42CrMo QT replace ASTM A193 B7, round bar, fully threaded bar, stud bolt

ASTM A193 Grade B7/B7M is alloy steel, GB 42CrMo AISI 4040/4142 quenched and tempered.

 

Chemical composition: C: 0.37 ~0.49; Si: 0.15~0.35; Mn:0.65~1.10; S: ≤0.035; P: ≤0.035; Cr:0.75~1.20; Mo: 0.15~0.25

Thread sizes:  M16~M56

Thread screw: Cold thread

Surface Treatment: Oil, Grease, Dacromet, Zinc coating,Paint, tape, fabric, Water-proof Paper, Box.

Place of Origin: China

Equivalent grades conversion

Standard Grade
GB 42CrMo
AISI 4140
ГOCT 38XM
BS 708M40, 708A42, 709M40
NF 40CD4, 42CD4
DIN 41CrMo4, 42CrMo4, 1.7225
JIS SCM4
ISO 683, 1 3
SAE 4140H, 4140RH

Mechanical composition

Tensile strength: min 125 ksi

Yield strength : min 105 ksi

Elongation rate: min 16%

Reduction rate: min 50%

Impact energy: akv min 63J

Hardness: C35

 

Formula reference

Round bar weight KG =  length(m) x radius(mm)² x 0.00617

 

 

LT Group 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.

DSC_0112

 

 

Production Line

production line

 

Quality Control System

 

Quality Control

 

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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.

Certificates

 

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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.


Post time: Aug-03-2020