Mild Steel Flux Cored Alloys
Chemical Compositions
| A5.20 Class | C | Mn | Si | S | P | Cr(a) | Ni(a) | Mo(a) | V(a) | Al(a) | Cu(a) | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| E7xT-1C, -1M E7xT-5C, -5M E7xT-9C, -9M |
0.12 | 1.75 | 0.90 | 0.03 | 0.03 | 0.20 | 0.50 | 0.30 | 0.08 | - | 0.35 | Rem |
| E7xT-4 E7xT-6 E7xT-7 E7xT-8 E7xT-11 |
0.30 | 1.75 | 0.60 | 0.03 | 0.03 | 0.20 | 0.50 | 0.30 | 0.08 | 1.8 | 0.35 | Rem |
| E7xT-12C, -12M | 0.12 | 1.60 | 0.90 | 0.03 | 0.03 | 0.20 | 0.50 | 0.30 | 0.08 | - | 0.35 | Rem |
| ExxT-G | (b) | 1.75 | 0.90 | 0.03 | 0.03 | 0.20 | 0.50 | 0.30 | 0.08 | 1.8 | 0.35 | Rem |
| E6xT-13 E7xT-2C, -2M E7xT-3 E7xT-10 E7xT-13 E7xT-14 ExxT-GS |
Not specified(c) | Rem | ||||||||||
Per AWS A5.20, Table 6. Single values shown are maximum percentages.
(a) Analysis of these elements shall be reported only if intentionally added.
(b) For gas shielded electrodes: 0.18% maximum. For self-shielded electrodes: 0.30% maximum.
(c) Composition of weld metal is not particularly meaningful, since electrodes of these classifications are intended for single pass welds. Dilution from the base metal in such welds is usually quite high.
Properties
| AWS A5.20 Class | Minimum Tensile Strength | Minimum Yield Strength | Minimum Elongation in 2" (0.50" dia) |
|
|---|---|---|---|---|
| psi | MPa | psi | % | |
| E7xT-1C, -1M | 70,000 | 483 | 58,000 | 22 |
| E7xT-11 | 70,000 | 483 | 58,000 | 22 |
| E7xT-GS | 70,000 | 483 | not specified | not specified |
Per AWS A5.20, Table 1U.