Topics CoveredIntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Heat Treatment Forging AnnealingApplications
Alloy steels are designated by AISI four-digit numbers. They are more susceptible to mechanical and heat treatments than carbon steels. They comprise different types of steels with compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels.
The datasheet given below provides more details about AISI 6150 alloy steel.
The chemical composition of AISI 6150 alloy steel is listed in the following table.
||97.095 - 97.72|
||0.800 - 1.10|
||0.7 - 0.9|
||0.480 - 0.530|
||0.150 - 0.3|
The following table shows the physical properties of AISI 6150 alloy steel.
The mechanical properties of AISI 6150 alloy steel are outlined in the following table.
|Tensile strength, ultimate
|Tensile strength, yield
|Modulus of elasticity
|Shear modulus (typical for steel)
|Bulk modulus (typical for steel)
|Poissons ratio (calculated)
||0.27 – 0.30
|Elongation at break (in 50 mm)
|Hardness, Vickers (converted from Brinell hardness)
|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)
|Machinability (annealed and cold drawn. Based on 100% machinability for AISI 1212 steel)
The thermal properties of AISI 6150 alloy steel are outlined in the following table.
||323 BTU in/hr.ft2. °F|
Other designations that are equivalent to AISI 6150 alloy steel include the following.
||ASTM A519 (6150)
||SAE J404 (6150)
||ASTM A752 (6150)
||SAE J412 (6150)
||B.S. 735 A 50|
||ASTM A29 (6150)
||AFNOR 50 CV 4
||B.S. En. 47|
||ASTM A322 (6150)
||ASTM A331 (6150)
||SAE J1397 (6150)
||UNI 5OCrV 4
Fabrication and Heat Treatment
The machinability rating of 6150 alloy steel is 59.
AISI 6150 alloy steel can be welded using any common welding methods. However, preheating and post weld stress relieving have to performed for welding this steel.
AISI 6150 alloy steel is hardened at 871°C (1600°F). This steel is tempered followed by normalizing at 899°C (1650°F) and then air cooled.
Forging of 6150 alloy steel is performed at 1204°C (2200°F).
AISI 6150 alloy steel is annealed at 843°C (1550°F) and then air cooled.
The following are the major applications of 6150 alloy steel: