254SMo, UNS S31254, 6 Moly Alloy
UNS S31254 (Equal and Superior Than 254 SMO,EN 1.4547) is an austenitic stainless steel of the ELC type developed for use in seawater and other aggressive chloride-bearing media. The steel is characterized by the following properties:
- excellent resistance to pitting and crevice corrosion
- high resistance to general corrosion
- high resistance to stress corrosion cracking
- higher strength t han conventional austenitic stainless steelsgood weldability
Alloy254SMO Chemical Composition:Ni:17.5~18.5 Cr:19.5~20.5 Mo:6~6.5 Cu:0.5~1.0 N:0.18~0.22 C:Max0.20 Mn:Max1.0 Si:Max0.8 P:Max0.03 S:Max0.01
The speification we produce: Seamless Tube: OD:15.88-219.1mm WT:0.8-20mm
Standard: ASTM A269, A213,A312,EN216-3.
Metallurgical structure Alloy 254SMO is face-centered cubic lattice structure. In order to obtain austenitic structure, 254SMO general annealing in the 1150-1200degree.In some cases, the material maybe with the traces of metal middle phase (x phase and & alpha phase). However,their impact strength and corrosion resistance are not adversely affected in normal circumstances. When placed in the range of 600-1000degree, they may phase in the grain boundary precipitation.