4340 Alloy Bar

4340 alloy steel bar is used heavily in the aerospace industry due to its ultra-high strength. When heat treated it is known for its toughness while preserving good fatigue strength. For highly stressed parts it is excellent choice. It can be machined by all customary methods. This material is available in both vacuum melt (VM) and air melt (AM).

Applications:

  • Aircraft Landing Gear
  • Power Transmission Gears
  • Structural Use Applications

Alloy Bar PDF Download

Filter Products

Don’t see what you need? Request a Quote

Specification
Manufacture Method
Grade
Diameter

Items 1-10 of 47 Products

Page
English Metric
per page
Set Descending Direction
SKU Description Manufacture Method Diameter Shape Specification
Sku: 07977 Description: 4340 AIR MELT AMS 6415 1.00 DIA Manufacture Method: Air Melt Diameter: 1.0000 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: 07971 Description: 4340 N&T VAC MELT AMS 6414 1.000DIA Manufacture Method: VACUUM ARC REMELT Diameter: 1.0000 Shape: ROD/BAR ROUND Specification: AMS6414
Sku: 08204 Description: 4340 AIR MELT AMS 6415 1.500DI Manufacture Method: Air Melt Diameter: 1.5000 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: 08227 Description: 4340 AIR MELT AMS 6415 4.000DIA Manufacture Method: Air Melt Diameter: 4.0000 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: 08169 Description: 4340 N&T VAC MELT AMS 6414 4.000DIA Manufacture Method: VACUUM ARC REMELT Diameter: 4.0000 Shape: ROD/BAR ROUND Specification: AMS6414
Sku: 08245 Description: 4340 AIR MELT AMS 6415 5.000DIA Manufacture Method: Air Melt Diameter: 5.0000 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: 08174 Description: 4340 VAC MELT N&T AMS 6414 5.000DIA Manufacture Method: VACUUM ARC REMELT Diameter: 5.0000 Shape: ROD/BAR ROUND Specification: AMS6414
Sku: 11465 Description: 4340 AIR MELT CD AMS6415 .500DI Manufacture Method: Air Melt Diameter: 0.5000 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: A6009 Description: 4340 AIR MELT AMS 6415 1.125DIA Manufacture Method: HOT FINISHED Diameter: 1.1250 Shape: ROD/BAR ROUND Specification: AMS6415
Sku: A5761 Description: 4340 AIR MELT AMS 6415 1.125DIA Manufacture Method: Air Melt Diameter: 1.1250 Shape: ROD/BAR ROUND Specification: AMS6415

Items 1-10 of 47 Products

Page
English Metric
per page
Set Descending Direction

Typical Chemical Properties
Minimum Properties Tensile Strength , psi 140,000
  Yield Strength, psi 120,000
  Elongation 14%
  Hardness Rc 32/39
Chemistry Carbon( C) .38 -.43%
  Chrome (Cr) 0.70- 0.90%
  Manganese (Mn) 0.60-0.80%
  Molybdenum (Mo) 0.20 - .30%
  Nickel ( Ni) 1.65-2.0%
  Phosphorus (P) 0.030%
  Sulphur (S) 0.040%
  Silicon (Si) 0.15- 0.35%