What are TMT Rebars?
TMT (Thermo-Mechanically Treated) rebars are high-strength reinforcement bars that undergo a specialized metallurgical process to enhance their physical and mechanical properties. These rebars are widely used in construction projects due to their superior strength, ductility, and resistance to corrosion.
The manufacturing process of TMT rebars includes three main steps:
TMT rebars stand out due to their unique combination of strength, flexibility, and durability. Here are the key differences between TMT rebars and other types of rebars:
Common Grades of TMT Rebars in the USA
TMT rebars in the USA typically comply with ASTM standards for reinforcement bars, such as ASTM A615 and ASTM A706. The most common grades include:
- Grade 40: Yield strength of 40 ksi (275 MPa). Suitable for light-duty construction projects.
- Grade 60: Yield strength of 60 ksi (415 MPa). Ideal for commercial and industrial buildings.
- Grade 75: Yield strength of 75 ksi (520 MPa). Used in critical infrastructure projects.
- Grade 80: Yield strength of 80 ksi (550 MPa). Recommended for high-strength applications.
Structural Steel Grade Table – Rebars
Application | USA (ASTM Grade) | Europe (EN 10080 Grade) | India (IS 1786 Grade) | Chemical Composition | Mechanical Properties |
Mild Steel Rebars | ASTM A615 Grade 40 | B500A | Fe 415 | C: 0.30% max, Mn: 0.50-1.0%, Si: 0.15-0.30% | Yield: 415 MPa, Tensile: 485 MPa, Elongation: 20% |
Ductile Mild Steel Rebars | ASTM A706 Grade 40 | B500A | Fe 415D | C: 0.25% max, Mn: 0.50-1.0%, Si: 0.15-0.35% | Yield: 415 MPa, Tensile: 485 MPa, Elongation: 22% |
High-Strength Rebars | ASTM A615 Grade 60 | B500B | Fe 500 | C: 0.30% max, Mn: 0.75-1.5%, Si: 0.15-0.40% | Yield: 500 MPa, Tensile: 545 MPa, Elongation: 16% |
High-Strength Ductile Rebars | ASTM A706 Grade 60 | B500B | Fe 500D | C: 0.25% max, Mn: 0.70-1.50%, Si: 0.20-0.50% | Yield: 500 MPa, Tensile: 565 MPa, Elongation: 18% |
High-Strength and Seismic-Resistant Rebars | ASTM A615 Grade 75 | B500C | Fe 550 | C: 0.35% max, Mn: 1.0-1.6%, Si: 0.20-0.45% | Yield: 550 MPa, Tensile: 585 MPa, Elongation: 14% |
Ductile High-Strength Rebars | ASTM A706 Grade 75 | B500C | Fe 550D | C: 0.30% max, Mn: 1.0-1.6%, Si: 0.20-0.45% | Yield: 550 MPa, Tensile: 600 MPa, Elongation: 16% |
Extra High-Strength Rebars | ASTM A1035 | – | Fe 600 | C: 0.40% max, Mn: 1.20-1.80%, Si: 0.20-0.50% | Yield: 600 MPa, Tensile: 700 MPa, Elongation: 12% |
Dimensions of TMT Rebars
The size of TMT rebars is standardized and is denoted by numbers that correspond to the diameter of the bar in 1/8-inch increments. Below are the most common sizes:
| Rebar Size | Diameter (Inches) | Diameter (mm) | Weight per Foot (lbs) | Weight per Meter (kg) |
| #3 | 0.375 (3/8″) | 9.5 | 0.376 | 0.560 |
| #4 | 0.500 (1/2″) | 12.7 | 0.668 | 0.995 |
| #5 | 0.625 (5/8″) | 15.9 | 1.043 | 1.554 |
| #6 | 0.750 (3/4″) | 19.1 | 1.502 | 2.236 |
| #7 | 0.875 (7/8″) | 22.2 | 2.044 | 3.042 |
| #8 | 1.000 (1″) | 25.4 | 2.670 | 3.973 |
Epoxy-Coated TMT Rebars
For projects requiring enhanced corrosion resistance, we also offer TMT rebars with epoxy coatings. These rebars are:
- Ideal for Marine & Coastal Construction: Protection against saltwater environments.
- Perfect for Bridges & Foundations: Ensures durability in highly corrosive conditions.
Benefits of TMT Rebars
- High Strength and Durability: Ideal for heavy-load structures and long-term durability.
- Earthquake Resistance: Superior ductility ensures structures remain stable under seismic shocks.
- Corrosion Resistance: The controlled treatment prevents rust, even in coastal or humid areas.
- Fire Resistance: Can withstand high temperatures, providing additional safety in case of fires.
- Cost-Effective: Longer lifespan and minimal maintenance make TMT rebars a cost-efficient choice.
Custom Sizes and Specifications
We supply a wide range of TMT Rebars to meet diverse project requirements. If you need something specific, we accommodate custom dimensions and specifications—simply provide a detailed drawing, and we’ll deliver exactly what you need.
Applications of TMT Rebars
Why Choose Our TMT Rebars?
Our TMT rebars meet the highest standards of quality and performance. They are:
Manufactured using state-of-the-art technology.
Compliant with ASTM standards for consistency and reliability.
Available in various grades and dimensions to suit diverse construction needs.
Contact Us
Looking for high-quality TMT rebars for your next construction project? Reach out to us today for a quote and consultation!