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High Mo content W.Nr.1.4547 UNS S31254 254SMO heavy hex nut/jam nut ASME B18.2.2
1. GENERAL CHARACTERISTICS OF STAINLESS STEEL ALLOY 254 SMO
This alloy has a high nickel content and about 6 percent molybdenum, together with copper and nitrogen additions. The alloy was developed, along with a series of others, to resist stress corrosion cracking in boiling chloride solutions. It is relatively easy to fabricate and weld.
| Element | Content (%) |
| Iron, Fe | 55.69 |
| Chromium, Cr | 20 |
| Nickel, Ni | 18 |
| Molybdenum, Mo | 6.1 |
| Nitrogen, N | 0.20 |
| Carbon, C | 0.010 |
The physical properties of stainless steel grade 254 SMO™ are tabulated below.
| Properties | Metric | Imperial |
| Density | 8 g/cm3 | 0.289 lb/in3 |
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 |
| Material: | Duplex Stainless Steel, Super Duplex Stainless Steel. |
| Standard : | ASTM / ASME F60 / F51/ F61 / F55 / F53 |
| Grade: | UNS S31803, S32205, S32550, S32750, S32760 |
| Type of Fasteners: | Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws. Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium.
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| In Form of: | Hex, Square, Round , Threading as per Gauge Etc. |
3. Applications Stainless steel grade 254 SMO™ is used in the following areas:
5. 254SMO bolt nut washer stud screw photo:
