42CrMo4 EN 10083/3-2006 High Strength Alloy Steel Round Bar

Short Description:

Product Detail

Product Tags

 42CrMo4 alloy steel


StandardEN 10083/3-2006

Application: machine construction, base plates, axes, gear shafts, gear wheels

Surface condition: black, polished, rough machined, turned, painted, oil or grease covered

Chemical composition: C: 0.38 ~0.45; Si: ≤0.40; Mn:0.60~0.90; S: ≤0.035; P: ≤0.035; Cr:0.90~1.20; Mo: 0.15~0.30

Stock sizes:  φ30, φ35, φ40, φ45, φ50, φ60, φ65, φ70, φ90, φ100, φ110, φ130, φ120, φ140 mm

Equivalent grades conversion

Standard Grade
GB 42CrMo
AISI 4140, 4142
BS 708M40, 708A42, 709M40
NF 40CD4, 42CD4
DIN 41CrMo4, 42CrMo4, 1.7225
ISO 683, 1 3
SAE 4140H, 4140RH

Mechanical composition

Tensile strength: min 1080 MPa

Yield strength : min 930 MPa

Elongation rate: min 12%

Reduction rate: min 45%

Impact energy: akv min 63J

Hardness: 32HRC ~52 HRC

Melting point: 1416 ℃

Formula reference

Round bar weight KG = 3.14 x length x radius² x 0.00000785

Round pipe weight KG= 3.14 x length x (OD²-ID²) x 0.00000785

Plate weight KG= length x width x thickness x 0.00000785

(All lengths are mm)


We provide heat-treatment, cold thread, lab services according to customer’s technical requirements. Please send properties requriements to [email protected]. We will give positive response within one working day.




Production Line

production line


Quality Control System


Quality Control


Achieving the ISO 9001:2008 Certification is just one example of our Products’ dedication to quality and continuous improvement. Each employee is responsible for understanding company expectations and adhering to the procedures of our Quality Management System.
Our Products ensures customers receive the material ordered with accurate supporting paperwork. Customers can count on proper documentation, on-time performance and effective follow-up.




We will continually improves and expands the quantity and quality of our product which exactly meet customers need. We do whatever it takes to make our clients happy.
We will develop long-term commercial and technical partnerships with customers. And we are committed to continual quality improvement of all internal processes. The success of our quality program is affirmed by our strong customer retention rate.

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