Why 8mm & 10mm TMT Bars Cost More Than 12mm | RK Steel
Why Are 8mm and 10mm TMT Bars More Expensive?
When buying TMT steel in Noida, Greater Noida, Ghaziabad or Delhi NCR, buyers often notice that 8mm and 10mm TMT bars cost more per kilogram than 12mm, 16mm, 20mm and other larger sizes. In the secondary steel market, 12mm is also commonly quoted as the basic rate.
These price differences are influenced by rolling mill productivity, production costs, size-wise demand and manufacturers' pricing policies.
1. Higher Rolling and Manufacturing Costs
TMT bars are manufactured by heating steel billets and passing them through rolling stands to achieve the required diameter. Smaller-diameter bars generally require greater reduction and additional processing.
- More rolling and processing requirements
- Potentially lower production tonnage per hour
- Additional equipment wear and maintenance
- More individual bars to count, bundle and handle per tonne
Depending on the mill configuration, these factors can make 8mm and 10mm bars more expensive to produce per tonne.
2. Why Is 12mm the Basic Rate in Secondary TMT Steel?
Many secondary TMT manufacturers and traders use 12mm as the benchmark diameter for their price quotations. Other sizes are then quoted with size extras or discounts.
This is a commercial pricing convention, not an industry-wide rule that every other diameter must cost more.
Example of Size-Wise TMT Pricing
| TMT Diameter | Illustrative Price Basis |
|---|---|
| 8mm | Basic + ₹2,000/MT |
| 10mm | Basic + ₹1,000/MT |
| 12mm | Basic Rate |
| 16mm | Basic + ₹500/MT |
| 20mm | Basic + ₹500/MT |
| 25mm | Basic + ₹1,000/MT |
| 32mm | Basic + ₹1,500/MT |
Note: These are hypothetical figures for explanation only, not current market quotations. Actual size extras differ between mills and dates.
3. Why Can Larger TMT Sizes Also Cost More Than 12mm?
Although larger diameters may offer higher rolling productivity, their selling prices depend on more than manufacturing cost.
- Production schedules: Some mills produce certain diameters less frequently.
- Limited inventory: Less readily available sizes may attract premiums.
- Market demand: Supply and demand affect size-wise quotations.
- Mill efficiency: Different rolling mills have different cost structures.
Therefore, 12mm can be the basic commercial rate while 16mm, 20mm, 25mm or 32mm carry additional charges.
4. Primary vs Secondary TMT Steel Pricing
Primary brands such as Tata Tiscon, JSW Neosteel and SAIL SEQR may publish diameter-wise prices or apply size extras. Secondary steel manufacturers commonly quote a 12mm reference rate, although practices vary.
The pricing structure alone does not determine steel quality. Buyers should check the specified grade, BIS compliance, test certificates and supply terms.
5. TMT Bar Weight Chart (12 Metre Length)
| Diameter | Approx. Weight Per Piece |
|---|---|
| 8mm | 4.74 kg |
| 10mm | 7.41 kg |
| 12mm | 10.67 kg |
| 16mm | 18.96 kg |
| 20mm | 29.63 kg |
| 25mm | 46.30 kg |
| 32mm | 75.85 kg |
Weights are theoretical nominal values; actual weights may vary within applicable tolerances.
When comparing TMT prices, always distinguish between the per-piece rate and the per-kilogram rate.
6. Does Higher Price Mean Better Quality?
No. A higher per-kilogram price for 8mm TMT does not automatically mean it is stronger or better than 16mm TMT. Quality depends on steel grade, mechanical properties, chemical composition, ductility and compliance with applicable standards.
Always select the diameter and grade specified by the structural engineer.
Frequently Asked Questions
Why is 8mm TMT costlier than 12mm?
Smaller diameters can involve greater rolling and handling requirements and lower production tonnage, contributing to a higher manufacturing cost per tonne.
Why is 12mm the base rate in secondary TMT?
It is a commonly used commercial benchmark for quoting diameter-wise rates. Other sizes may carry premiums or discounts.
Is 10mm always more expensive than 16mm?
No. It depends on the manufacturer, production economics, inventory and current price list.
Why is 32mm sometimes more expensive than 12mm?
Limited production batches, availability and market demand can create a premium for larger sizes.
Where can I get current TMT prices in Noida?
Contact RK Steel Company for current quotations for Tata Tiscon, JSW Neosteel, SAIL SEQR and other available TMT steel products.
Conclusion
8mm and 10mm TMT bars often carry higher per-kg prices because of rolling and processing economics. Meanwhile, 12mm is frequently used as a basic commercial rate in the secondary steel market. Other diameters can carry size extras depending on production, stock and demand.
For current prices and product availability, visit RK Steel Company.
RK Steel Company
Office: G-38, Sector 9, Noida - 201301
Phone: 9953364645 / 9999307984
Website: www.rksteelcompany.in