| 709M40 (En19) |
|---|
BLACK ROUND BAR
Chemical Composition |
| Carbon | 0.035 - 0.45 |
| Silicon | 0.10 - 0.35 |
| Manganese | 0.50 - 0.80 |
| Chromium | 0.90 - 1.20 |
| Molybdenum | 0.20 - 0.40 |
| Sulphur | 0.05 MAX |
| Phosphorus | 0.05 MAX |
| Size | Kg/m |
| 20 | 2,466 |
| 25 | 3,853 |
| 30 | 5,549 |
| 35 | 7,553 |
| 40 | 9,865 |
| 45 | 12,485 |
| 50 | 15,413 |
| 55 | 18,65 |
| 60 | 22,195 |
| 65 | 26,049 |
| 70 | 30,21 |
| 75 | 24,68 |
| 80 | 39,458 |
| 85 | 44,545 |
| 90 | 49,939 |
| 95 | 55,642 |
| 100 | 61,654 |
| 108 | 71,846 |
| 115 | 81,537 |
| 120 | 88,781 |
| 130 | 104,195 |
| 140 | 120,841 |
| 150 | 138,721 |
| 160 | 157,833 |
| 170 | 178,179 |
| 180 | 199,757 |
| 190 | 222,57 |
| 200 | 246,614 |
| 210 | 271,893 |
| 220 | 298,403 |
| 230 | 326,148 |
| 240 | 355,125 |
| 250 | 385,336 |
| 280 | 493,4 |
| 305 | 586,34 |
| 330 | 685,2 |
| 350 | 769,84 |
| MECHANICAL PROPERTIES | Condition |
|---|
| | R | S | T | U | V |
| Limited Ruling Sections : mm | 254 | 152 | 102 | 64 | 29 |
| Tensile Strength, Mpa | 690/850 | 770/930 | 850/1000 | 930/1080 | 1000/1160 |
| Yield Stress , Mpa Min. | 480 | 570 | 665 | 740 | 835 |
| Elongation, percent Min | 15 | 15 | 13 | 12 | 12 |
| Izod Impact Value, Joule | 34 | 54 | 54 | 47,5 | 47,5 |
| Brinell Hardness Number | 201/255 | 223/277 | 248/302 | 269/331 | 293/352 |
| BS 970 |
| SAE (AISI) |
| WERKSTOFF NO |
TYPICAL USES :
Axle shafts, crankshafts, connecting rods, gears, high tensile bolts and studs, propeller shaft joints, rifle barrels and breech mechanisms
for small arms parts, induction hardened trackpins.