13Mo2 |
| A402 | E2-26-21-16 | E310 -16 | Cr25Ni20 | |
| A407 | E2-26-21-15 | E310 -15 | 250℃×1 h | Cr25Ni20 |
| A412 | E1-21-21Mo2-16 | E310Mo -16 | 150℃×1 h | Cr26Ni21Mo2 |
| A422 | Cr25Ni20Si2 |
Description: 15, 25 – Alkaline, direct current reversed polarity; 16, 17, 26 – Titanium calcium type, alternating current or direct current reversed polarity.
| No | Grade | GB | AWS | JIS | |
| 1 | CHC100 | Z100 | |||
| 2 | CHC | Z | |||
| 3 | CHC208 | Z208 | EZC | ||
| 4 | CHC308 | Z308 | EZNi-1 | ENi-CI | DECNi |
| 5 | CHC408 | Z408 | EZNiFe-1 | ENiFe-CI | DFCNiFe |
| 6 | CHC508 | Z508 | EZNiCu-1 | ENiCu-B | DFCNiCu |
Comparison of old and new model numbers for low temperature steel welding rods and their application range
| National Standards GB982-77 | National Standards GB5118-95 | Drying | Suitable for welding steel materials. |
| W707 | 350℃×1 h | 09Mo2V; 09MnTiCuXi | |
| W707Ni | E5515-C1 | 09Mo2V; 16MnVAl; 3.5Ni Steel, etc. | |
| W907Ni | E5515-C2 | 3.5Ni steel should be preheated to 150℃, then tempered at a temperature range of 600-650℃. | |
| W107Ni | 06AlNbCuN;16MnNb; 3.5Ni steel |
| No | Grade | Welding Forms | GB | AWS | DIN | JIS |
| 1 | CHW-40CNH | Gas Shielded Welding | TB/T H08MnSiCuCrNi Ⅱ | |||
| 2 | CHW-50C | Gas Shielded Welding | ER49-1 | |||
| 3 | CHW-50C3 | Gas Shielded Welding | ER50-3 | ER70S-3 | YGW16 | |
| 4 | CHW-50C6 | Gas Shielded Welding | ER50-6 | ER70S-6 | SG2 | YGW12 |
| 5 | CHW-50C8 | Gas Shielded Welding | ER70S-G | |||
| 6 | CHW-60C | Gas Shielded Welding | ER80S-G | |||
| 7 | CHW-62B3 | Gas Shielded Welding | ER62-B3 | ER80S-B3 | ||
| 8 | CHW-S1 | Submerged Arc Welding | H08A (E) | EL12 | S1 | |
| 9 | CHW-S2 | Submerged Arc Welding | H08MnA | EM12 | S2 | |
| 10 | CHW-S3 | Submerged Arc Welding | H10Mn2 | EH14 | S4 | W41 |
| 11 | CHW-S4 | Submerged Arc Welding | H10MnSi | EM13K | ||
| 12 | CHW-S5 | Submerged Arc Welding | H08Mn2SiA | |||
| 13 | CHW-S6 | Submerged Arc Welding | ER50-6 | |||
| 14 | CHW-S7 | Submerged Arc Welding | H008Mn2MoA | |||
| 15 | CHW-S8 | Submerged Arc Welding | H13Cr2.25MolA | EB3 | ||
| 16 | CHW-S9 | Submerged Arc Welding | HO8MnMoA | EA2 | ||
| 17 | CHW-SG | Submerged Arc Welding | ||||
| 18 | CHW-SQ1 | Submerged Arc Welding | ||||
| 19 | CHW-SQ2 | Submerged Arc Welding | ||||
| 20 | CHW-G1 | Gas Welding | H08A | EL12 | 8557-S1 |
Welding Fluxes for Carbon Steel and Low Alloy Steel:
| No | Grade | GB | AWS | |
| 1 | CHF101 | SJ101 | F5A2-H10Mn2 | E7A0-EH14 |
| 2 | CHF101GX | |||
| 3 | CHF102 | F5A4-H10Mn2 | E7A4-EH14 | |
| 4 | CHF103 | SJ103 | F4A4-H108MnA | E6A4-EM12 |
| 5 | CHF105 | SJ105 | F5P5-H10Mn2 | E7P6-EH14 |
| 6 | CHF105GX | |||
| 7 | CHF105HR | F5131-H10Mn2 | E7P2-EH14 | |
| 8 | CHF106Fe | F5A2-H10Mn2 | E7A0-EH14 | |
| 9 | CHF113 | F7141-H08Mn2MoA | F62P4-EA4-A4 | |
| 10 | CHF115 | F8121-H08Mn2MoA | F69P2-EA4-A4 | |
| 11 | CHF201 | SJ201 | F5A4-H10Mn2 | E6A0-EM12 |
| 12 | CHF250 | HJ250 | ||
| 13 | CHF301 | SJ301 | F4A2-H08A | E6A0-EL12 |
| 14 | CHF302 | SJ302 | F5A2-H08A | E7A0-EL12 |
| 15 | CHF303 | SJ303 | F5A2-H10MnSi | F7A0-EM13K |
| 16 | CHF330 | HJ330 | F4A0-H10Mn2 | F6AZ-EH14 |
| 17 | CHF350 | HJ350 | F4A2-H10Mn2 | F6A0-EH14 |
| 18 | CHF360 | HJ360 | ||
| 19 | CHF431 | HJ431 | F4A2-H08A | F6A0-EL12 |
| 20 | CHF501 | SJ501 | F4A0-H08A | F6AZ-EL12 |
| 21 | CHF523 | F4A0-H08A | F6AZ-EL12 | |
| 22 | CHFGP60 | F4A0-H08A | F6AZ-EL12 | |
| 23 | CHF603 | |||
| 24 | CHF603HR |
Welding Fluxes for Stainless Steel, Non-ferrous Metals, and Repair Welding:
| No | Grade | GB | |
| 1 | CHF131 | HJ131 | |
| 2 | CHF150 | HJ150 | |
| 3 | CHF202 | SJ202 | |
| 4 | CHF203 | SJ203 | |
| 5 | CHF260 | HJ260 | F308-H0Cr21Ni10 |
| 6 | CHF304D | ||
| 7 | CHF521 | ||
| 8 | CHF522 | SJ522 | |
| 9 | CHF570 | SJ570 | |
| 10 | CHF601 | SJ601 | F308-H0Cr21Ni10 |
As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.
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