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254SMo Chemical Composition 254SMo Rolled Alloys Plate
254SMo is an austenitic stainless steel specifically developed for use in halide-containing environments such as seawater. This steel demonstrates superior performance particularly in halide-containing acids and offers excellent resistance to uniform corrosion. With carbon content below 0.02%, it is classified as pure austenitic stainless steel, and when carbon content is less than 0.01%, it qualifies as super austenitic stainless steel.
Features of Inox 254SMo
Super stainless steel represents a specialized category of stainless steel distinguished from ordinary grades by its high alloy content of nickel, chromium, and molybdenum. The most prominent example is 254SMo with 6% molybdenum content. The elevated molybdenum concentration provides exceptional local corrosion resistance, along with superior resistance to pitting corrosion (PI ≥ 40) and stress corrosion in demanding conditions including seawater, aeration, crevices, and low-speed scouring. This makes 254SMo an excellent alternative to nickel-based alloys and titanium alloys.
Additionally, 254SMo exhibits outstanding high-temperature resistance and corrosion performance that surpasses 304 stainless steel. From a metallurgical perspective, special stainless steel maintains a stable austenitic structure.
Extensive field testing and practical experience confirm that 254SMo maintains high crevice corrosion resistance in seawater, even at elevated temperatures—a characteristic shared by only a few stainless steel types. In acidic solutions and oxidizing halide environments such as those found in paper bleaching applications, 254SMo demonstrates corrosion resistance comparable to the most resistant nickel-based alloys and titanium alloys.
The high nitrogen content in 254SMo provides enhanced mechanical strength compared to other austenitic stainless steels. The alloy also offers high ductility, excellent impact strength, and good weldability. While the high molybdenum content results in increased oxidation during annealing, leading to a slightly rougher surface after pickling compared to conventional stainless steels, this does not compromise the material's corrosion resistance.
Specification
Standard
UNS
Werkstoff Nr.
EN
SS
AFNOR
254 SMO
S31254
1.4529
X1CrNiMoCuN20-18-7
2378*
Z1 CNDU 20.18.06AZ*
Chemical Properties
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
Mechanical Properties
The following table shows mechanical properties of stainless steel grade 254 SMO™.
Environmental Protection: Flue gas desulfurization for thermal power generation, wastewater treatment
Energy: Nuclear power generation, comprehensive coal utilization, ocean wave power generation
Petrochemical Industry: Refining operations, chemical processing equipment
Food: Salt production, soy sauce brewing processes
High Concentration Chloride Ion Environment: Paper industry applications, various bleaching systems
Other specialized industrial applications
Product Tags
Grade 254SMo, Type 254SMo, Inox 254SMo, AISI 254SMo, SUS 254SMo, 1.4547, UNS S31254, Acero 254SMo
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
