A240 · 429
For A240, class or grade is 429; esab preheat group is C; esab-recommended smaw (stick) filler is AR 309L, OK 67.13; esab-recommended gmaw/gtaw filler is Autrod/Tigrod 309L/309Si/310; esab-recommended fcaw (gas-shielded flux-cored) filler is SB 309L, recorded from its source on 2026-09-16.
- ASTM specification
- A240 verified
- Class or grade
- 429 verified
- ESAB preheat group
- C verified
- ESAB-recommended SMAW (stick) filler
- AR 309L, OK 67.13 verified
- ESAB-recommended GMAW/GTAW filler
- Autrod/Tigrod 309L/309Si/310 verified
- ESAB-recommended FCAW (gas-shielded flux-cored) filler
- SB 309L verified
- ESAB-recommended FCAW (self-shielded flux-cored) filler
- CB 309L verified
- ESAB-recommended MCAW (metal-cored) filler
- AR MC309L 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
A240 201, 301, 302, 304 AR 308/308H, OK 61.25, AR 308L Autrod/Tigrod 308H/308L/308LSi 201L, 301L, 301LN, 304L, 304LN AR 308L Autrod/Tigrod 308L/308LSi 202, 304H, 304N AR 308/308H, OK 61.25 Autrod/Tigrod 308H 305 AR 308/308H, OK 61.25, AR 309/309H Autrod/Tigrod 308H 309H AR 309/309H 309S AR 309L Autrod/Tigrod 309L/309Si 310S, 310H OK 67.13 Autrod/Tigrod 310 316H AR 316/316H Autrod/Tigrod 316L/316LSi 316 AR 316/316H/316L Autrod/Tigrod 316L/316LSi 316L, 444 AR 316L Autrod/Tigrod 316L/316LSi 317 Autrod/Tigrod 317L 317L Autrod/Tigrod 317L 321, 321H, 347, 347H, 348, 348H OK 61.81/61.85 Autrod/Tigrod 347/347Si 405, S41500 OK 68.17 Autrod/Tigrod 410NiMo 409, S40910, S40920, S40930 AR 309/309H/308/308H, OK 61.25 Autrod/Tigrod 409Nb 429 C AR 309L, OK 67.13 Autrod/Tigrod 309L/309Si/310
— 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, ESAB-recommended FCAW (self-shielded flux-cored) filler and ESAB-recommended MCAW (metal-cored) filler
The source prints these values inside the passage below but does not name them there. The passage shows where each one appears; what ties them to this record is the position on the page, not anything the passage says.
SB 309L CB 309L AR MC309L
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