A543 · all types Cl 1
For A543 · all types Cl 1, astm specification is A543; class or grade is all types Cl 1; esab preheat group is B; esab-recommended smaw (stick) filler is AA T; esab-recommended gmaw/gtaw filler is SA 120, recorded from its source on 2026-09-16.
- ASTM specification
- A543 verified
- Class or grade
- all types Cl 1 verified
- ESAB preheat group
- B verified
- ESAB-recommended SMAW (stick) filler
- AA T verified
- ESAB-recommended GMAW/GTAW filler
- SA 120 verified
- ESAB-recommended SAW (submerged arc) filler
- 10.62/SA 120 verified
- ESAB-recommended FCAW (gas-shielded flux-cored) filler
- DS T-115/II 110 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
A543 all types Cl 1 B AA T SA 120
— 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 and ESAB-recommended FCAW (gas-shielded flux-cored) filler
10.62/SA 120 DS T-115/II 110
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