A335 · P91
For A335, class or grade is P91; esab preheat group is D; esab-recommended smaw (stick) filler is AA 9018-B9; esab-recommended gmaw/gtaw filler is ER90S-B9; esab-recommended fcaw (gas-shielded flux-cored) filler is DS B9, recorded from its source on 2026-09-16.
- ASTM specification
- A335 verified
- Class or grade
- P91 verified
- ESAB preheat group
- D verified
- ESAB-recommended SMAW (stick) filler
- AA 9018-B9 verified
- ESAB-recommended GMAW/GTAW filler
- ER90S-B9 verified
- ESAB-recommended FCAW (gas-shielded flux-cored) filler
- DS B9 verified
- Suggested preheat by thickness, low hydrogen (H8 and less) — the A-D column for this grade's preheat group
- T < .75: 300, .75 < T < 1.5: 400, 1.5 < T < 2.5: 400, T > 2.5: 500 our reading
- Suggested preheat by thickness, hydrogen above H8 — the A-D column for this grade's preheat group
- T < .75: NR, .75 < T < 1.5: NR, 1.5 < T < 2.5: NR, T > 2.5: NR 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
A335 P1 B AA 7018-Mo SA 83 P2, P11, P12 C AA 8018-CM/7018-B2L ER80S-B2 P5, P5B, P5C, P21 C AA 8018-B6/8018-B6L ER80S-B6 P9 D AA 8018-B8 P22 C AA 9018-CM/8018-B3L ER90S-B3 P91 D AA 9018-B9 ER90S-B9
— 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 FCAW (gas-shielded flux-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.
DS B9
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