15CrMo round bar has good technological properties and welding performance,in the temperature of 500～550 has higher lasting strength . When the temperature over 550℃ ,it has worse oxgen resistance and creep strength .When in the temperature of 550℃ for a long time , the heat resistance and intension of steel also become low .It used to making high and middle pressure catheter of smoke, collecting box , superheater and forging when the tube wall's temperature is 550℃.
15CrMo round bar Specifications：
Diameter:6mm-300mm
Length:3000mm-6000mm
technology:cold drawn/hot rolled/forged
15CrMo round bar Chemical composition
C ：0.12～0.18
Si：0.17～0.37
Mn：0.40～0.70
S ：allow remains content≤0.035
P ：allow remains content≤0.035
Cr：0.80～1.10
Ni：allow remains content≤0.030
Cu：allow remains content≤0.030
Mo：0.40～0.55
15CrMo round bar mechanical properties：
tensile strengthσb (MPa)：≥440(45)
yield strength σs (MPa)：≥295(30)
extensibility δ5 (％)：≥22
reduction of area ψ (％)：≥60
ballistic work Akv (J)：≥94
notched bar impact strength αkv (J/cm2)：≥118(12)
rigidity ：≤179HB
specimen size：specimen size of rough30mm
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