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254SMO Forged
Standard: UNS S31254,DIN/EN 1.4547,ASTM A240,ASME SA-240
Dimensions(mm): Dia:10-1000mm
Place of Origin: Sichuan, China (Mainland)
Technique: Forged
Payment Terms: 30% advanced payment,the balance will be paid before shipment.
Minimum Order Quantity: 1.5 Ton/Tons
Port: Chongqing & Shanghai
Packaging Details: in bundle according to your requirement
Delivery Time: about 30-90 days
Supply Ability: 500000 Ton/Tons per Month

Detailed Product Description

254SMO Forged
Execution standard:UNS S31254,DIN/EN 1.4547,ASTM A240,ASME SA-240

Chemical composition:

  C: 0.05-0.10
Si: 1.40-2.00
        Cr: 20.00-22.00
        Ni: 10.00-12.00
        N: 0.14-0.20


254 smo is an austenitic stainless steel. Because of its high molybdenum content, so it has a very high resistance to pitting corrosion and crevice corrosion resistance. This brand of stainless steel is used for containing halide such as sea water environment and the research and development. Uniform corrosion resistance of 254 smo is also good. Especially in acid containing halide, the steel is better than ordinary stainless steel. Its C contains < 0.03%, the so called pure austenitic stainless steel
(< 0.01%, also called super austenitic stainless steel). Super stainless steel is a kind of special stainless steel, first in terms of chemical composition, unlike ordinary stainless steel, is refers to the high nickel, high chromium and high molybdenum of a high alloy stainless steel. The more famous is containing 6% Mo 254 smo, this kind of steel has good resistance to local corrosion performance, in sea water, air, there is gap, low speed under the condition of scour, has good resistance to pitting corrosion properties (PI of 40 or higher) and good resistance to stress corrosion performance, is the alternative material Ni base alloy and titanium alloy. Second in high temperature or corrosion resistance performance, more excellent resistance to high temperature or corrosion resistance, 304 stainless steel is irreplaceable. In addition, from the classification of stainless steel, special stainless steel's microstructure is a stable austenitic microstructure.
Because of this special stainless steel is a kind of high alloy material, so in the manufacturing process is quite complicated, general people can only rely on the traditional process to manufacture this kind of special stainless steel, such as perfusion, forging, rolling, and so on.
National standards: UNS S31254, DIN/EN, ASTM A240, ASME SA - 240-1.4547
Physical properties: the density: 8.24 g/cm3, melting point: 1320-1390 ℃, magnetic: no
Mechanical properties, tensile strength, sigma b p 650 mpa, yield strength sigma 310 mpa or greater b: elongation: delta 40% or higher, hardness: 182-182 (HB)
Corrosion resistance: it is a kind of super austenitic stainless steel, high corrosion resistance against acid halide and the environment and development, are widely used in high concentrations of chloride ions in the medium, seawater for harsh working environment. In acidic medium of all kinds of industrial occasions, especially in acid containing halide, 254 smo is far better than the other stainless steel, some cases are comparable to those obtained and hartz alloy, and titanium. Low carbon and high molybdenum content, make it has good resistance to pitting corrosion and crevice corrosion resistance, excellent resistance to intercrystalline corrosion, is a kind of cost-effective stainless steel, widely used in chemical industry at home and abroad, desulfurization environmental protection, etc.
Form a complete set of welding materials: ERNiCrMo - 3 wire, ENiCrMo - 3 electrode
Areas of application:
1. Ocean: Marine environment, Marine works, water desalination, mariculture, sea water heat exchange, etc.
2. Environmental protection: flue gas desulfurization of thermal power plant, waste water treatment, etc.
3. Energy: nuclear power generation, the comprehensive utilization of coal, tidal power generation, etc.
4. Oil field of chemical industry, oil refining, chemical equipment, etc.
5. The food sector: salt, soy sauce brewed, etc.
6. High concentrations of chloride ion environment: papermaking industry, various bleaching plant
High temperature resistant
1. A lot of field experiments and extensive experience shows that even in a slightly higher temperature, 254 smo in sea water also has the very high resistance crevice corrosion performance, only a few kinds of stainless steel with the performance.
2. 254 smo in acidic solution, such as paper bleaching for production and oxidation halide solution in the corrosion resistant ability is strongest and corrosion resistance of nickel base alloy and titanium alloy than beauty.
3. Since 254 the smo has high nitrogen content, so its mechanical strength is higher than other types of austenitic stainless steel. In addition, the 254 smo also has a high ductility and impact strength and good weldability.
4. High molybdenum content of 254 smo can make its oxidation in annealing has higher speed, which has a more than ordinary stainless steel after pickling rough surface. But the corrosion resistance of the steel without adverse effect.

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