Lowest price 4140/SCM440/42CrMo4 Cold Drawn Bar Precision from Chinese mill


Yeguang steel Metal is a distributor of 4140 grade cold drawn steel bar. 4140 bars have high hardenability, and the molybdenum content provides high strength and uniformity of hardness. Unlike other grades, the carbon content of 4140 grade steel allows it to hold up well to heat treatment, while having good wear resistance and strength.

4140 Mechanical Properties (Annealed)

Tensile Strength95,000 psi
Yield Strength60,500 psi
Elongation in 2″25.7%
Reduction of Area55.9%
Brinelle Hardness197

4140 Mechanical Properties (Normalized)

Tensile Strength148,000 psi
Yield Strength95,000 psi
Elongation in 2″17.7%
Reduction of Area46.8%
Brinelle Hardness302

Chemcial Compositions(%):
Quality StandardSteel GradeCSiMnPSCrNiMo
ASTM A2941400.38-0.430.15-0.350.75-1.00≤0.035≤0.0400.80-1.10/0.15-0.25
JIS G4053SCM4400.38-0.430.15-0.350.60-0.90≤0.030≤0.0300.90-1.20≤0.250.15-0.30
EN 10083-342CrMo40.38-0.45≤0.400.60-0.90≤0.025≤0.0350.90-1.200.15-0.30/
  • ASTM A29 Standard Specification Steel Bars Carbon and Alloy Hot Wrought General Requirements 
  • JIS G4053 2008 Low alloyed steels for machine structural use
  • Steel for quenching and tempering-Part3: Technical delivery conditions for alloy steels of EN 10083-3:2007

Steel Grades

  • ASTM A29: 4140
  • JIS G4053: SCM440
  • EN10083:  42CrMo4

Surface Condition:

  • Smooth Surface
  • Grinded Surface 
  • Peeled Surface