What steel is 40Cr seamless pipe? 40Cr seamless pipe is a kind of alloy structural steel. It has good comprehensive properties, low-temperature impact toughness and low notch sensitivity after quenching and tempering on the basis of high-quality carbon structural steel No. 40.

The mechanical properties of 40Cr seamless pipe are as follows:
Tensile strength: ≥ 980 Mpa; yield strength: ≥ 785 MPa; elongation after fracture: ≥ 9%; elongation after fracture: ≥ 45%; impact absorption energy: ≥ 47J.

The content of chemical components in 40Cr seamless pipe are as follows:
C: 0.37-0.44, Si: 0.17-0.37, Mn: 0.50-0.80，Cr: 0.80-1.10.

40Cr seamless pipe is one of the most widely used steel grades. After quenching and tempering, it is used to manufacture medium speed and medium load parts, such as machine tool gear, shaft worm, spline shaft, top sleeve, etc. After quenching and tempering and high frequency induction quenching, 40Cr seamless pipe is used to manufacture parts with high surface hardness and wear resistance, such as gear, shaft, spindle, crankshaft, mandrel, sleeve, pin, connecting rod, screw, nut, intake valve, etc.