254 SMO.
254 SMO is a molybdenum-bearing super-austenitic stainless steel used in specified chemical, seawater-related and process applications.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Quick details
| Material grade | 254 SMO (UNS S31254) |
|---|---|
| Forms | Pipes, Sheets & plates, Round bars, Butt-weld fittings, Flanges |
| Usage / application | Seawater cooling systems, Desalination plants, Offshore firewater lines |
| Test certificate | Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request. |
| Business type | Stockist and supplier |
| Location | 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India |
Also searched as: 254 SMO, 6Mo, UNS S31254, W.Nr 1.4547, X1CrNiMoCuN20-18-7
Product information for purchasing teams
254 SMO is a molybdenum-bearing super-austenitic stainless steel used in specified chemical, seawater-related and process applications. Confirm corrosion suitability against the actual medium, temperature and operating conditions.
Exact specification, availability and commercial details are confirmed against your enquiry.
Product forms and standards
| Form | Standard |
|---|---|
| Pipes | ASTM A312 / ASME SA312 UNS S31254 |
| Sheets & plates | ASTM A240 / ASME SA240 UNS S31254 |
| Round bars | ASTM A276 / A479 UNS S31254 |
| Butt-weld fittings | ASTM A403 WPS31254 |
| Flanges | ASTM A182 F44 |
Related designation references
| Grade | UNS | Werkstoff Nr. | EN / BS | JIS |
|---|---|---|---|---|
| 254 SMO | S31254 | 1.4547 | X1CrNiMoCuN20-18-7 | – |
Cross-standard references are not automatic substitutes. Confirm the exact product form, specification, composition, class and condition before accepting a substitution.
Chemical composition, %
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | Cu | N |
|---|---|---|---|---|---|---|---|---|---|---|
| 254 SMO | ≤ 0.020 | ≤ 1.00 | ≤ 0.80 | ≤ 0.030 | ≤ 0.010 | 19.5 – 20.5 | 17.5 – 18.5 | 6.0 – 6.5 | 0.50 – 1.00 | 0.18 – 0.25 |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | ≥ 650 MPa |
| Yield strength (0.2%) | ≥ 300 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 223 HB |
Values per ASTM A240 UNS S31254, annealed. Confirm against the current edition of the standard and your purchase specification.
Density: 8.00 g/cm³
Applications
- Seawater cooling systems
- Desalination plants
- Offshore firewater lines
- Pulp bleach plants
Questions buyers ask
What are the equivalent grades of 254 SMO?
254 SMO is UNS S31254, Werkstoff 1.4547, EN X1CrNiMoCuN20-18-7. Cross-standard references are not automatic substitutes; verify the product form, standard, composition and condition.
In which forms is 254 SMO available?
Pipes to ASTM A312 / ASME SA312 UNS S31254; Sheets & plates to ASTM A240 / ASME SA240 UNS S31254; Round bars to ASTM A276 / A479 UNS S31254; Butt-weld fittings to ASTM A403 WPS31254; Flanges to ASTM A182 F44.
What is the density of 254 SMO?
About 8.00 g/cm³ (8,000 kg/m³).
Where is Steel Impex India located?
Steel Impex India is at 231/235, Sant Sena Maharaja Marg, Mumbai, Maharashtra 400004, India We supply across India.