Steel Round Bar Sizes: Standard Dimensions, Applications & Specifications

Steel round bars are vital components in many engineering, construction, and industrial applications due to their strength, machinability, and wide range of sizes. Whether you’re fabricating machine parts or reinforcing concrete, understanding standard steel round bar sizes is crucial for optimal material selection and performance.

📏 Standard Steel Round Bar Sizes

Steel round bars are available in a wide variety of diameters and lengths. The diameter typically ranges from 6 mm to 300 mm, and the lengths are commonly available in:

• 3 meters

• 6 meters

• 12 meters

• Custom cut lengths as per project requirements

Common Diameter Range in Metric (mm):

Note: Tolerances can vary depending on the manufacturing method (cold drawn, hot rolled, forged).

🔧 Types of Steel Round Bars

Steel round bars can be classified based on their chemical composition and processing methods:

1. Carbon Steel Round Bars

• Grades: A36, C45, EN8, S275JR

• Applications: Shafts, general fabrication, base plates

2. Alloy Steel Round Bars

• Grades: EN19, 4140, 4340

• Applications: Gears, axles, heavy-duty components

3. Stainless Steel Round Bars

• Grades: 304, 316, 310

• Applications: Marine hardware, medical tools, food processing

4. Tool Steel Round Bars

• Grades: D2, H13, M2

• Applications: Dies, molds, punches

🛠️ Manufacturing Methods

Steel round bars are produced using the following techniques:

• Hot Rolled Round Bars – Good for structural use and general applications

• Cold Drawn Round Bars – Excellent surface finish and tight tolerances

• Forged Round Bars – Used in heavy engineering for superior strength

• Bright Bars – Ideal for precision machining

🧰 Applications of Steel Round Bars

Steel round bars are widely used in:

• Automotive & Aerospace: Shafts, fasteners, suspension components

• Construction: Reinforcements, base plates, anchors

• Manufacturing: Tools, machine components, fasteners

• Oil & Gas: Drill shafts, valves, flanges

🧮 Weight Calculation Formula

To estimate the weight of a steel round bar:

Weight (kg/m) = (π/4) × D² × ρ

Where:

• D = diameter in mm

• ρ (rho) = density of steel (approx. 0.00785 g/mm³)

Example:

For a 50 mm round bar:
Weight/m = (3.1416/4) × 50² × 0.00785 ≈ 15.4 kg/m

🔗 Related Products You May Need

• ✅ Bright Steel Round Bars

• ✅ EN8 Round Bars

📦 Packaging & Supply

We supply steel round bars in:

• Loose bundles

• Coil form (for smaller diameters)

• With or without end protection

• Custom lengths & cut-to-size

Available for immediate dispatch across Mumbai, Pune, Hyderabad, Chennai, and PAN India.

✅ Benefits of Choosing Standard Round Bar Sizes

• ✔️ Reduced wastage in machining

• ✔️ Easier inventory planning

• ✔️ Standardized designs for repeat production

• ✔️ Cost-effective for bulk procurement

📈 Popular Grades and Sizes in Stock

🛒 Looking for Specific Steel Round Bar Sizes?

We offer customization and on-time delivery tailored to your exact requirements.

📞 Get a Quote Today!

• ✅ Download Datasheet

• ✅ Contact Us for Sizes & Pricing

📍 Office Address: Plot No. 15, Khan compound, Taloja M.I.D.C. Navi-Mumbai 410208, Maharashtra INDIA
📞 Phone: +91 7385863226
📧 Email:info@amengineeringworks.in