Stainless steel grade 254 SMO™ is a very high end austenitic stainless steel. It is designed with a combination of impact toughness resistance to chloride stress corrosion cracking, and pitting and crevice corrosion with strength that is twice that of the stainless steel 300 series.
For certain applications, grade 254 SMO™ has been reported to be a cost-effective substitute for high nickel and titanium alloys. It is known to possess excellent workability as well.
The following sections will discuss in detail about stainless steel grade 254 SMO™.
Chemical Composition
The chemical composition of stainless steel grade 254 SMO™ is outlined in the following table.
| Element | Content (%) |
| Iron, Fe | 55.69 |
| Chromium, Cr | 20 |
| Nickel, Ni | 18 |
| Molybdenum, Mo | 6.1 |
| Nitrogen, N | 0.20 |
| Carbon, C | 0.010 |
Physical Properties
The physical properties of stainless steel grade 254 SMO™ are tabulated below.
| Properties | Metric | Imperial |
| Density | 8 g/cm3 | 0.289 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of stainless steel grade 254 SMO™.
| Properties | Metric | Imperial |
| Tensile strength | 680 MPa | 98600 psi |
| Yield strength | 300 MPa | 43500 psi |
| Modulus of elasticity | 195 GPa | 28300 ksi |
| Shear modulus | 75 GPa | 10900 ksi |
| Poisson’s ratio | 0.30 | 0.30 |
| Elongation at break | 50 % | 50 % |
| Hardness, Brinell | 210 | 210 |
Thermal Properties
The thermal properties of stainless steel grade 254 SMO™ are tabulated below.
| Properties | Metric | Imperial |
| Thermal expansion co-efficient (@20-100°C/68-212°F) | 16.5 µm/m°C | 9.17 µin/in°F |
| Thermal conductivity | 14 W/mK | 97.2 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to stainless steel grade 254 SMO™ include the following.
| ASTM A813 | ASTM A469 | ASTM A269 | ASTM A240 | ASTM A182 (F44) |
ASTM A814
| ASTM A312
| ASTM A249
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We can provide 254SMO material in the form of flange, fittings, pipes.
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254SMO SO flange Images
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