AISI 4130 Alloy Steel (UNS G41300)
AISI 4130 alloy steel contains chromium and molybdenum as strengthening agents. It has low carbon content, and hence it can be welded easily. The datasheet given below provides more details about AISI 4130 alloy steel.
Chemical Composition
Element Content (%)
Iron, Fe 97.03 – 98.22
Chromium, Cr 0.80 – 1.10
Manganese, Mn 0.40 – 0.60
Carbon, C 0.280 – 0.330
Silicon, Si 0.15 – 0.30
Molybdenum, Mo 0.15 – 0.25
Sulfur, S 0.04
Phosphorous, P 0.035
Mechanical Properties
Properties
Tensile strength, ultimate
Tensile strength, yield
Modulus of elasticity
Bulk modulus (Typical for steel)
Shear modulus (Typical for steel)
Poissons ratio
Elongation at break (in 50 mm)
Reduction of area
Hardness, Brinell
Hardness, Knoop (Converted from Brinell hardness)
Hardness, Rockwell B (Converted from Brinell hardness)
Hardness, Rockwell C (Converted from Brinell hardness,
value below normal HRC range, for comparison purposes only.)
Hardness, Vickers (Converted from Brinell hardness)
Machinability (Annealed and cold drawn.
Based on 100% machinability for AISI 1212 steel.)
Fabrication and Heat Treatmen
Machinability
AISI 4130 steel can be easily machined using conventional methods. However, machining becomes difficult when the hardness of the steel is increased.
Forming
Forming of AISI 4130 steel can be performed in the annealed condition.
Welding
Welding of AISI 4130 steel can be performed by all commercial methods.
Heat Treatment
AISI 4130 steel is heated at 871°C (1600°F) and then quenched in oil. This steel is usually heat-treated at temperatures ranging from 899 to 927°C (1650 to 1700°F).
Forging
Forging of AISI 4130 steel can be performed can be performed at 954 to 1204°C (1750 to 2200°F).
Hot Working
Hot working of AISI 4130 steel can be done at 816 to 1093°C (1500 to 2000°F).
Cold Working
AISI 4130 steel can be cold worked using conventional methods.
Annealing
AISI 4130 steel can be annealed at 843°C (1550°F) followed by air cooling at 482°C (900°F).
Tempering
Tempering of AISI 4130 steel can be performed at 399 to 566°C (750 to 1050°F), depending on the desired strength level.
Hardening
Hardening of AISI 4130 steel can be done with cold working or heat treatment.
Applications
The following are some of the major applications of AISI 4130 alloy steel:
Aircraft engine mounts
Welded tubing
