SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steel

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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:

SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steels       

1. Dia:12mm-300mm

2. Standard Performed: ASTM A29/A29M-04

3. Equal Standard:

    America Standard: AISI4140

    International Standard: 42CrMo4

    Japan Standard: SCM440

    Germany Standard: 42CrMo4

4. Chemical composition:

Grade

C

Si

Mn

P

S

Ni

Cr

 Mo

 Cu

 Al

AISI4140

0.38

0.41

0.15

0.35

0.85

1.00

 Max

0.015

 Max

0.040

 Max

0.25

0.80

1.10

0.15

0.25

 Max

0.35

 0.012

 0.030

5. Grade: ASTM A29  4140  42CrMo  SCM440 

    Hardness:217HB  

    Tensile  strength:1080(110)MPA  

    Yield  strength: 930(95)MPA 

    Elogation: 12%  

    Reduction of area: 45%   

    AKV(impact  value): 63J


SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 SteelSCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steel

SCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 SteelSCM440 SCM415 SAE4140 Steel Round Bar /AISI 4140 Steel


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Q:How many grades of steel are round steel?
There are many kinds of steel. They can be divided into three categories: non alloy steel, low alloy steel and alloy steel by chemical composition. Ordinary steels are mostly unalloyed steels. Their quality is divided according to the impurities in the steel, namely ordinary quality carbon steel, high quality carbon steel and special quality carbon steel three kinds. Not by category.
Q:How to distinguish a round bar from forging? Cold drawing? Hot rolling?
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. 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:What's the difference between bar and round bar?
Bars can be either round or square or six sides.Another argument is that bars usually refer to short ones. The rounds are not cut, usually 6 meters long supply.
Q:Why can't the grounding device be replaced by steel bar instead of round steel?
Steel is known as hot rolled ribbed bar. Ordinary hot rolled steel bars are made up of HRB and the minimum yield point of the brand. H, R, and B are the first letters in English for hot-rolled (Hotrolled), ribbed (Ribbed) and reinforced (Bars) three words. Hot rolled ribbed bar is divided into two levels, HRB335 (old No. 20MnSi), three HRB400 (20MnSiV, 20MnSiNb, old No. 20Mnti), four grade HRB500 three grade.
Q:What's the difference between a round tube and a round tube?
Round steel is solid and round tubes are hollow
Q:What is the difference between common wire and high-speed wire?
P line: refers to the use of "ordinary mill (usually open-train double wire rod rolling mill)". The rolling speed of 20-60 meters per second, per root weight (disc) in 0.4-0.6 tons (market show is generally three root six head is a market), in the rolling process can only be cooled by air cooling or air cooling line to ensure product performance.
Q:Are lightning checks required for galvanized steel, flat steel and round steel?
No, when purchasing hot galvanized round steel and flat steel, please offer the factory certificate and inspection certificate.
Q:Q235 and mechanical properties of hot rolled steel cold drawn steel have what difference, Q235 hot rolled steel with 12 combined shearing machine has a number of very hard, the damage of the blades, why
Secondly, have a great relationship with the mechanical properties of heat treatment of steel, quenching hardness increased, annealing hardness decreases, the same kind of material of steel under different heat treatment, the hardness difference is very big, you said the hot bar is excellent, there may have been a quenching in the production process
Q:Difference between round bar and threaded steel in use.
Because steel for low alloy steel, its price is higher than that of low carbon steel, or construction units, design units, often on the general civil construction of the "practical" point of view, reduce the quality of the project, and the use of low carbon steel instead of rebar. For large engineering projects, often bribed "project inspector after" to replace "Choulianghuanzhu rib steel bar, reduce the construction cost.
Q:Specifications of the same kind of galvanized round bar more expensive than round steel?
The general market price than ordinary steel galvanized steel bar of your 2000-3000 dollars per ton, according to your purchase requirements, price range of relatively large fluctuations, such as whether to open a formal invoice, transport distance, purchase quantity, relationship with your level of economic development, the developed area of fierce market competition, the price is relatively low. The prices and prices of large factories and small factories are not the same. The prices of big factories are generally high, and the prices of small factories are low.

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