A266 · 1,2,4
For A266 · 1,2,4, astm specification is A266; class or grade is 1,2,4; esab preheat group is B; esab-recommended smaw (stick) filler is AA 7018/7018 Acclaim; esab-recommended gmaw/gtaw filler is SA 86/ 87HP, AROD 12.50, recorded from its source on 2026-09-16.
- ASTM specification
- A266 verified
- Class or grade
- 1,2,4 verified
- ESAB preheat group
- B verified
- ESAB-recommended SMAW (stick) filler
- AA 7018/7018 Acclaim verified
- ESAB-recommended GMAW/GTAW filler
- SA 86/ 87HP, AROD 12.50 verified
- ESAB-recommended SAW (submerged arc) filler
- 10.71/SA 71 verified
- ESAB-recommended FCAW (gas-shielded flux-cored) filler
- DS II70T-12H4/T-75/II 70-Ni1 H4 verified
- ESAB-recommended MCAW (metal-cored) filler
- Group 1 verified
- What that metal-cored group contains
- Coreweld 70, Coreweld C-6, Coreweld C-6LF, Coreweld 77HS verified
- Suggested preheat, low hydrogen (H8 and less), by thickness
- T < .75: 70, .75 < T < 1.5: 125, 1.5 < T < 2.5: 200, T > 2.5: 300 our reading
- Suggested preheat, hydrogen above H8, by thickness
- T < .75: 175, .75 < T < 1.5: 225, 1.5 < T < 2.5: 275, T > 2.5: 300 our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
A266 1,2,4 B AA 7018/7018 Acclaim SA 86/ 87HP, AROD 12.50
— assets.esab.com, retrieved 2026-09-16
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
ESAB-recommended SAW (submerged arc) filler, ESAB-recommended FCAW (gas-shielded flux-cored) filler and ESAB-recommended MCAW (metal-cored) filler
10.71/SA 71 DS II70T-12H4/T-75/II 70-Ni1 H4 Group 1
What that metal-cored group contains
Metal Cored Group 1 Coreweld 70, Coreweld C-6, Coreweld C-6LF, Coreweld 77HS
Suggested preheat, low hydrogen (H8 and less), by thickness and Suggested preheat, hydrogen above H8, by thickness
Preheat A B C D Low Hydrogen H8 and less T < .75 70 70 200 300 .75 < T < 1.5 70 125 300 400 1.5 < T < 2.5 150 200 300 400 T > 2.5 225 300 350 500 Hydrogen > H8 T < .75 175 175 NR NR .75 < T < 1.5 225 225 NR NR 1.5 < T < 2.5 275 275 NR NR T > 2.5 300 300 NR NR
— all from assets.esab.com, retrieved 2026-09-16
Source
- assets.esab.comhttps://assets.esab.com/assetbank-esab/assetfile/22174.pdf