AISI 4140 42CrMo4 Alloy Steel Round Bar

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Loading Port:
China main port
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TT OR LC
Min Order Qty:
5 m.t.
Supply Capability:
100000 m.t./month

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Item specifice:

Standard: AISI,JIS,GB,BS,DIN,API,EN,ASTM Technique: Hot Rolled,Cold Rolled,Cold Drawn,ERW,Forged,Saw,Extruded,EFW,Spring Shape: U Channel,Square,C Channel,Hexagonal,Round,Rectangular,Oval,LTZ
Surface Treatment: Galvanized,Coated,Copper Coated,Color Coated,Oiled,Dry,Chromed Passivation,Polished,Bright,Black,PVDF Coated Steel Grade: Q195,Q215,Q235,Q215B,Q235B,RHB335,HRB400,200 Series,300 Series,400 Series,600 Series,SS400-SS490,10#,20#,A53(A,B) Certification: ISO,SGS,CE
Thickness: as required Length: as required Net Weight: as required

Product Description:

AISI 4140 42CrMo4 Alloy Steel Round Bar       

Specifications

1. Delivery condition: Hot-rolled,black surface


2. 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 Ni:≤0.030      Cu:≤0.030  Mo:0.15~0.30

C

Si

Mn

P

S

Cr

Mo

0.38-0.45

≤0.4

0.6-0.9

≤0.035

≤0.030

0.9-1.2

0.15-0.30

 

3.Process:  EAF + LF + VD + Forged + Heat Treatment (optional)

 

4.Delivery condition: Hot forged +Rough machined (black surface after Q/T)+ Turned (optional)

 

5.Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing

 

6.Test: ultrasonic test according to SEP 1921-84 3 D/D

 

7. Material details will be as per agreed technical specifications


Equipment

We are well-equipped with 2000-Ton Hydraulic press, 15-Ton Hydraulic manipulator, various kinds of Lathe and boring machine, product range OD 200mm-800mm, Length less than 9m.

AISI 4140 42CrMo4 Alloy Steel Round Bar


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AISI 4140 42CrMo4 Alloy Steel Round Bar

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Q:Why is the round bar bent?
In fact, the stress and deformation complex around reinforced concrete, bond stress varies with grip length of the rebar so bond strength with steel type, shape and position of the embedded in concrete, different direction and change, is also related to concrete strength, concrete compressive strength the higher the strength, the bond strength is generally determined by R=P/3.14dL. P for pullout force, D, rebar diameter, L, steel embedment length.
Q:How to distinguish a round bar from forging? Cold drawing? Hot rolling?
The main differences are in mechanical properties. Forged round steel is used in the processing of some special performance requirements. Round steel three processing methods are more common, should be very wide surface.
Q:What is galvanized round bar?
A cylindrical bar of iron or steel bar that crosses a layer of zinc on its surface.
Q:Cold drawn steel wire is a round bar or thread steel in Construction Engineering?
Cold drawn steel wire belongs to round bar in building engineering, and it is thread steel after coining. But the material of steel is not good. Who knows what material he made?.
Q:What's the difference between Q345 round steel and No. 45 round steel material?
Q345 is plain carbon steel, and Steel No. 45 is of high quality carbon steel. The biggest difference between them is that the content of sulfur and phosphorus is different.
Q:What are the differences between the products made of wrought round steel and hot rolled round steel and tested by mechanical testing after heat treatment?
Hot rolled round steel products made in forging round steel, this is because of forged steel ingot is as equivalent to the blooming state of the existing semi finished steel. Its structure, properties and impurity content are far below the quality level of hot rolled round steel.
Q:Is there a steel bar of 6 diameter on the market?
There is no rebar of 6 diameter on the market.
Q:Difference between cold drawn round steel and round steel
The free torsion rigidity of hot rolled steel is higher than that of cold rolled steel, so the torsion resistance of hot rolled steel is better than that of cold rolled steel.
Q:What kind of steel pipe is round steel?
A round bar is not a steel tube. In brief, its section is round, but it is solid, and the cross section of the pipe is hollow.
Q:What is the reason that the diameter 130-45 round steel will break after welding?
Steel No. 45 belongs to medium carbon steel. Because of its high carbon content, it has poor weldability, but its comprehensive property is good. If welding is needed, it needs to be preheated before welding and heat treated after welding to reduce its internal stress. The more commonly used weldability is No. 20 steel. In order to improve the performance of No. 20 steel, heat treatment is usually applied to its surface.

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