AISI 4340 Forged Round Steel Bars

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30 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

AISI 4340 Forged Round Steel Bars                 

                       

Products Details 

aisi 4340 forged steel round bars
Comparative standardGradeCSiMnCrMoVWPSNi
GB40CrNiMoA0.36-0.440.10-0.3500.45-0.701.10-1.400.20-0.35

0.030.021.30-1.7
AISI4337/4340









JISSNCM8









DIN34CrNiMo6/1.65820.34max 0.400.651.500.23

0.030.031.50
Dimensions
Round bar
Dia:10mm~700mmLength:2m~6m
Flat bar
Thickness:10mm~500mmLength:2m~12m
*Dimensions can be customized
Heat Treatment
Normalizing850-880°C-
Stress Relieving650°Cair cooling
Quenching830-860°Coil quenching
Tempering540-660°C
1.Normalizing
Normalizing temperature : 850-880°C

2.Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx.650°C,
holding for 1-2 hours at heat,followed by air cooling .
This operation is performed to reduce distortion during heat treatment .

3.Hardening
Harden from a temperature of 830-860°C followed by oil quenching.
Quenching temperature in the end quench test is 850°C.

4.Tempering
tempering temperature: 540-660°C

Detail information
ProcessEAF+LF+VD+Forging+(Rolling)+Annealing Condition (optional)
Delivery ConditionHot forged+Rough machined/turned surface
MOQ1 ton
Technical DataAccording to customer’s requirements of chemical composition, physical properties and mechanical testing
Ultrasonic TestUltrasonic test according to SEP 1921-84   G3 D/d E/d
Applications
Hot extrusion dies, forging die forging hammer, forging press die, precision forging die well as aluminum, copper and alloys die-casting mold.
Relevant documents
Contract DocumentsContract, Debit Note, PI(Performa Invoice)
Shipping DocumentsB/L(Bill of Loading), Packing List, Shipping list, CI(Commercial Invoice)
CertificationsSGS, ISO9001-2008, UT(Ultrasonic Test), CO(Certificate of Original), MTC(Milling Test Certificate)

 

Products Show 

 


Product Overviews 

Product NameTypical GradesDiameter(mm)Standard adopted
Carbon Steel20 (1020/S20C/C22)Ø16-Ø300

 

 

GB/SAE/JIS/DIN

 

40 (1040/S40C/C40)
45 (1045/S45C/C45)
Bearing SteelGCr9 (51100/SUJ1)Ø12-Ø250
GCr15 (52100/SUJ2/100Gr6)
GCr9SiMn (A485-Gr.1/SUJ3)

 

Cr-Mo Steel

20Cr (5120/SCr420H/20Cr4)Ø12-Ø250
40Cr (5140/SCr440/41Cr4)
42CrMo(4140/SCM440/42CrMo4)
Gear Steel20CrNiMoØ16-Ø600
20CrMn(5115/SMnC420/20MnCr5)
20CrNiMo(8620/SNCM220/20CrMiMo2)


Application 

Carbon Steel

 Mold bottom,   Plastic mold,   Construction machinery parts

 Automobile parts,   Security grills,   Screens,  Construction

 Bearing Steel  Aerospace,   Navigation,   Nuclear energy,   Chemical industry

 Electronic information,   Petrochemical,   Instrument and meter

 Transportation 

 Cr-Mo Steel  Mechanism & Fasteners gear,    Stressed components for vehicles 

 Engines and machines,    Parts of larger cross-section

 

Gear Steel

All kinds of gears,   Statically and dynamically stressed component for vehicles

Engines and machine,   Larger cross-section parts,   Crankshafts 


Work Shop 

 AISI 4340 Forged Round Steel Bars


Company Information 

CNBM International Corporation is the most important trading platform of CNBM group.

Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.

 


FAQ

1, Your advantages?

     professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale

2, Test & Certificate?

      SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem

3,  Factory or Trading Company?

      CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.

4, Payment Terms?

    30% TT as deposit and 70% before delivery.

    Irrevocable L/C at sight.

5, Trading Terms?

    EXW, FOB, CIF, FFR, CNF

6, After-sale Service?

     CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.

     For any problem, please kindly contact us at any your convenient time.

We'll reply you in our first priority within 24 hours.


Packaging & Delivery

1, Packaging: seaworthy package or as required 

2, Delivery: 35-45 days or based on quantity


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Q:Can I use steel bar instead of steel bar?
The substitution principle of steel bars is equal section substitution and equal strength substitution. Therefore, we can not use round steel instead of thread steel.
Q:What kind of steel pipe is round steel?
First of all, this is the two concept, round steel solid, hollow steel pipe; secondly, the round bar is divided into hot rolling, forging and cold drawn three. Generally seamless steel pipe can be divided into hot rolling (extrusion), cold rolling (pull), heat expansion of the basic types of steel pipe. Hope to be of help to you
Q:Is round bar steel?
In actual engineering, it is not necessary to use steel bar instead of round steel, but it should not be reversed. In addition, the diameter of the round steel bar is generally not large, but the diameter of the round bar is very large.
Q:What is the difference between strip steel and round steel? Where are they mainly used?
Strip steel is a kind of narrow and long steel plate produced by various rolling mills to meet the needs of industrial production of various metal or mechanical products in different industrial sectors. Strip steel, also known as steel strip, is within 1300mm in width, and the length varies slightly according to the size of each roll. The strip is supplied in general, and has the advantages of high dimensional accuracy, good surface quality, easy processing and material saving. Same as steel plate, strip steel is divided into two kinds of ordinary strip steel and high quality strip steel according to the material used, and two kinds of hot-rolled strip steel and cold rolled strip steel according to processing method.Strip steel is widely used in the production of welded steel pipe, made of cold formed steel billet, manufacturing bicycle frame, rim, clamp, gasket, spring, saw blades, hardware and blades.
Q:What is the difference between 40Cr round steel and 40Cr steel forgings?
But 40Cr forgings are objects that are subjected to pressure by plastic deformation to shape a desired shape or suitable compressive force. (usually done by using hammers or pressure).
Q:What's the difference between pure iron round steel and electromagnetic pure iron bar?
It's another matter! So to sum up, the two are in principle a kind of thing! However, some of the small partners who are strong in pure iron are accustomed to using "round bar" to indicate some big caliber specifications. "Bar material" is used to indicate the specifications of small caliber.
Q:Is yuan steel round steel?
3 strength, steel and other steel with high strength low strength, namely, diameter of the same size as compared with other steel, round steel can bear the pulling force than other reinforced small, but the plastic steel reinforced bar is stronger than the other, there is a large deformation in the break before, and it reinforced the deformation the break before the much smaller.
Q:What is the difference between cast iron and round steel?
Cast iron is composed of iron ore by crushing and grinding into powder, into the furnace after high temperature calcination into liquid (commonly known as iron) and then poured into the special mould after cooling into ingot is also called billet or iron, iron is the main component of alloy is composed of iron, carbon and silicon.
Q:Round bar, flat steel, not reinforced?
Round steel: 5.5-25 mm small round bars are mostly supplied by straight strips. They are commonly used as reinforcing bars, bolts and various mechanical parts. They are more than 25 millimeters of round steel. They are mainly used in the manufacture of mechanical parts or as seamless steel tube billets.
Q:Special steel bar steel products used to do what
But the red hardness difference of this kind of steel, that is, when the working temperature is greater than 250 degrees, the hardness and wear resistance of steel will decline rapidly, and lose their ability to work. In addition, carbon tool steels, such as those made of larger parts, are difficult to harden and easy to produce

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