Description of AISI 4150 Alloy Steel Round Bar
SAE or AISI 4150 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. This tough steel alloy performs good strength, wear resistance, and great hardness. That means it must be heat-treated to be suitable for machining. It has high weldability and can be achieved through most commercial methods. Now AISI 4150 has been used in the aerospace, defense, oil and gas, and automotive industries.
Specifications of AISI 4150 Alloy Steel Round Bar
|
Grade
|
Cr %
|
Mo %
|
C %
|
Mn %
|
P % (max)
|
S % (max)
|
Si %
|
|
4150
|
0.80-1.10
|
0.15-0.25
|
0.48-0.53
|
0.75-1.00
|
0.035
|
0.04
|
0.15-0.35
|
|
Tensile strength
|
106000 PSI
|
|
Yield strength
|
55100 PSI
|
|
Elongation
|
20.2 %
|
|
Properties
|
Metric
|
Imperial
|
|
Tensile strength
|
731 MPa
|
106000 psi
|
|
Yield strength
|
380 MPa
|
55100 psi
|
|
Izod Impact
|
24 J
|
17.7 ft-lb
|
|
Bulk modulus (typical for steel)
|
140 GPa
|
20300 ksi
|
|
Shear modulus (typical for steel)
|
80 GPa
|
11600 ksi
|
|
Elastic modulus
|
190-210 GPa
|
27557-30458 ksi
|
|
Poisson's ratio
|
0.27-0.30
|
0.27-0.30
|
|
Elongation at break (In 50 mm)
|
0.202
|
0.202
|
|
Reduction of area
|
0.4
|
0.4
|
|
Hardness, Brinell
|
197
|
197
|
|
Hardness, Knoop (converted from Brinell hardness)
|
219
|
219
|
|
Hardness, Rockwell B (converted from Brinell hardness)
|
92
|
92
|
|
Hardness, Rockwell C (converted from Brinell hardness.)
|
13
|
13
|
|
Hardness, Vickers (converted from Brinell hardness)
|
207
|
207
|
|
Machinability (annealed and cold drawn; based on AISI 1212 as 100 machinabilities)
|
55
|
55
|
Applications of AISI 4150 Alloy Steel Round Bar
Typical uses for 4150 include:
- Shafts:
- Widely employed in the manufacturing of shafts for various machinery and industrial applications due to its high tensile strength and toughness.
- Aircraft Parts:
- Utilized in the aerospace industry for fabricating critical components requiring a combination of strength and fatigue resistance, ensuring reliable performance in aircraft systems.
- Drill Collars:
- Found in the oil and gas industry for constructing drill collars, where its durability and resistance to wear make it suitable for demanding drilling environments.
- Bolts:
- Used in the production of high-strength bolts for applications in construction, automotive, and machinery where robust fastening is essential.
- Couplings:
- Applied in the manufacturing of couplings for connecting rotating shafts in machinery, taking advantage of its strength and resilience.
- Valves:
- Employed in valve components for various industrial applications, benefiting from its hardenability and resistance to wear and corrosion.
- Sprockets:
- Utilized in the production of sprockets for conveying systems and machinery, where its toughness and wear resistance contribute to extended service life.
- Axles:
- Found in the fabrication of axles for automotive and industrial applications, providing the necessary strength and durability for load-bearing components.
- Forged Gears:
- Used in the manufacturing of gears for machinery, ensuring reliable and efficient power transmission due to its excellent hardenability and wear resistance.
