8740 Alloy Bar

8740 is a Nickel Chrome Moly produced for case hardening. It can often be found in aerospace applications, when wear resistance, toughness, and strength are needed.

Applications:

  • Aerospace Engine Parts
  • Aerospace Subassemblies
  • Aerospace Fasteners

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Manufacture Method
Diameter

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SKU Description Manufacture Method Diameter Shape Specification
Sku: A5649 Description: 8740 AMS6322 HR ANN 1.250 DIA Manufacture Method: Air Melt Diameter: 1.2500 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: A5903 Description: 8740 AMS6322 HR ANN LCS 1.00 DIA Manufacture Method: HOT ROLLED Diameter: 1.0000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50745 Description: 8740 AMS 6322 HR ANN LCS 1.500 DIA Manufacture Method: Air Melt Diameter: 1.5000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50756 Description: 8740 AMS 6322 HR ANN LCS 4.00 DIA Manufacture Method: Air Melt Diameter: 4.0000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50747 Description: 8740 AMS 6322 LCS 2.00 DIA Manufacture Method: Air Melt Diameter: 2.0000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50750 Description: 8740 AMS 6322 HR ANN LCS 2.250 DIA Manufacture Method: Air Melt Diameter: 2.2500 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50910 Description: 8740 AMS 6322 HR ANN LCS 3.25 DIA Manufacture Method: Air Melt Diameter: 3.2500 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 50752 Description: 8740 AMS 6322 HR ANN LCS 3.00 DIA Manufacture Method: Air Melt Diameter: 3.0000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: 75224 Description: 8740 AMS 6322 HR ANN LCS 3.500 DIA Manufacture Method: Air Melt Diameter: 3.5000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01
Sku: A2348 Description: 8740 AMS 6322 HR ANN LCS 5.50 DIA Manufacture Method: Air Melt Diameter: 5.5000 Shape: ROD/BAR ROUND Specification: AMS6322 R ASQR-01

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Typical Chemical Properties
Minimum Properties Tensile Strength , psi 167,000
Yield Strength, psi 152,000
Elongation 15%
Hardness bhn 229
Chemistry Carbon( C) .38 -.43%
Chrome (Cr) 0.40-0.60 %
Manganese (Mn) 0.75-1.00 %
Molybdenum (Mo) 0.20 - .30%
Nickel ( Ni) 0.40 -0.70%
Phosphorus (P) .035% max
Sulphur (S) 0.04% max
Silicon (Si) 0.15- 0.30%