CF3MN Stainless Steel Properties, Composition & Equivalent

CF3MN ASTM A743 / A351     Grade(UNS): J92804     Alloy Family: Austenitic Stainless Steel     Equivalent: 304LN stainless steel

What is CF3MN Stainless Steel ?

CF3MN alloy is an ultra-low carbon austenitic alloy with low carbon content on the basis of stainless steel, which adds N to the CF3M steel and possesses the characteristics of CF3N. CF3MN has good corrosion resistance to various organic acids, inorganic acids, bases and salts.Good resistance to sensitized intergranular corrosion.Not suitable for multi-layer post-weld heat treatment.

CF3MN is mainly used in oil, chemical industry, medical treatment, food, light industry, mechanical instrument and other industrial conveying pipelines as well as mechanical structural parts.In addition, it is widely used in manufacturing mechanical parts and engineering structures because of its light weight when bending and torsional strength are the same.It is also commonly used in the production of various conventional weapons, barrels, shells, etc.

CF3MN ASTM A743 

CF3MN Chemical Composition

C Mn Si P S Cr Ni Mo Nitrogen
Max 0.03 1.50 1.50 0.04 0.04 22.0 13.0 3.0 0.20
Min 17.0 9.0 2.0 0.10

Heat treatment

(1) Heat to 1900°F [1040°C] minimum, hold for sufficient time to heat casting to temperature, and cool rapidly.
(2) As cast if corrosion resistance is acceptable

Mechanical Properties

GradeCF3MN
Reduction of Area, min / %
Yield Strength, minKsi – 37, MPa – 255
Tensile Strength, minKsi – 75, MPa – 515
Elongation[50mm], min / %35 %

Features

  • Very high conductivity
  • High internal energy
  • Low toughness
  • The hardening effect is obvious
  • Good wear resistance

Applications

  • Petroleum
  • Chemical industry
  • Medical care
  • Food processing
  • Light industry
  • Barrel
  • Marine equipment

CF3MN Equivalent

316LN stainless steel

316LN stainless steel is used in pulp and paper equipment, heat exchanger, dyeing equipment, film processing equipment, pipelines, materials for building exterior in coastal areas, as well as watch chains and case of high-grade watches.

It is a kind of molybdenum-bearing stainless steel. Due to the molybdenum content in the steel, the performance of this steel is better than that of 316 and 316L stainless steel. Under high-temperature conditions, when the concentration of sulfuric acid is lower than 15% or higher than 85%, CF3MN stainless steel has a wide range of applications. It also has good chlorine resistance, so it is usually used in a marine environment.
Because of its excellent corrosion resistance, 316LN is used in the chemical industry. It is also a derivative steel of 18-8 austenitic stainless steel with 2-3% Mo added. On the basis of this, many steel grades have been derived

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