Carbon Alloy Solid Round Bar AISI 4140 SAE4140

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Coated
• Alloy: Alloy
• Model NO.: Dia: 3.2mm-500mm
• Transport Package: Standard Export Packing
• Trademark: Jiahexin steel
• Origin: Qingdao, China
• Production Capacity: 100000 Mt Per Year

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
1.7225	0.38~0.45	≤0.40	0.60~0.9	≤0.025	≤0.035	0.9~1.2	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