ASTM A790 / A790M
ASTM A790 is a standard material specification for seamless and
welded pipes in duplex and super duplex stainless steel alloys for
general corrosive service, with particular emphasis on resistance to
stress corrosion cracking (SCC). This specification covers chemical
composition, heat-treatment, mechanical properties including
tensile, yield, hardness and flattening test, surface finish, and
other optional requirements for austenitic-ferritic graded pipes.
Ferrobend stocks and supplies various grades of duplex and super
duplex seamless and welded pipes to ASTM A790 specification.
ASTM A790 Lean Duplex Stainless Steel Grades
| Grade / Trade Names |
UNS Designation |
DIN / EN / Werkstoff Number |
| ATI® 2003 / Alloy 2003 |
S32003 |
-- |
| LDX® 2101 / Alloy 2101 |
S32101 |
1.4162 |
| -- |
S81921 |
-- |
| ATI® 2102 |
S82011 |
-- |
| -- |
S82121 |
-- |
| LDX® 2404 |
S82441 |
1.4662 |
ASTM A790 Duplex Stainless Steel Grades
| Grade / Trade Names |
UNS Designation |
DIN / EN / Werkstoff Number |
| AISI 312 |
S31200 |
1.4460 |
| Uranus® 52 |
S31260 |
1.4481 |
| Alloy 3RE60™ |
S31500 |
1.4424 |
| SAF® 2205 / Alloy 2205 |
S31803 |
1.4462 |
| UR™ 2202 / Alloy 2202 |
S32202 |
1.4062 |
| SAF® 2205 / Uranus® 45N / Alloy 2205 |
S32205 |
1.4462 |
| SAF® 2304 / Alloy 2304 |
S32304 |
1.4362 |
| NAS 64 / SUS329J4L |
S32506 |
-- |
| -- |
S32808 |
-- |
| AISI 329 |
S32900 |
1.4460 |
| SAF® 2906 |
S32906 |
1.4477 |
| -- |
S32950 |
-- |
ASTM A790 Grades (Super Duplex Stainless Steel)
| Grade / Trade Names |
UNS Designation |
DIN / EN / Werkstoff Number |
| Uranus® 52N |
S32520 |
1.4507 |
| Ferralium® / Alloy 255 |
S32550 |
1.4507 |
| SAF® 2507 / Alloy 2507 |
S32750 |
1.4410 |
| Zeron 100 / Alloy 2507 |
S32760 |
1.4501 |
| 25CRW |
S39274 |
-- |
| -- |
S39277 |
-- |
ASTM A790 Hyper Duplex Stainless Steel Grades
| Grade / Trade Names |
UNS Designation |
DIN / EN / Werkstoff Number |
| Alloy 2707 |
S32707 |
1.4658 |
| SAF® 3207 |
S33207 |
1.4485 |