Introduction
39 CrMoV13-9(X38CrMoV5-3) is a common corrosion resistant cast steel, belonging to the Cr-Mo-V series of stainless steel. It is an ideal material for various application and mainly used for producing valves, containers, bolts and parts that are used to work in chemical and petroleum industries with temperatures not higher than 600℃.
Chemical Composition
The typical chemical analysis of 39CrMoV13-9 is as below:
Carbon (C) 0.38-0.44 % Chromium (Cr) 0.90-1.10 % Molybdenum (Mo) 0.30-0.50 % Manganese (Mn) 0.40-0.60 % Vanadium (V) 0.08-0.13 % Iron (Fe) Remainder
Mechanical Properties
The mechanical properties of 39CrMoV13-9 are listed in the table:
Hardness HBW：295-345 Tensile strength Rm (MPa)：1200-1350 Yield strength Rp 0.2 (MPa)：≥1000 Elongation A(%)：≥20 Hardness HRC：45-54 Impact toughness(J)：50
Heat Treatment
Annealing: The steel should be annealed at 760℃ to 840℃ and then furnace cooled.
Normalizing: Normalizing should be done at 880℃ to 920℃ and the steel should be cooled in air.
Solution Annealing: This method should be used at 980℃ and then cooled in water or quenched oil.
Hardening: The hardening temperature should be 930℃ and then cooled in oil or water.
Welding
The steel can be welded by conventional methods.
Applications
The 39CrMoV13-9 steel is ideal for many applications like:
• Valves
• Fasteners
• Automobile parts
• Power plant components
• Pumps and fluid piping
• Heat exchangers
Conclusion
39CrMoV13-9 is an appropriate material choice for parts that require higher levels of corrosion-resistance and fatigue strength while operating in sub-temperatures. It is highly ductile in the annealed condition, making it suitable for cold-forming processes. It also has good thermal conductivity and toughness in temperatures up to 600℃. The weldability and machinability of this steel are also good. With various advantageous features, this steel can be used for various applications in diverse industries.
