SAE-AISI 5145 (G51450) Chromium Steel
SAE-AISI 5145 steel is an alloy steel formulated for primary
forming into wrought products. Cited properties are appropriate for
the annealed condition. 5145 is the designation in both the SAE and
AISI systems for this material. G51450 is the UNS number.
The graph bars on the material properties cards below compare
SAE-AISI 5145 steel to: SAE-AISI wrought steels (top), all iron
alloys (middle), and the entire database (bottom). A full bar means
this is the highest value in the relevant set. A half-full bar
means it's 50% of the highest, and so on.
AISI 5145 is a Standard grade Alloy Steel. It is commonly called AISI 5145 Chromium steel. It is composed of
(in weight percentage) 0.43-0.48% Carbon (C), 0.70-0.90% Manganese
(Mn), 0.035%(max) Phosphorus (P), 0.04%(max) Sulfur (S), 0.15-0.30%
Silicon (Si), 0.70-0.90% Chromium (Cr), and the base metal Iron
(Fe). Other designations of AISI 5145 alloy steel include UNS
G51450 and AISI 5145.
Steel is the common name for a large family of iron alloys. Steels
can either be cast directly to shape, or into ingots which are
reheated and hot worked into a wrought shape by forging, extrusion,
rolling, or other processes. Wrought steels are the most common
engineering material used, and come in a variety of forms with
different finishes and properties. Alloy steels are steels that
exceed the element limits for Carbon steels. However, steels
containing more than 3.99% chromium are classified differently as
stainless and tool steels. Alloy steels also includes steels that
contain elements not found in carbon steels such as nickel,
chromium (up to 3.99%), cobalt, etc.
The typical elastic modulus of alloy steels at room temperature
(25°C) ranges from 190 to 210 GPa. The typical density of alloy
steels is about 7.85 g/cm3. The typical tensile strength varies between 758 and 1882 MPa. The
wide range of ultimate tensile strength is largely due to different
heat treatment conditions.
