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ANSI B16.9 ASTM A403 WPS31254 / 254SMO Duplex Stainless Steel Reducer
ASTM A403 WPS31254, also known as 254 SMO, is a super austenitic stainless steel with high resistance to pitting, crevice corrosion, and stress corrosion cracking. It contains high levels of molybdenum, nitrogen, and chromium, which contribute to its exceptional corrosion resistance properties.
ASTM A403 WPS31254 Duplex Stainless Steel Pipe Fittings Equivalent Grades
| STANDARD | UNS | WERKSTOFF NR. | EN |
| 254 SMO® | S31254 | 1.4547 | X1CrNiMoCuN20-18-7 |
ASTM A403 WPS31254 Duplex Stainless Steel Pipe Fittings Chemical Composition
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Ce | Fe | |
| SS 254 SMO | min. | - | 17.5 | - | 0.18 | - | - | - | 19.5 | 0.03 | Balance |
| max. | 0.02 | 18.5 | 0.08 | 0.22 | 0.01 | 1.00 | 0.03 | 20.5 | 0.08 | ||
ASTM A403 WPS31254 Duplex Stainless Steel Pipe Fittings Mechanical Properties
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 254 SMO | 650 | 35 | 300 | 50 | 70 |
ASTM A403 WPS31254 Super Stainless Steel Pipe Fittings
| Specification | ASTM A403, ASTM SB 366, ASTM B564, ASME SB564, En 2.4816 UNS S31254 |
| Dimensions Standards | ASME B16.9, ANSI B16.9, ASME B16.28, ANSI B16.28, ANSI B16.25, MSS-SP-43, MSS-SP-75 |
| Size Range | S31254 / 254 SMO Seamless Butt Weld Fittings: 1/2″ – 10″ S31254 / 254 SMO Welded Butt Weld Fittings: 1/2″ – 48″ |
| Wall Thickness | 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80, STD, 60, 80, XS, 100, 120, 140, 160 Sch XXS |
| Type | Seamless / Welded / ERW/ Fabricated / Forged |
| Form | Con. Reducer, Ecc. Reducer |
| Surface treatment | Sand Rolling, Sand Blasting, Acid Cleaning |
ASTM A403 WPS31254 Duplex Stainless Steel Pipe Fittings
| 254 SMO 90 Deg Long Radius Elbow | UNS S31254 F44 Eccentric Reducer |
| UNS S31254 F44 90 Deg Short Radius Elbow | Alloy 254 6mo Stub End |
| Alloy 254 6mo 45 Deg Long Radius Elbow | ASTM A403 WPS S31254 End Cap |
| ASTM A403 WPS S31254 Buttweld Elbow | 254 SMO Stainless Steel Pipe Cap |
| 254 SMO Stainless Steel Elbow | F44 UNS S31254 Reducer |
| F44 UNS S31254 Seamless Butt Weld Fittings | Stainless Steel S31254 1.4547 Long Radius Bend |
| Stainless Steel S31254 1.4547 45 Deg Short Radius Elbow | SMO 254 Duplex Pipe Elbow |
| SMO 254 Duplex U Bend | 1.4547 Stainless Steel 5D Bend |
| 1.4547 Stainless Steel 180 Deg Long Radius Elbow | ASTM A403 UNS S31254 Pipe Tee |
| ASTM A403 UNS S31254 180 Deg Short Radius Elbow | 254 SMO Pipe Cross |
| 254 SMO Equal Cross | UNS S31254 F44 Welded Pipe Fittings |
| UNS S31254 F44 Stubends | Alloy 254 6mo Seamless Pipe Fitting |
| Alloy 254 6mo Equal Tee | ASTM A403 WPS S31254 Pipe Reducer |
| ASTM A403 WPS S31254 Tees | 254 SMO Stainless Steel Pipe Nipple |
| 254 SMO Stainless Steel Reducing Tee | F44 UNS S31254 Pipe End Cap |
| F44 UNS S31254 Eccentric Reducer | Stainless Steel S31254 1.4547 End Pipe Cap |
| Stainless Steel S31254 1.4547 Concentric Reducer | SMO 254 Duplex Pipe Bends |
| SMO 254 Duplex Cross | 1.4547 Stainless Steel Lap Joint |
| 1.4547 Stainless Steel Straight Cross | ASTM A403 UNS S31254 Buttweld Fittings |
| ASTM A403 UNS S31254 Reducing Cross | 254 SMO Piggable Bend |
| 254 SMO Concentric Reducer | UNS S31254 F44 Lateral Tee |
Application
