Physical Properties
| Material | Hot Forming Temperature | Thermal Conductivity W/(m.K) | Specific Heat Capacity J/Kg. K | Mean coefficient of Thermal Expansion * 10 exp(-6).K(-1) |
| 214N (349S52) | 1150-950 Deg C | 14.5 | 500 | 100 Deg.C 15.5 300 Deg.C 17.5 500 Deg.C 18.5 700 Deg.C 18.8 |
1.4882 |
1150-950 Deg C | 14.5 | 500 | 100 Deg C 15.5 300 Deg C 17.5 500 Deg C 18.5 700 Deg C 18.8 |
| EN24 - (817M40) | 37.7 | 460 | ||
EN52 - (401S45) |
1100- 900 Deg C | 21 | 500 | 100 Deg C 10.9 300 Deg C 11.2 500 Deg C 11.5 700 Deg C 11.8 |
EN59 - (443S45) |
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Nimonic (80A) |
1150-1050 | 13 | 460 | 100 Deg C 11.9 300 Deg C 13.1 500 Deg C 13.7 700 Deg C 14.5 |
Specific Heat
is the ratio of heat required to raise the temperature of a certain weight of material by 1 Deg C to that required to raise the temperature of the same weight of water by 1 Deg C
* Note - To find the expansion at 300 Deg C of a valve with a stem diameter of 0.275" in 214N material (Assuming the stem diameter was measured at 20 Deg. C) the temperature difference is (300 Deg C - 20 Deg C) = 280 Deg C stem diameter x temperature difference x coefficient of thermal expansion = Expansion of Valve ie:0.275 x 280 x 0.0000175 = 0.0013"
High Temperature Hardness (Stellite No.6 & No.12)
| Material's (Valve Steels & Tips) | Rockwell 'C' Scale | Vickerâs '30' |
| 214N - (349S52) | 30 HRc | 318 Vicker's |
1.4882 |
30 HRc | 385 Vicker's |
| EN52 (401S45) | 25 - 31 HRc | 437 - 395 Vicker's |
EN59 (443S65) |
28 - 36 HRc | 283 - 353.5 Vicker's |
EN24 (817M40) |
22 - 30 HRc | 248 - 302 Vicker's |
Nimonic (80A) |
32 HRc | Vicker's |
| Stellite 6 (Seats) |
38 - 42 HRc | 371 - 412.5 Vicker's |
| Stellite 12 (Tips) | 47 - 50 HRc | 485 - 541 Vicker's |
| EN24 (welded tips) | 52 - 54 HRc | 541 - 576 Vicker's |
| 1.3343 (welded tips) | Approx. 58 HRc | Vicker's |
| Material +/- 0.5 Grams | Volumetric Weight |
| 214N - (349S52) | 7.74 g/cc x (16.38706 x Volume) |
1.4882 |
7.81 g/cc x (16.38706 x Volume) |
| Nimonic (80A) | 8.19 g/cc x (16.38706 x Volume) |
EN59 (443S65) |
7.74 g/cc x (16.38706 x Volume) |
EN52 (401S45) |
7.61 g/cc x (16.38706 x Volume) |
EN24 (817M40) |
7.84 g/cc x (16.38706 x Volume) |