9CR

General purpose pipe manufactured to ASTM Specification 519

Similar to 4140 (which has a lower carbon level), 9CR has improved hardenability and is more commonly used in the higher strength >= 110ksi condition.

Available in bar dimensions of 50.8 mm (2") to 762 mm (30")

Length range up to 9.14 m (30') 

Product Group: 
Mechanical Bar & Tube

  • Select Yield :
  • 80

Chemical Composition

C Mn Mo Cr Ni Cu Ti P S Si V Al
Min 0.090 0.300 0.900 8.000 - - - - - - - -
Max 0.150 0.600 1.100 10.000 0.250 0.250 - 0.020 0.010 1.000 - 0.040

Mechanical Properties

Tensile Strength 689 MPa min 100,000 psi min
Yield Strength 552 MPa min 655 MPa max
  80,000 psi min 95,000 psi max
Total Elongation Under Load 20.000 % -
Hardness 22 Max HRC -