F44/254SMO is an austenitic stainless steel with 6% molybdenum steels.
F44’s Welding Material:
Ernicrmo-3 wire, ENICRMO-3 electrode
F44 Main Ingredients:
Carbon (C) 0.02 or less, manganese (Mn) of 1.00 or less, 17.5 ~ bai18.5 nickel (Ni), silicon (Si) of 0.8 or less phosphorus (P) of 0.03 or less, [SCALE STEEL]sulfur (S) of 0.01 or less, chromium (Cr) 19.5 ~ 20.5, copper (Cu) 0.5 ~ 1.0, molybdenum (Mo) 6.0 ~ 6.5
Because of its high molybdenum content, it has very high corrosion resistance to spot and crevices.This grade of stainless steel is developed for use in halogenated environments such as sea water.The 254SMO also has good resistance to uniform corrosion.Especially in the acid containing halide, the steel is superior to [SCALE STEEL]ordinary stainless steel.Its C contains <0.03%, so called pure austenitic stainless steel.(<0.01% also known as super austenitic stainless steel).Super stainless steel is a special stainless steel, first of all in the chemical composition of the different from ordinary stainless steel, is to contain high nickel, high chromium, high molybdenum of a high alloy stainless steel.The famous steel is 254SMo containing 6%Mo. This kind of steel has very good local corrosion resistance. It has good pitting resistance (PI≥40) and good stress corrosion resistance under the conditions of seawater, inflation, crevice and low speed erosion, and is a substitute material for Ni base alloy and titanium alloy.Secondly, in terms of high temperature or corrosion resistance, it has better high temperature or corrosion resistance, and 304 stainless steel cannot be replaced.In addition, from the classification of stainless steel, special stainless steel metallographic structure is a stable austenitic metallographic structure.
Because this special stainless steel is a kind of high alloy material, so in the manufacturing process is quite complex, generally people can only rely on the traditional process to make this special stainless steel, such as perfusion, [SCALE STEEL]forging, rolling and so on.
F44 Stainless’ Equivalent Grades/ Materials:
UNS S31254, DIN/EN 1.4547, 254SMO, F44, 00Cr20Ni18Mo6CuN
ASTM A240, ASME SA-240, B312/B269, A276
Physical Properties for F44 Stainless:
Density: 8.24g/cm3, melting point: 1320-1390 ℃, magnetism: none
F44 Mechanical Properties:
Tensile strength: B ≥650Mpa, yield strength: B ≥310Mpa: elongation: ≥40%, hardness: 182-223 (HB)
F44’s Corrosion Property:
It is a kind of high corrosion resistant super austenitic stainless steel. It is developed for halide and acid environment. It is widely used in high concentration chloride ion medium, sea water and other harsh working conditions.254SMO is far superior to other stainless steels and in some cases comparable to Hastelloy alloys and titanium[SCALE STEEL] in various industrial applications of acidic media, especially in halide acids.With low carbon content and high molybdenum content, it has good corrosion resistance to point and crack and excellent corrosion resistance to intercrystal. It is a kind of cost-effective stainless steel, which is widely used in chemical industry, desulfurization and environmental protection fields at home and abroad.
Application Scope for F44 Stainless:
Ocean: Marine Environment Marine Structures, Sea Water Desalination, Sea Water Aquaculture, Sea Water Heat Exchange, etc.