Gold Member Since 2012
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Qingdao Jiahexin Steel Co., Ltd.

Steel Round Bar, Solid Round Bar, 40cr Steel Bar manufacturer / supplier in China, offering Carbon Alloy Solid Round Bar AISI 4140 SAE4140, Hot Sale Great Quality Roof Sandwich Panel, The Low Cost Steel Structure Chincken House and so on.

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Supplier Homepage Product Steel Bars Carbon Alloy Solid Round Bar AISI 4140 SAE4140

Carbon Alloy Solid Round Bar AISI 4140 SAE4140

Purchase Qty.:
(Tons)
10-19 20+
FOB Unit Price: US $600 US $700
Purchase Qty. (Tons) FOB Unit Price
10-19 US $600
20+ US $700
Get Latest Price
Production Capacity: 100000 Mt Per Year
Transport Package: Standard Export Packing
Payment Terms: L/C, T/T, D/P

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Basic Info
  • Model NO.: Dia: 3.2mm-500mm
  • Standard: AISI, ASTM, GB, JIS, DIN
  • Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
  • Alloy: Alloy
  • Origin: Qingdao, China
  • Type: Alloy Steel Bar
  • Technique: Hot Rolled
  • Surface Treatment: Coated
  • Trademark: Jiahexin steel
Product Description
Alloy steel bar--AISI/SAE 4140, 4340, 8620, 8640, 5120, 5140, etc 

1. Dia: hot rolled 12mm-250mm, forged: 60mm-800mm
2. Length: 2000-5800mm 
3. Process: EAF + LF + VD 
4. Heat treatment: Normalized / Annealed / Quenched / tempered 
5. Delivery condition: Hot forged, black surface or Turned (optional), rough machined(optional) 
6. Technical Data: Chemical Composition, Physical Properties and Mechanical Testing according to the customer's requirement 
7. Test: Ultrasonic test according to SEP 1921-84 G3 C/c 


 

Size of AISI 4140 Steel Round Bar

Round bar
Diameter(mm)Length (mm)
   

20~800

3000~9000

   

Plate

Thickness(mm) 

Width (mm)  

Length (mm)   

Max:800

Max:2200

Max:9000

The special size can be customized.

 Chemical Compositions

Grade

C

Si

Mn

P

S

Cr

Mo

Ni

42CrMo

0.38~0.45

0.17~0.37

0.50~0.8

≤0.035

≤0.035

0.9~1.2

0.15-0.25

≤0.3

4140

0.40~0.45

0.15~0.35

0.75~1.0

≤0.035

≤0.040

0.8~1.1

0.15-0.25

-

SCM44

0.38~0.43

0.15~0.35

0.60~0.9

≤0.030

≤0.030

0.9~1.2

0.15-0.30

≤0.25
1.72250.38~0.45≤0.400.60~0.9≤0.025≤0.0350.9~1.2
0.15-0.30

 

Features of AISI 4140 alloy steel

1, Chromium molybdenum alloy steel 

2, Slightly higher carbon content then 4130

3, Greater strength and heat treatment 

Typical Applications 

1, Applications in the oil and gas sector

2, Connection rods, collets, conveyor pins, 

3, Gears, stem assemblies, 

4, Pump shafts and tool holders

 
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