Grade 40 rebar | Grade 40 rebar diameter | Grade 40 rebar tensile strength | Grade 40 rebar yield strength | Grade 40 rebar in mpa | Grade 40 rebar weight | Grade 40 rebar weight per foot | Grade 40 rebar marking | Grade 40 rebar colour.

Steel rebar, or reinforcing bar, is a bar that’s used to reinforce the concrete structure and strengthen tensile strength of concrete. It’s typically made of steel, although fiberglass is also popular for certain projects because it doesn’t corrode and is non-magnetic.

Standard rebar sizes vary by country. metric size and imperial size are two popular measurements, imperial sizes used in USA and metric sizes in all country. There are many steel rebar sizes, grades, and types to support a variety of structures. In the United States, common specifications are published by the American Concrete Institute (ACI) and American Society for Testing and Materials (ASTM).

Each imperial rebar diameter increases by 1/8 inch. To calculate imperial rebar sizes in inches you can multiply the bar size by 1/8 to get the nominal diameter in inches. For example, #8 rebar = 8/8 inches (or 1 inch) in diameter.

Common imperial rebar sizes are #3 (nominal diameter is 3/8 inches), #4 (nominal diameter is 1/2 inches), #5 (nominal diameter is 5/8 inches), #6 (nominal diameter is 3/4 inches), #7 (nominal diameter is 7/8 inches), #8 (nominal diameter is 1 inch), #9, #10, #11, #14 and #18.

#3 rebar uses: this thin and cost-effective mild steel rebar material adds strength to concrete roads, driveways, or patios. It’s also common in poured concrete swimming pools to provide the pool walls with shape and strength.

#4 rebar uses: it is slightly thicker, #4 rebar is perfect for adding strength to highways and can give columns and slabs added strength.#5 rebar is commonly used for bridges and highways. #6 rebar used for foundations, retaining walls, and roads or highways. #7 rebar uses: this rebar size can provide support for structures like multi-story parking garages and bridges.

Grade of rebar define by yield and tensile strength. Yield strength and tensile strength as the minimum and maximum stress ranges for a particular rebar grade. Yield strength is the minimum amount of stress a material can take before it begins to deform permanently. And tensile strength measures the maximum amount of stress a material can take before being permanently damaged and broken.

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Rebar grades are set by ASTM. The grade designation is equal to minimal yield strength in kilo pounds per square inch (KSI). Common grades are 40, 60, 75, 80, and 100. The nomenclature for the grades represents how much yield the rebar has. For example, grade 40 rebar has a minimum yield strength of 40 KSI, which is equal to 40,000 PSI, whereas grade 80 rebar has a minimum yield strength of 80 KSI or 80,000 PSI.

In united states, rebar or reinforcement bars is most commonly manufactured in grades 40, 60, and 75, it must confirm to ASTM A 615 with higher strength readily available in grades 80, 100, 120 and 150. Historical grades include 30, 33, 35, 36, 50 and 55 which are not in common use today.

**Grade 40 rebar**

Imperial rebar or reinforcing bar which has a minimum yield strength of 40 KSI, which is equal to 40,000 PSI, or 280 MPa is known as Grade 40 rebar.

Rebar with a grade 40 designation has a minimum yield strength of 40,000 pounds per square inch and must conforms to ASTM A-615 performance standards. Its metric is grade 280 rebar, with an equivalent minimum yield strength of 280 MPa. This makes grade 40 rebar an excellent choice for light- to medium-duty concrete reinforcing applications.

**Grade 40 rebar diameter**

Grade 40 rebar is a type of reinforcing steel bar that has a rib texture that improves concrete bonding. It helps concrete to minimize force tensions that can cause structural cracks and damage.

Grade 40 rebar diameter is about 10mm, 12mm, 16mm, 20mm, and 25mm (3/8 inches to 1 inch thick) which comes in length of 6m, 7.5m, 9m, 10.5m and 12m long.

**Grade 40 rebar sizes**

Grade 40 rebar sizes are – #3 – 3/8″ x 20′, #4 – 1/2″ × 20′, #5 – 5/8″ × 20′, #6 – 3/4″ × 20′, #7 – 7/8″ × 20′, and #8 – 1″ × 20′. Grade 40 rebar sizes comes in 10mm, 12mm, 16mm, 20mm and 25mm.

**Grade 40 rebar weight**

Grade 40 rebar #3 (3/8″ or 10mm) rebar weighs about 0.376 pound per foot and 7.52 pound for 20 feet, #4 (1/2″ or 12mm) rebar weighs about 0.668 pound per foot and 13.36 pound for 20 feet, #5 (5/8″ or 16mm) rebar weighs about 1.043 pound per foot and 20.86 pound for 20 feet, #6 (3/4″ or 20mm) rebar weighs about 1.502 pound per foot and 30.04 pound for 20 feet, #7 (7/8″ or 22mm) rebar weighs about 2.044 pound per foot and 40.88 pound for 20 feet, and #8 (1″ or 25mm) rebar weighs about 2.670 pound per foot and 53.40 pound for 20 feet.

**Grade 40 rebar yield and tensile strength**

Rebar is graded to show the amount of tensile strength it has in terms of pounds per square inch. Grade 40 rebar has a minimum yield strength of 40,000 PSI, which is equivalent to 280 MPa or 40 KSI. Grade 40 rebar has a minimum tensile strength of 60,000 PSI, which is equivalent to 415 MPa or **60 KSI.**

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**Grade 40 rebar markings**

Grade 40 rebar markings: first letter or symbol means producing mill and deformation pattern. The second marking means the bar size. The third letter represents the type of steel as follow: S: Carbon-steel (A615), W: Low-alloy steel (A706), R: Rail-steel (A996), I: Axle-steel (A996), A: Rail-steel (A996). The last marking shows the grade of reinforcing bar.40: grade 40, 60: grade 60, 75: grade 75.

Grade 40 rebar color code is yellow.

**Conclusion:**

Grade 40 rebar has a diameter range between #3 to #8 (3/8″ to 1″) of 20′ long, which has a minimum yield strength of 40,000 PSI (280 MPa or 40 KSI) and has a minimum tensile strength of 60,000 PSI (415 MPa or 60 KSI).