CF3M Stainless Steel Properties, Composition & Equivalent

CF3M ASTM A743/A744/A351     Grade(UNS): J92800     Alloy Family: Austenitic Stainless Steel     Equivalent: 316L stainless steel

What is CF3M Stainless Steel ?

CF3M alloy is a kind of austenitic steel alloy. By adding molybdenum, the corrosion resistance and high temperature strength of CF3M stainless steel are very high. High temperature resistance up to 1200-1300 degrees, can be used in harsh conditions.

The main uses of CF3M stainless steel are pulp and paper equipment, heat exchanger, dyeing equipment, membrane treatment equipment, pipelines, coastal building materials, etc. In 2013, it was also used in the field of solenoid valve, mainly used for shell, clamp, ball valve, valve body, valve seat, nut, valve stem, etc.

CF3M ASTM A743

CF3M chemical composition

 CMnSiPSCrNi
Max0.031.001.500.040.0321.013.0
Min17.09.0

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

GradeCF3M ASTM A743
Reduction of Area, min / %
Yield Strength, minKsi – 30, MPa – 205
Tensile Strength, minKsi – 70, MPa – 485
Elongation[50mm], min / %30 %

Features

  • High temperature resistance
  • High corrosion resistance
  • Good wear resistance
  • Good toughness

Applications

  • Power equipment
  • Wear resistance of mining and factory machinery is missing
  • Water pump
  • Ship hull
  • Turbine casing
  • Wear resistant pipe material

CF3M equivalent

316L Stainless steel

316L stainless steel has excellent corrosion resistance and is widely used in chemical industry. At the same time, it is also a derivative steel of 18-8 austenitic stainless steel with 2-3% Mo added. On the basis of 316L, many steel grades are also derived, such as 316Ti after adding a small amount of Ti, 316N by adding a small amount of N, and 317L by increasing the content of Ni and mo.

Most of 316L stainless steel on the market is produced according to ASTM A743 standard. Due to the high Mo content in 316L, the steel has excellent pitting resistance and can be safely used in the environment containing Cl – and other halogen ions.

The difference in composition leads to the use of 316 and 316L in different applications, with the 316L more suitable for manufacturing processes that require a lot of soldering because the lower carbon content minimizes harmful carbide deposits. The 316L is the medical implant of choice in more cases than the 316.

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Welding

CF3M stainless steel has good weldability. All standard welding methods can be used for welding. 316CB, 316L or 309CB stainless steel filler rods or electrodes can be used for welding according to the application. In order to obtain the best corrosion resistance, the welding section of 316 stainless steel needs post-weld annealing treatment. If 316L stainless steel is used, post-weld annealing is not required.

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