Contacts

SAE 4140 Bright Bar Chemical composition:

SAE 4140 is a low-alloy steel that contains chromium, molybdenum, and manganese. The following table shows the chemical composition of SAE 4140.

Element	Percentage
Carbon	0.38 – 0.43
Manganese	0.75 – 1.00
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.15 – 0.35
Chromium	0.80 – 1.10
Molybdenum	0.15 – 0.25

Please note that these values may vary slightly depending on the specific grade of SAE 4140 steel you are using. It’s also worth noting that these values are just a guideline, and the actual composition of the steel may vary depending on the manufacturer and production process.

 

SAE 4140 Bright Bar Physical Properties:

Here are some of the physical properties of SAE 4140 steel:

• Density: 7.85 g/cm^3
• Melting point: 1460°C
• Thermal conductivity: 45.9 W/m·K
• Elastic modulus: 190-210 GPa
• Poisson’s ratio: 0.27-0.30
• Tensile strength: 565 MPa
• Yield strength: 355 MPa
• Hardness (Brinell): 217-269 HB

Again, these values may vary slightly depending on the specific grade of SAE 4140 steel you are using. It’s also worth noting that these values are just a guideline, and the actual physical properties of the steel may vary depending on the manufacturer and production process.

 

SAE 4140 Bright Bar Mechanical Properties:

Here are some of the mechanical properties of SAE 4140 steel:

• Tensile strength: 565 MPa
• Yield strength: 355 MPa
• Elongation: 18%
• Reduction of area: 50%
• Impact energy: 35 J

Tensile strength is the maximum amount of stress that a material can withstand before breaking or failing. Yield strength is the amount of stress at which a material begins to deform plastically. Elongation is a measure of the material’s ability to stretch before breaking. Reduction of area measures the material’s ability to undergo plastic deformation. Impact energy is a measure of the material’s ability to absorb energy when it is subjected to a load.

It’s important to note that these values are just a guideline, and the actual mechanical properties of SAE 4140 steel may vary depending on the specific grade of steel you are using and the manufacturing process used to produce it.

 

SAE 4140 Bright Bar shapes

SAE 4140 steel is available in a wide range of shapes, including:

• Rounds: SAE 4140 steel is available in round bar form with diameters ranging from 6 mm to 500 mm.
• Flats: SAE 4140 steel is available in flat bar form with thicknesses ranging from 3 mm to 100 mm and widths ranging from 25 mm to 600 mm.
• Hexagons: SAE 4140 steel is available in hexagonal bar form with sides ranging from 6 mm to 55 mm.
• Squares: SAE 4140 steel is available in square bar form with sizes ranging from 6 mm to 120 mm.
• Plate: SAE 4140 steel is available in plate form with thicknesses ranging from 6 mm to 200 mm and widths ranging from 900 mm to 3,000 mm.
• Sheet: SAE 4140 steel is available in sheet form with thicknesses ranging from 0.5 mm to 6 mm and widths ranging from 900 mm to 2,000 mm.
• Strip: SAE 4140 steel is available in strip form with thicknesses ranging from 0.5 mm to 3 mm and widths ranging from 25 mm to 600 mm.
• Wire: SAE 4140 steel is available in wire form with diameters ranging from 0.5 mm to 10 mm.

SAE 4140 steel is also available in the form of forgings, which are shaped by deforming the steel using pressure or hammering.

 

SAE 4140 Bright Bar Sizes

SAE 4140 steel is available in a wide range of sizes, as mentioned in the previous answer. The size of the SAE 4140 steel depends on the shape in which it is available.

For example, SAE 4140 steel round bars are available in diameters ranging from 6 mm to 500 mm. SAE 4140 steel flat bars are available in thicknesses ranging from 3 mm to 100 mm and widths ranging from 25 mm to 600 mm. SAE 4140 steel hexagonal bars are available with sides ranging from 6 mm to 55 mm. SAE 4140 steel square bars are available in sizes ranging from 6 mm to 120 mm. SAE 4140 steel plates are available in thicknesses ranging from 6 mm to 200 mm and widths ranging from 900 mm to 3,000 mm. SAE 4140 steel sheets are available in thicknesses ranging from 0.5 mm to 6 mm and widths ranging from 900 mm to 2,000 mm. SAE 4140 steel strips are available in thicknesses ranging from 0.5 mm to 3 mm and widths ranging from 25 mm to 600 mm. And SAE 4140 steel wire is available in diameters ranging from 0.5 mm to 10 mm.

Again, these are just rough guidelines and the actual size of the SAE 4140 steel may vary depending on the manufacturer and the specific grade of steel you are using.

 

SAE 4140 Bright Bar Equivalent Grades

SAE 4140 steel is a low-alloy steel that is widely used in the manufacturing of a variety of mechanical components. It is similar to other alloy steels such as AISI 4140, DIN 1.7225, and JIS SCM440. Here are the equivalent grades for SAE 4140 steel:

• AISI 4140: This is the most commonly used grade of SAE 4140 steel. It is equivalent to DIN 1.7225 and JIS SCM440.
• DIN 1.7225: This is a German standard for SAE 4140 steel. It is equivalent to AISI 4140 and JIS SCM440.
• JIS SCM440: This is a Japanese standard for SAE 4140 steel. It is equivalent to AISI 4140 and DIN 1.7225.

It’s important to note that these grades are not exact equivalents, and the actual chemical and mechanical properties of the steel may vary slightly depending on the specific grade and manufacturer. However, these grades are generally considered to be equivalent and can be used interchangeably in most cases.