Mild steel bars (low-carbon steel bars) are a cornerstone of construction and manufacturing due to their strength, ductility, and cost-effectiveness. Whether for skyscrapers, machinery, or automotive frames, these bars provide the reinforcement needed for durability and safety.
As a leading supplier in Kolkata, K.R. Steel Udyog delivers premium mild steel bars that meet global standards. This guide covers:
✔ Correct grades of mild steel bars (updated as per client feedback)
✔ Key industrial and construction uses
✔ Expert tips for buying the best MS bars
1. What Are Mild Steel Bars?
Definition & Composition
Mild steel bars (MS bars) contain 0.05%–0.25% carbon, making them:
✅ Highly ductile – Easy to shape without cracking
✅ Weldable – Ideal for joints and fabrication
✅ Cost-efficient – More affordable than high-carbon steel
Key Properties
- Tensile strength: 250–600 MPa (varies by grade)
- Corrosion resistance: Requires coating (e.g., galvanizing) for outdoor use
2. Correct Grades of Mild Steel Bars
We specialize in the following internationally recognized grades:
| Grade | Standard | Tensile Strength | Key Uses |
| IS:2062 E250 | Indian Standard | 250 MPa | Fencing, light fabrication |
| SAE1018 | Automotive | 440 MPa | Gears, shafts, automotive parts |
| ASTM A36 | U.S. Standard | 400–550 MPa | Bridges, machinery, construction |
Why These Grades?
- IS:2062 E250: Budget-friendly for basic construction.
- SAE1018: Precision parts for automotive/industrial equipment.
- ASTM A36: High weldability for heavy-duty engineering.
3. Key Applications of Mild Steel Bars
A. Construction
✔ Reinforced Concrete (RCC): Beams, columns, slabs.
✔ Prefab Structures: Modular buildings, footings.
B. Automotive & Machinery
✔ SAE1018: Engine components, axles, gears.
✔ ASTM A36: Frames, brackets, industrial equipment.
C. Engineering & Infrastructure
✔ Bridges, flyovers: Load-bearing frameworks.
✔ Road barriers, signage: Coated for corrosion resistance.
4. How to Choose the Right Mild Steel Bars
1. Match the Grade to Your Project
- IS:2062 E250: Light fabrication, fencing.
- SAE1018/ASTM A36: Machinery, automotive, heavy construction.
2. Check Certifications
- ISI Mark (BIS) for Indian standards.
- Mill Test Certificate (MTC) for chemical/mechanical properties.
3. Inspect Physically
✔ Smooth, rust-free surface.
✔ Uniform thickness (no pitting or bends).
4. Compare Pricing
- Bulk discounts available (e.g., K.R. Steel Udyog offers competitive rates in Kolkata).
5. Why Choose K.R. Steel Udyog?
✅ Premium Quality: Rigorous testing for strength and durability.
✅ Wide Grade Range: IS:2062 E250, SAE1018, ASTM A36, and more.
✅ Pan-India Supply: Timely delivery across Kolkata and beyond.
✅ Competitive Pricing: Best-in-market MS rod rates.
6. Future Trends in Mild Steel Bars
- Green Manufacturing: Eco-friendly production processes.
- High-Strength Blends: For earthquake-resistant structures.
- Smart Bars: IoT-enabled stress monitoring.
Conclusion
Mild steel bars are indispensable for construction, automotive, and machinery—but quality hinges on choosing the right grade and supplier.
At K.R. Steel Udyog, we supply:
✔ Certified grades (IS:2062 E250, SAE1018, ASTM A36).
✔ Tailored solutions for engineering and industrial needs.
✔ Trusted by builders across India.
For the best mild steel bars in Kolkata, contact us today!
