A178 · D
For A178, class or grade is D; esab preheat group is A; esab-recommended smaw (stick) filler is AA 7018/7018 Acclaim; esab-recommended gmaw/gtaw filler is Group 1; esab-recommended mcaw (metal-cored) filler is Group1, recorded from its source on 2026-09-16.
- ASTM specification
- A178 verified
- Class or grade
- D verified
- ESAB preheat group
- A verified
- ESAB-recommended SMAW (stick) filler
- AA 7018/7018 Acclaim verified
- ESAB-recommended GMAW/GTAW filler
- Group 1 verified
- ESAB-recommended MCAW (metal-cored) filler
- Group1 verified
- What that MIG group contains
- Spoolarc 29S, Spoolarc 82, Spoolarc 86, Spoolarc 87HP, Aristorod 12.50 verified
- What that metal-cored group contains
- Coreweld 70, Coreweld C-6, Coreweld C-6LF, Coreweld 77HS verified
- Suggested preheat by thickness, low hydrogen (H8 and less) — the A-D column for this grade's preheat group
- T < .75: 70, .75 < T < 1.5: 70, 1.5 < T < 2.5: 150, T > 2.5: 225 our reading
- Suggested preheat by thickness, hydrogen above H8 — the A-D column for this grade's preheat group
- 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
A178 A&C A Group 1, AA 7018/7018 Acclaim Group 1 D A AA 7018/7018 Acclaim Group 1
— 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 it comes from.
ESAB-recommended MCAW (metal-cored) filler
The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.
Group1
What that MIG group contains
MIG Group 1 Spoolarc 29S, Spoolarc 82, Spoolarc 86, Spoolarc 87HP, Aristorod 12.50
What that metal-cored group contains
Metal Cored Group 1 Coreweld 70, Coreweld C-6, Coreweld C-6LF, Coreweld 77HS
Suggested preheat by thickness, low hydrogen (H8 and less) — the A-D column for this grade's preheat group and Suggested preheat by thickness, hydrogen above H8 — the A-D column for this grade's preheat group
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