Quenched and Tempered Steel SAE4140 SAE4145 SAE4340 SCM440 42CrMoS4 708M40 Steel Round Bar

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
30 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

Quenched and Tempered Steel SAE4140 SAE4145 SAE4340 SCM440 42CrMoS4 708M40 Steel Round Bar                                                 

Products Details 

1. Chemical Composition and Mechanical Properties(In Quenched & Tempered State)

Material

4140

Chemical Composition

Mechanical Properties(In Quenched & Tempered State)

C

0.38-0.45

Tensile strength(MPA) 

≥1080

Si

0.17-0.37

Yield strength (MPA)

≥930

Mn

0.50-0.80

Elongation(δ5/%)

12

Cr

0.90-1.20

Reduction in Area (ψ/%)

45

Mo

0.15-0.25

Impact  (J)

63

P

≤0.035

 

Hardness  

 

≤217HB

S

≤0.035

Cu

≤0.30

Ni

≤0.30

 

2. Product Application Areas

Our products have been used in all kinds of areas, such as aviation,aerospace,navigation,nuclear energy,chemical industry,electronic information,achine manufacture, petrochemical, automotive,instrument and meter, Communication ,transportation, and medical instruments, etc.

 

3. Similar steel grade & equivalent steel materials

USA

Japanese

Gemany

British

France

International

Chinese

ASTM&AISI&SAE

JIS

EN DIN

EN BS

EN NF

ISO

GB

4140

SCM440

42CrMo4

1.7225

42CrMo4

1.7225

42CrMo4

1.7225

------

42CrMo

 

Product Sales Information

Material

4140 steel round bar

Size

Diameter:20mm-1000mm

Length:500mm-6000mm

Origin place 

Made In China

Delivery Condition

Hot rolled,cold drawn,forged

Surface require

Black,grinding,bright,polish

Heat treatment

Quenched,Tempered,annealed

Packing

seaworthy packing ,wooden case ,carton,woven bag or at client's requires

Delivery time

In 10-50 days

Trade Term

EXW,FOB,CIF

Payments

T/T or L/C at sight

Port

China main Port,such as shanghai,Dalian,Shenzhen port.

MOQ

1 Ton

 

Company Main Products

Alloy Steel

4140, 4142, 42CrMo4, 1.7225, SCM440, 4130, SCM430, 25CrMo4, 1.7218, 34CrNiMo6,

1.6582, 4340, SNCM439, 36CrNiMo4, 1.6511, SACN645, 1340, SMn438, SNC236,

Tool Steel

H13, 1.2344, SKD61, D2, SKD11, 1.2379, 1.2510, 01, SKS3, 95MnWCr5, D3, SKD1, 1.2419,

SKS31, H21, SKD5, 1.2581, P20, 35CrMo7, 1.2738, 1.2316, M2

Bearing Steel

GCr15, 52100, SUJ1, SUJ2, 100Cr6, 1.2067, 55C, 8620, 4320, 9310, 440C, M50

Spring Steel

9260, SUP6, SUP7, 1.7108, 54SiCr6, 1.7102, 5155, SUP9, 1.7176, 5160, 1.7177, 6150,

SUP10, 51CrV4, 1.8159

Stainless Steel

321, sus321, 1.4541, 304, SUS304, 1.4301, 410, SUS410, 1.4006, 420, 1.4021, 1.4028,

434, 1.4113, 316L, SUS316L, 1.4435, 630, 1.4542, 431, 1.4057,

 

Products Show 

 


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 

 

 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


Send a message to us:

Remaining: 4000 characters

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- Inquire about price/MOQ

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 is the difference between 40Cr round steel and 40Cr forging parts?
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). The casting process constructed a fine grain structure and improved the physical properties of the metal.
Q:What is the difference between steel and flat steel, round steel and steel?
On the whole, the square section is square, flat section is rectangular, steel surface after finishing the round steel or steel wire (also called steel, silver bar).
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:12mm Round steel, the material is Q235, the maximum weight can bear?
The cross sectional area of 12mm steel is 3.14*36=113.04 mm, the maximum can bear much weight: 113.04*235=26564.40 cattle, is about 26.56440 kn.
Q:Are more bars used in high-rise buildings?
Look at the architectural design requirements and seismic grade, light steel reinforcement is mainly stirrups, columns, beams, shear walls generally use thread steel, plate bars and distribution bars are generally cold and twisted steel bars
Q:How do you know the diameter and weight of a round bar?
Round is a round, the quality of its G (in grams) is equal to the volume multiplied by the density of 7.85 steel, and its volume is equal to the bottom area multiplied by the degree of L (in cm), then the bar diameter of d=4 * G / L / 7.85 / 3.14 value points
Q:What kind of material is the first round steel?
Standard Specification for hot rolled round steel is 5.5-250 mm. Where: 5.5-25 mm small round steel mostly straight bundles of supply, used for steel, bolts and various mechanical parts; greater than 25 mm round steel, seamless steel pipe is mainly used for the manufacture of mechanical parts of the tube, etc..
Q:Do you need paint for roof lightning proof steel bars?
If the metal surface is coated with a thick layer of insulating paint, it will seriously affect the flashover effect. In the national standard, the metal roof is directly used as a flash receiver. The thickness of the paint used on the roof must be less than the required value. That is what it means.
Q:Lightning protection earthing zinc plating flat iron and round steel welding method, need to flat iron wrapped in round steel outside welding?
The flat steel is not required to be wrapped outside the round bar, and the round steel can be directly welded on the flat steel, and the welding joint area can not be smaller than round steel or flat steel, and the section is a cross section

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