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4340 Steel Properties & Composition
General Information
Cast Alloy Designation:
10Q(4340)
Alloy family:
Carbon and Low Alloy
UNS #:
J24053
ASTM Standard(s):
A732
A915
Wrought:
4340
Chemical Composition
C:
0.35-0.45
Mn:
0.70-1.00Cr:
0.70-0.90Mo:
0.20-0.30Ni:
1.65-2.00Fe:
94.85-96.40Cu:
0.00-0.50Mechanical Properties
Tensile strength (ksi):
0.00-180.00Yield strength (ksi):
145
Elongation (%):
5
Hardness (Brinell):
0.00-0.00