Introduction
Stainless steel grade 254 SMO is austenitic stainless steel of the highest quality. It is created with twice the strength of the stainless steel 300 series and a combination of impact toughness, resistance to chloride stress corrosion, cracking, pitting, and crevice corrosion. Grade SMO 254 buttweld fittings is a cost-effective substitute for high nickel and titanium alloys in certain applications. It is also recognized to have exceptional workability. SMO 254 is a less expensive alternative. These pipes and tubes are available in a wide range of sizes, standards, thicknesses, and requirements. These have been designed for usage in seawater and other chloride medium applications. The grade offers outstanding anti-biofouling qualities that are particularly noticeable in seawater. These are extremely resistant to pitting and crevice cracking, as well as to ordinary corrosion. In terms of impact loads, these bears stress corrosion cracking. SMO grade has a lot of power. Because of their weldability, they may be welded with any sort of filler material and can even be regulated at low temperatures. SMO pipes and tubes are also Machinable and formable, allowing them to be easily formed into any complex shape or design.
SMO 254 Characteristics
These are the products that perform well in halide solutions with chloride and bromide ions present. The SMO 254 grade demonstrates the impact of local corrosion caused by pitting, crevices, and tension. SMO 254 is a low-carbon element material. Because of the low carbon content, there is a reduced chance of carbide precipitation during heat application during welding activity.
Machinability
Due to the exceptionally high work hardening rate and lack of sulfur content, stainless steel grade 254 SMO™ is quite difficult to mill; however, sharp tools, powerful machine machines, positive feeds, and a substantial amount of lubrication, and slow speeds tend to offer decent machining results.
Welding
Welding stainless steel grade 254 SMO necessitates the use of filler material, which results in inferior tensile qualities. AWS A5.14 ERNiCrMo-3 and alloy 625 are approved as filler metals. The electrodes used in the process must comply with AWS A5.11 ENiCrMo-12.
Annealing
The annealing temperature for this material should be 1149-1204°C (2100-2200°F), followed by a water quench.
Working in Extreme Conditions
Forging, upsetting, and other operations using this material can be carried out at temperatures ranging from 982 to 1149°C (1800 to 2100°F). Temperatures above this range are not recommended since they will cause scaling and reduce the material’s workability. It is recommended to undertake post-process annealing to regain maximal corrosion resistance.
Working in the Cold
Cold working can be done using any of the usual methods; however, the procedure will be difficult due to the high work hardening rate. As a result, the material will have greater strength and toughness.
Hardening
Heat treatment does not affect stainless steel grade 254 SMO. Only cold reduction allows for hardening.
Applications of SMO 254
Stainless steel grade 254 SMO™ is used in the following areas
- Saltwater handling
- Tall oil distillation columns
- Flue gas desulfurization scrubbers
- Components used in petroleum production
- Food processing equipment
- Process equipment in the chemical industry
- Bleaching equipment in the pulp and paper industry
- Flue-gas cleaning
- Desalination
- Heat exchangers