A269 · 409, S40910, S40920, S40930
For A269, class or grade is 409, S40910, S40920, S40930; esab preheat group is C; esab-recommended smaw (stick) filler is AR 309/309H/308/308H, OK 61.25; esab-recommended gmaw/gtaw filler is Autrod/Tigrod 409Nb; suggested preheat by thickness, low hydrogen (h8 and less) — the a-d column for this grade's preheat group is T < .75: 200, .75 < T < 1.5: 300, 1.5 < T < 2.5: 300, T > 2.5: 350, recorded from its source on 2026-08-31.
- ASTM specification
- A269 verified
- Class or grade
- 409, S40910, S40920, S40930 verified
- ESAB preheat group
- C verified
- ESAB-recommended SMAW (stick) filler
- AR 309/309H/308/308H, OK 61.25 verified
- ESAB-recommended GMAW/GTAW filler
- Autrod/Tigrod 409Nb verified
- Suggested preheat by thickness, low hydrogen (H8 and less) — the A-D column for this grade's preheat group
- T < .75: 200, .75 < T < 1.5: 300, 1.5 < T < 2.5: 300, T > 2.5: 350 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
A269 304 AR 308/308H/308L, OK 61.25, Autrod/Tigrod 308H/308L/308LSi 304L, 304LN AR 308L Autrod/Tigrod 308L/308LSi 316 AR 316/316H/316L Autrod/Tigrod 316L/316LSi 316H AR 316/316H Autrod/Tigrod 316L/316LSi 316L, 316LN AR 316L Autrod/Tigrod 316L/316LSi 317 Autrod/Tigrod 317L 321, 347, 348 OK 61.81/61.85 Autrod/Tigrod 347/347Si 405, S41500 C OK 68.17 Autrod/Tigrod 410NiMo 409, S40910, S40920, S40930 C AR 309/309H/308/308H, OK 61.25 Autrod/Tigrod 409Nb
— assets.esab.com, retrieved 2026-08-31
Where each value comes from
The values above are stated away from the sentence quoted with the answer, so the passage that states them is shown here too.
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 2026-08-31
Source
- assets.esab.comhttps://assets.esab.com/assetbank-esab/assetfile/22174.pdf