A691 · 2¼Cr
For A691 · 2¼Cr, astm specification is A691; class or grade is 2¼Cr; esab preheat group is C; esab-recommended smaw (stick) filler is AA 9018-CM/8018-B3L; esab-recommended gmaw/gtaw filler is ER90S-B3, recorded from its source on 2026-09-16.
- ASTM specification
- A691 verified
- Class or grade
- 2¼Cr verified
- ESAB preheat group
- C verified
- ESAB-recommended SMAW (stick) filler
- AA 9018-CM/8018-B3L verified
- ESAB-recommended GMAW/GTAW filler
- ER90S-B3 verified
- ESAB-recommended SAW (submerged arc) filler
- 10.62/SA U515 verified
- ESAB-recommended FCAW (gas-shielded flux-cored) filler
- DS 9000-B3/9000-B2L verified
- ESAB-recommended MCAW (metal-cored) filler
- CW 90B3 verified
- Suggested preheat, low hydrogen (H8 and less), by thickness
- T < .75: 200, .75 < T < 1.5: 300, 1.5 < T < 2.5: 300, T > 2.5: 350 our reading
- Suggested preheat, hydrogen above H8, by thickness
- 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
A691 CM-65, CM-70, CMS-75 B AA 7018-Mo SA 83 CM-75 B AA 8018-NM SA 83 CMSH-70 A AA 7018/7018 Acclaim/8018 Group 1 CMSH-80 A AA 8018/8018-SR SA 75/83 ½CR, 1CR, 1¼Cr C AA 8018-CM/7018-B2L ER80S-B2 2¼Cr C AA 9018-CM/8018-B3L ER90S-B3
— 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, ESAB-recommended FCAW (gas-shielded flux-cored) filler and ESAB-recommended MCAW (metal-cored) filler
10.62/SA U515 DS 9000-B3/9000-B2L CW 90B3
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