Special Steel Round Bar AISI 4140 Alloy Steel

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China main port
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TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
10000 m.t./month

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Item specifice:

Type: Alloy Steel Shape: Steel Round Bar Standard: GB,JIS,ASTM,AISI,BS,EN,API,DIN
Technique: Forged,ERW,Cold Rolled,Hot Rolled,Cold Drawn,Spring,EFW,Extruded Surface Treatment: Dry,Chromed Passivation,Polished,Bright,PVDF Coated,Oiled,Color Coated,Copper Coated,Coated,Galvanized,Black Thickness: as required
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,BV,IBR,RoHS,CE,API,BSI,UL Shape: Round,Hexagonal,C Channel,Square,U Channel
Length: as required Net Weight: as required

Product Description:

Special Steel Round Bar AISI 4140 Alloy Steel 

1.4140/1.7225/42CrMo4/SCM440/EN19
2.good price and fast delivery time
3.large stocks  

 

Equivalent grades                                              

GB

DIN

AISI

JIS

42CrMo

1.7225

 4140

SCM440

 

 

Chemical Composition                                                                                     

C

Si

Mn

Cr

 Mo

P

S

0.38-0.43

0.40max

0.60-0.90

0.90-1.20

0.15-0.30

0.035

0.035

 

 

Available size                                                                                    

Round steel bar 10-800mm

Flat steel bar 25-400mm*200-800mm

 

 

Surface condition                                                                          

Black surface/ Grinded/ Machined

 

Hardness                                                               

Annealed HBS 217 max

 

Characteristics                                                                                

4140 Alloy Steel/SAE 4140 Steel Price is engineering steel supplied in quenched and tempered conditions. Very good machinability. High toughness. High creep strength. Repeated impact resistant capability.

 

Applications                                                                                      

4140 Alloy Steel/SAE 4140 Steel Price  is use to producecomponents with high requirements on toughness, e.g. gear wheels, pinions, connecting rods, parts for mechanical engineering .

 

Heat treatment                                                      

ForgingHeat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc.
AnnealingHeat to 830°C-850°C.Cool in furnace.
NormalisingHeat to 870°C-900°C.Cool in still air.
Stress RelievingAnnealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air.
HardeningHeat to 830°C-880°C. Quench in oil or polymer.
TemperingHeat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided.


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Special Steel Round Bar AISI 4140 Alloy Steel

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2, Test & Certificate?

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

3, Payment Terms?

    30% TT as deposit and 70% before delivery.

    Irrevocable L/C at sight.

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    EXW, FOB, CIF, FFR, CNF

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

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