PHYSICAL PROPERTIES AS PER IS-2507
| Annealed | Hardened & Tempered | |||||||||
| Sr.No. | Grade | Vickers Hardness HV, Max. |
Yield Stress N/mm2,Min. |
Tensile Strength N/mm2,Max. |
Elongation, Percent ,Min. |
Vickers Hardness HV Min-Max. | Yield tress N/mm2, Min. |
Tensile Strength N/mm2, Max. |
Elongation, Percent, Min., Guage Length 5.65 |
|
| 1 | 45C 8 | 185 | » | 270 | 590 | 30 | 350 to 425 | 1030 | 1180 to 1420 | 6 |
| 2 | 55C 6 | 195 | ||||||||
| 3 | 65C 6 | 205 | ||||||||
| 4 | 70C 6 | 215 | ||||||||
| 5 | 75C 6 | 220 | » |
290
|
640 | 25 | 350 to 475 | 1080 | 1180 to 1570 | 6 |
| 6 | 80C 6 | 220 | ||||||||
| 7 | 85C 6 | 220 | ||||||||
| 8 | 98C 6 | 225 | 310 | 690 | 25 | 475 to 540 | 1470 | 1570 to 1760 | 6 | |
| 9 | 55Si7 | 240 | 340 | 780 | 20 | 475 to 570 | 1470 | 1570 to 1960 | 6 | |
| 10 | 50Cr4 | 240 | 340 | 780 | 20 | 505 to 650 | 1570 | 1670 to 2260 | 5 | |
| 11 | 50Cr4V2 | 240 | 340 | 780 | 20 | 555 to 670 | 1760 | 1880 to 2360 | 4 | |
Note 1 – 1 N/mm² == 1MN/m ² == 0.1020 kgf/mm².
Note2 – The values for elongation for gauge length Lₒ == 50 mm and Lₒ == 12.5 mm should be reduced by about one-third the values specified for gauge length Lₒ ==5.65√Sₒ.
Note3 – The strength values for the strips in the hardened and tempered condition depend on the thickness. In view of the fact that the strength values are also influenced by the rolling stresses, the strength properties should be subject to mutual agreement between the purchaser and the supplier.
Note4 – Since slight surface decarburization is unavoidable, the hardness values specified may be considered approximate.
