254 SMO (UNS S31254)
254 SMO (UNS S31254, W.Nr. 1.4547) is a 6% molybdenum super-austenitic stainless, nitrogen-strengthened and alloyed with copper. It resists chloride pitting and crevice corrosion well beyond the 316 family, and is specified for seawater cooling, desalination, pulp bleaching, flue-gas desulphurisation and offshore process piping.
Available Forms
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | SMO 254 (UNS S31254) |
| Standards | ASTM A240, ASME SA240, EN 1.4547 |
| Forms Available | Sheet, plate, round bar, foil, coil, strip |
| Certification | Mill test certificates (EN 10204 3.1), RoHS and REACH compliant, full traceability |
| Price | INR 1,500 – 2,500 per kg. Indicative USD 18 – 29 per kg; quoted against grade, form, size and quantity. |
Specifications by Product Form
254 SMO (S31254) is supplied to a different standard in each form. Quote the one that matches the product you are ordering.
| Product form | Specification |
|---|---|
| Plate, sheet and strip | ASTM A240 |
| Rod and bar | ASTM A479 |
| Wire | ASTM A479 |
| Pipe and tube | ASTM A312 |
| Fittings | ASTM A403 |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | S31254 |
| Werkstoff / EN number | 1.4547 |
| EN designation | X1CrNiMoCuN20-18-7 |
| Density | 8.00 g/cm3 |
| Modulus of elasticity | 195 GPa |
| Coefficient of expansion | 16.5 µm/m·°C |
| Thermal conductivity | 14 W/m·°C |
| Specific heat | 500 J/kg·°C |
| Electrical resistivity | 0.85 µΩ·m |
| Magnetic | no |
Identifiers and physical constants for 254 SMO. A dash means no such designation is published for this grade.
Chemical composition, mechanical properties and size ranges differ by product form — see the individual form pages above for the figures that apply to what you are ordering.
Aurico Alloys LLP stocks 254 SMO across the forms above, with material test certificates (EN 10204 3.1) and export-ready packaging from Mumbai, India. Contact us for stock availability and pricing.