Carbon Alloy Steel Round Bars AISI 4140

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Min Order Qty:
30 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

Carbon Alloy Steel Round Bars AISI 4140     

Technical Paramenters 

Chemical Composition

Mechanical Properties (In Quenched & Tempered State)

C

0.38-0.43 %

Tensile strength(MPA) 

≥1080(110)

Si

0.15-0.35%

 Yield strength (MPA)

≥930(95)

Mn

0.75-1.00 %

 Elongation (δ5/%)

≥12

Cr

0.80-1.10 %

 Reduction in Area (ψ/%)

45

Ni

≤0.030 %

 Impact  (J)

 63

P

≤0.030 %

 Impact toughness value αkv (J/cm2)

≥78(8)

S

≤0.040 %

 Hardness 

≤217HB

Cu

≤0.030 %



Mo

0.15-0.25 %




Products Show 

 


Standard Grades  

 

Werkstoff-NO.

DIN-EN

DIN-Abbreviation

SAE/AISI

1.1545

10096

C 105 W1

W110

1.1730

10096

C 45 W

--

1.2063

10096

145Cr6

-

1.2067

10096

100Cr6

L1/L3

1.2080

10096

X210Cr12

D3

1.2101

10096

62SiMnCr4

-

1.2210

10096

115CrV3

L2

1.2363

10096

X100CrMoV5 1

A2

1.2379

10096

X155CrVMo12

D2

1.2419

10096

105WCr6

-

1.2436

10096

X210CrW12

D6

1.2510

10096

100MnCrW4

O1

1.2542

10096

45 WCrV7

S1

1.2550

10096

60WCrV7

S1

1.2601

10096

X165CrMoV 12

-

1.2721

10096

50 NiCr13

-

1.2826

10096

60MnSiCr4

-

1.2842

10096

90MnCrV8

O2







Chemical Elements:











Grade

C

Si

Mn

P≤

S≤

Cr

Mo

V

W

OTHER

1.2344/SKD61/H13

0.35-0.42

0.80-1.20

0.25-0.50

0.03

0.02

4.80-5.50

1.00-1.50

0.80-1.15


Cu≤0.25 Ni≤0.25

4Cr5MoSiV1

0.32-0.42

0.80-1.20

0.20-0.50

0.030

0.030

4.75-5.50

1.10-1.75

0.80-1.20



1.2379/D2/SKD11

1.50-1.60

0.10-0.40

0.15-0.45

0.030

0.030

11.0-12.0

0.60-0.80

0.90-1.10



1.2510/O1/SKS3

0.85-1.0

0.10-0.50

1.0-1.40

0.030

0.030

4.75-5.50


≤0.30

0.4-0.6



1.2363/A2/SKD12

0.95-1.05

0.10-0.50

0.40-1.00

0.030

0.030

4.75-5.50

0.90-1040

0.15-0.50




4140

0.38-0.43

0.15-0.35

0.75-1.00

0.035

0.040

0.80-1.10

0.15-0.25




4340

0.38-0.43

0.15-0.35

0.60-0.80

0.035

0.040

0.70-0.90

0.20-0.30



Ni 1.65-2.00

P20/1.2330/M202

0.28-0.40

0.20-0.80

0.60-1.00

0.030

0.030

1.40-2.00

0.30-0.55





Work Shop 

 Carbon Alloy Steel Round Bars AISI 4140


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: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:Why is it better to use round steel than flat steel in lightning protection?
From the cross section, thermal stability as long as meet the discharge current can be, but from the lightning protection downlead selection, selection of round steel in order to prevent the tip discharge, so we generally do not choose flat edges as grounding, buried in the earth round and not flat how much difference, but in the case of the same section
Q:What are square steel, rectangular tube, angle steel or light steel?
Light steel is also a relatively vague term, generally can have two kinds of understanding. One is the current "code for design of steel structures" (GBJ 17-88) in the eleventh chapter "bar, small angle light steel structure", refers to the use of steel and light steel structure is less than L45*4 and L56*36*4 angle steel production, mainly in the lack of time for small steel structure manufacturing of reinforced concrete structure should not be used, has been basically not used, so the revised code for design of steel structures has been basically removed this tendency. The other is the "Regulations" technology of steel structure of light-weight buildings with gabled frames with light roof and wall light (also has the condition to use the masonry wall) single portal frame structure, the light here mainly refers to the enclosure is made of light material. Since the former has been cancelled soon, the meaning of "light steel" mainly refers to the latter
Q:What kind of nuts do you need for round 20 rounds?
Common materials for 301, 304, 303, 316, 316L, 304L, 321, 2520, 201, 202 and so on. Specifications are expressed in diameter, such as "50", which means a round bar of 50 millimeters in diameter. Round bar is divided into three parts: hot rolling, forging and cold drawing. Standard Specification for hot rolled round steel is 5.5-250 mm.Stainless steel round bar has a broad application prospect, and is widely used in hardware, kitchenware, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, aerospace and other architectural decoration. Equipment, chemicals, dyes, paper making, oxalic acid, fertilizer, etc.; equipment for photography, food industry, coastal areas, ropes, CD poles, bolts, nuts, etc..
Q:Is the shear wall concealed column stirrup steel or round steel?
Now the shear walls, columns and stirrups are basically round steel bars, and their requirements are as follows: 6.5~12 mm in diameter steel bars, most of the reel into a disk; 12~40 mm in diameter, usually 6~12 meters long straight bar. I grade steel (Q235 steel) are rolling for smooth circular section, supply form of material, diameter of not more than 12mm, the length is 6m~12m.
Q:The difference between galvanized round bar and galvanized flat steel?
Round steel (grade 1 steel) belongs to ordinary low carbon steel with low strength. However, the plasticity of the round bar is stronger, that is, the round steel has a larger deformation before it is pulled off.It has been widely used in the fields of hardware, construction, automobile, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, space, etc.. The most extensive machining of general machine parts, general rod type steel parts, CD pole, bolt, nut.Refers to the galvanized flat steel width 12-300mm, thickness 4-60mm, cross section is rectangular and with pure edge of galvanized steel. Galvanized flat steel can be finished steel, also can be galvanized pipe blank and galvanized belt. With high strength, light structure: strong grid welding structure, so that it has high load, light structure, easy lifting and other features, beautiful appearance, durable.
Q:How can stainless steel rounds occur? Is it a quality problem?
Cracks caused by inclusions in steel, cracks and steel surface of a certain angle, about 1 ~ 2.5mm, slightly decarburization on both sides, decarburization layer 0.10 ~ 0.15mm. There are inclusions on both sides of the crack and in the tail, and the ferrite band is formed
Q:Is round bar steel?
For example, the steel structure material is Q235B, and the steel bar is HPB235. Although the strength is the same, the production process is still different, the requirements of higher steel bar, there is a new specification more stringent.
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
Q:Could you tell me what is the difference between steel pipe and round steel?
Steel tube or conventional weapons indispensable materials, barrel, barrel to steel pipe manufacturing. The steel pipe can be divided into round tube and special-shaped pipe according to the cross sectional area and shape. Because of the condition of equal circumference, the circle surfaceThe product is the largest and uses round tubes to hold more fluids. In addition, the ring section is subjected to an average force when it is subjected to internal or external radial pressure, so most steel tubes are round tubes.

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