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| CHEMICAL COMPOSITION | |||||||
| Constituent | Maximum Percentage | ||||||
| SAIL TMT415 | Fe 415 | SAIL TMT 500 |
Fe 500 | SAIL TMT 550 | Fe 550 | SAIL-TMT HCR(Fe415/ 500/ 550) | |
| Carbon | 0.25 | 0.30 | 0.25 | 0.30 | 0.25 | 0.30 | 0.20 |
| Sulphur | 0.05 | 0.06 | 0.05 | 0.055 | 0.05 | 0.055 | 0.045 |
| Phosphorus | 0.05 | 0.06 | 0.05 | 0.055 | 0.05 | 0.050 | 0.045 |
| Sulphur & Phosphours | 0.10 | 0.11 | 0.10 | 0.105 | 0.10 | 0.10 | 0.09 |
| Corrosion Resistant Elements |
- | - | - | - | - | - | 0.75min |
| Carbon Equivalent | - | - | - | - | - | - | 0.53max |
| MECHANICAL PROPERTIES | ||||||
| Property | Grade | |||||
| . | Fe415 | SAIL TMT 415 | Fe500 | SAIL TMT 500 | Fe550 | SAIL TMT 550 |
| 0.2 per cent proof stress/ yield stress, Min N/mm.sq. |
415 | 415 | 500 | 500 | 550 | 550 |
| Elongation per cent,Min,on gauge length 5.65 sqrt( A) where A is the cross sectional area of the test piece | 14.5 | 22(upto 28mm dia) 20(Above 28 mm dia) | 12 | 20(upto 28mm dia) 18 (Above 26 mm dia) | 8 | 18(upto 25mm dia) 16 (Above28mm dia) |
| Tensile Strength,Min |
10% more than the actual0.2% proofstress but not less than 485N/mm .sq |
10% more than the actual0.2% proofstress but not less than 500N/mm.sq | 8% more than the actual0.2% proofstress but not less than 545N/mm.sq | 8% more than the actual0.2% proofstress but not less than 580 N/mm.sq | 6% more than the actual0.2% proofstress but not less than 585 N/mm.sq | 6 % more than the actual0.2% proofstress but not less than 630 N/mm .sq |
| (Upto 28 mm dia) &560N/mm.sq.(above28;mm.dia) | ( Upto 28 mm dia) & 560N/mm.sq. (above28mm.dia) | |||||
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