ELECTRODE CLASSIFICATION
- The preffix "E" designates arc welding elsctrodes.
- The first two digits of 4 digit Nos. and first 3 digits of 5 digit Nos. indicate minium Tensile strength.
| E- |
60xx indicates minimum tensile strength 60,000 p.s.i. |
| E- |
70xx indicates minimum tensile strength 70,000 p.s.i. |
| E- |
80xx indicates minimum tensile strength 80,000 p.s.i. |
| E- |
90xx indicates minimum tensile strength 90,000 p.s.i. |
| E- |
100xx indicates minimum tensile strength 1,00,000 p.s.i. |
| E- |
110xx indicates minimum tensile strength 1,10,000 p.s.i. |
- Second last digit indicates the welding position.
- All positions
- Flat position and horizontal fillets.
- The last two digits together indicate the welding position giving coating type, current & polarity.
10. |
Suitable for all welding positions. Coating contains much cellulose. Fierce arc giving deep penetration. Thin, brittle slag. Can be used with DC(+) only. |
11. |
Similar type but specially for use on Ac. Can also be used with DC(+) but at the expense of good weldability. |
12. |
Suitable for all welding positions but in practice used mainly in flat and horixontal position. Coating contains large amount of titanium oxide. Can be used with AC and DC(-). |
13. |
Similar type giving satisfactory operation at lower OCV. Suitable for all welding positions. Can be used with AC and DC(-). |
14. |
Similar type with increased efficiency. Coating contains iron powder. Can be used with AC, DC(+) and DC(-) |
15. |
Suitable for all welding positions. Basic coating. Can be used with DC(+) only. |
16. |
Similar type but can be used with AC and DC(+). |
18. |
Similar type but can be used with AC and DC(+) |
20. |
Suitable for use in flat position and for standing fillets. Coating contains large amount of iron oxide. Acid type, Brittle, porous slag deraches easily. Can be used with AC, DC(+) and DC(-) |
24. |
Suitable for use in flat position and for standing fillets. Rutile type with higher efficiency (more iron powder) than type Exx 14. Can be used with AC and DC(+). |
27. |
Suitable for use in flat position and for standing fillets.Acid type
contact electrode.can be used with AC and DC(-) |
28. |
Suitable for use in flat position and for standing fillets.Efficiency
higher than for type EXX 18. Can be used with AC and DC (+) |
- The (EXXXX-'') indicates the approximate alloy in the weld deposits.
|
A1-0.5%Mo
B1 -0.5%Cr 0.5%Mo
B2 -1.25%Cr 0.5%Mo
B3 -2.25%Cr 1%Mo
B4 -2%Cr 0.5Mo
B5 -0.5%Cr 1%Mo
C1 -2.5%Ni
C2 -3.5%Ni
C3 -1%Ni 0.35Mo 0.15%Cr
D1, D2-0.25 - 0.45%Mo, 1.75%Mn
G -1%minMn, 0.5%minNi, 0.3%minCr, 0.2%minMo, 0.1%minV
|
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