254SMo Super Austenitic Stainless Steel plate, 254 Smo stainless steel strip in stock
Due to its high levels of molybdenum and nickel, Alloy 254 SMO is frequently used in high chloride environments. Examples of applications that call for the used of Alloy 254 SMO include:
▪ Petroleum production
▪ Saltwater handling
▪ Food and chemical processing equipment
▪ Pulp mill bleach systems
▪ Flue gas desulphurization scrubbers
▪ Tall oil distillation columns
▪ Offshore oil & gas production equipment
▪ Desalination equipment
▪ ASTM/ASME: UNS S31254
▪ EURONORM: FeMi35Cr20Cu4Mo2
▪ DIN: 2.4660
| % | C | Cr | Mn | Mo | N | Ni | P | Si | S |
| 254 SMO | 0.02 max | 19.5-
20.0 |
1.00 max | 6.0-
6.5 |
0.18-
0.20 |
17.5-
18.0 |
0.03 max | 0.80 max | 1.01 max |
| Tensile strength Rm | 650 - 850 MPa |
| Yield point Rp0.2 | ≥ 300 MPa |
| Hardness | ≤ 260 HB |
| Elongation | ≥ 35% |
| Modulus of elasticity, E | 195 GPa |
| Thermal conductivity λ | 14 W ⋅ m⁻¹ K⁻¹ |
| Heat capacity cp20℃ | 500 J ⋅ kg⁻¹ K⁻¹ |
| Densityρ | 8.10 kg/dm³ |
| Annealing | 1050 - 1150℃ |
The high content of alloying elements gives Ultra 254 SMO exceptionally good resistance to uniform corrosion. It can withstand a wide range of acids due to the high alloying content of chromium and molybdenum. Resistance to pitting and crevice corrosion is determined mainly by the chromium, molybdenum, and nitrogen content. 254 SMO has high amounts of these elements and is suitable for demanding environments like chlorinated sea water. Resistance to stress corrosion cracking increases with increased content of nickel and molybdenum in particular. This means that Ultra 254 SMO has very good resistance to stress corrosion cracking.
Welding of stainless steel grade 254 SMO requires filler material without which it results in poor strength properties. Filler metals such as AWS A5.14 ERNiCrMo-3, and alloy 625 are recommended. Electrodes used in the process, have to match with AWS A5.11 ENiCrMo-12.
Forging, upsetting and other operations relating to this material can be performed at 982 - 1149°C (1800 - 2100°F). It is recommended that temperatures do not exceed this range as it would result in scaling and reduction in the workability of the material. To re-attain maximum corrosion resistant properties, it is advisable to perform post-process annealing.
Stainless steel grade 254 SMO does not respond to heat treatment. Hardening is possible only through cold reduction.
| 254 SMO stainless steel strip sizes and specifications | |
| Grade | 254 SMO |
| Cold rolled stainless steel strip | Thickness: 0.3mm- 3.0mm, Width: 5mm - 900mm,Surface: 2B/BA/SB/8K/HL/1D/2D etc |
| Hot rolled stainless steel strip | Thickness: 3.0mm - 16mm, Width: 10mm - 900mmSurface: No.1/pickling |
| Stainless steel foil | Thickness: 0.02mm- 0.2mm, Width: Less than 600mm, Surface: 2B |
| Standard | ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303, BS 1449, DN17441, G4305 |
| 254 SMO stainless steel coil sizes and specifications | |
| Grade | 254 SMO |
| Cold rolled stainless steel coil | Thickness: 0.3mm- 3.0mm, Width: 1000mm - 2000mm, Surface: 2B/BA/SB/8K/HL/1D/2D etc |
| Hot rolled stainless steel coil | Thickness: 3.0mm - 16mm, Width: 1000mm - 2000mm Surface: No.1/pickling |
| Standard | ASTM A240/A480, ASTM B688, ASTM B463/SB463, ASTM B168/SB168, ASTM B443/SB443/B424/SB424B625/SB625 B575/SB575, JIS G4303, BS 1449, DN17441, G4305 |
| 254 SMO stainless steel pipe sizes and specifications | |
| Grade | 254 SMO |
| Stainless steel seamless pipe | Outside diameter: 4.0 - 1219mm, Thickness: 0.5 -100mm, Length: 24000mm |
| Stainless steel welded pipe | Outside diameter: 6.0 - 2800mm, Thickness: 0.3 -45mm, Length: 18000mm |
| Stainless steel capillary pipe | Outside diameter: 0.4 - 16.0mm, Thickness: 0.1 -2.0mm, Length: 18000mm |
| Stainless steel welded sanitary pipe | Outside diameter:8.0- 850mm, Thickness: 1.0 -6.0mm |
| Stainless steel seamless sanitary pipe | Outside diameter: 6.0- 219mm, Thickness: 1.0 -6.0mm |
| Stainless steel square pipe | Side Length: 4*4 - 300*300mm, Thickness: 0.25 - 8.0mm, Length: 18000mm |
| Stainless steel rectangular pipe | Side Length: 4*6 - 200*400mm, Thickness: 0.25 - 8.0mm, Length: 18000mm |
| Stainless steel coil pipe | Outside diameter: 0.4 - 16mm, Thickness: 0.1 - 2.11mm |
| Standard | American Standard: ASTM A312, ASME SA269, ASTM A269, ASME SA213, ASTM A213 ASTM A511 ASTM A789, ASTM A790, ASTM A376, ASME SA335, B161, SB163, SB338, SB667/668 Germany Standard: DIN2462.1-1981, DIN17456-85, DIN17458-85· European Standard: EN10216-5, EN10216-2 Japanese Standard: JIS G3463-2006, JISG3459-2012 Russian Standard: GOST 9941-81 |
| 254 SMO stainless steel profile sizes and specifications | |
| Grade | 254 SMO |
| Specification | EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO |
| Standard | ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 . |
| Stainless steel round Bar | Diameter: 2mm - 600mm |
| Stainless steel bright Bar | Diameter: 2mm - 600mm |
| Stainless steel hex Bar | Dimension: 6mm - 80mm |
| Stainless steel square bar | Dimension: 3.0 - 180mm |
| Stainless steel flat bar | Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm |
| Stainless steel angle bar | as requirements |
| Length | Normally 6m, or produce as requirements |
| Surface | Black, Bright. Peeled and Polished, Solution annealed. |
| Delivery condition | cold drawn, hot rolled, forged, grinding, centerless grinding |
| Tolerance | H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients’ requirements |
