ASTM A790 — Seamless and welded ferritic/austenitic stainless steel pipe
ASTM A790 covers seamless and straight-seam welded duplex (ferritic/austenitic) stainless steel pipe for general corrosive service, with particular emphasis on resistance to stress-corrosion cracking. It includes UNS S31803, S32205, S32750, S32760 and other duplex grades.
ASTM A790 at a glance
| Standard | ASTM A790 |
|---|---|
| Issued by | ASTM / ASME (SA-790) |
| Product form | Pipe |
| Typical use | Duplex and super duplex pipe |
| Grades on this site | 6 |
Equivalent and related standards
ASTM A790 grades — chemistry and mechanical properties
| Grade | UNS | C% | Cr% | Ni% | Mo% | YieldMPa min | TensileMPa min |
|---|---|---|---|---|---|---|---|
| ASTM A790 UNS S31803 | S31803 | 0.030 max | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | 450 | 620 |
| ASTM A790 UNS S32205 | S32205 | 0.030 max | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 485 | 655 |
| ASTM A182 F53 (Super Duplex 2507) | S32750 | 0.030 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 550 | 800 |
| ASTM A182 F55 (Super Duplex S32760) | S32760 | 0.030 max | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 550 | 750 |
| ASTM A790 UNS S32750 | S32750 | 0.030 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 550 | 800 |
| ASTM A790 UNS S32760 | S32760 | 0.030 max | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 550 | 750 |
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASTM A790: common questions
Which grades does ASTM A790 cover?
On this site: ASTM A790 UNS S31803, ASTM A790 UNS S32205, ASTM A182 F53 (Super Duplex 2507), ASTM A182 F55 (Super Duplex S32760), ASTM A790 UNS S32750, ASTM A790 UNS S32760. Open any grade for its full chemical composition, mechanical properties and PDF data sheet.
Does Teshi Group supply material to ASTM A790?
Teshi Group manufactures flanges, fittings, fasteners and valves, and supplies pipes and plates, to ASTM / ASME specifications and to equivalent EN, JIS, GB and IS standards on request, with EN 10204 3.1 certificates. Send your requirement to info@teshigroup.com.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.