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Grade Selection Guide
The Properties Tables below provide technical data for many of the existing Grades of Ferro-Tic®. Some may have superior thermal shock resistance. Some are magnetic, some are nonmagnetic. Some operate under cryogenic conditions. Some offer excellent resistance to vibration. The Grades listed are those generally used for these particular purposes. However, they can and have been modified to meet specific operating requirements.
| Properties of Ferro-Tic Alloys. | |||||
|---|---|---|---|---|---|
| Grade | Carbide (Vol.%) |
Matrix Alloy Type | Ann. Hard. |
Max. Working Temp.(°F) |
Density (g/cc) |
| C | 45 | Medium Alloy Tool Steel |
44 70 | 375 | 6.60 |
| CM | 45 | High Chrome Tool Steel |
48 69 | 975 | 6.45 |
| CM-25 | 25 | High Chrome Tool Steel |
32 66 | 1000 | 7.00 |
| CHW-45 | 45 | Hot Work Tool Steel |
45 64 | 1000 | 6.45 |
| CHW-25 | 25 | Hot Work Tool Steel |
30 61 | 1000 | 7.00 |
| SK | 35 | Impact Resistant Tool Steel |
38 62 | 1000 | 6.80 |
| CS-40 | 45 | Martensitic Stainless |
50 68 | 700 | 6.45 |
| PK | 42 | Maraging Steel |
50 61 | 840 | 6.60 |
| MS-5A | 41 | Age Hardenable Martensitic SS |
48 61 | 840 | 6.55 |
| HT-6A | 40 | Age Hardenable Nickel Base |
46 52 | 1800 | 6.80 |
| Properties of Ferro-Tic Alloys. | ||||||
|---|---|---|---|---|---|---|
| Grade | Grade Coefficient of Thermal Expansion |
Trans.
Rupt. Strength |
Compressive Strength |
Impact Strength |
Thermal Shock |
Linear Size Change thru Heat Treat % |
| C | 70-375F 1.96 | 216 | 520 | 323 | 5 | +0.048 |
| CM | 70-975F 3.08 | 185 | 482 | 211 | 2 | -0.011 |
| SK | 70-1000F 5.89 | 225 | 381 | 422 | 100 | +0.034 |
| CS-40 | 70-700F 2.45 | 149 | 453 | 148 | 1 | +0.016 |
| PK | 70-840F 2.11 | 200 | 417 | 421 | 84 | -0.029 |
| MS-5A | 70-840F 1.97 | 256 | 415 | 343 | 9 | -0.009 |
| HT-6A | 70-1800F 4.93 | 191 | 285 | 306 | 11 | -0.014 |
| Grade | Comments |
| C | Excellent vibration dampening in the annealed condition, excellent cryogenic properties. Replaces A-2 tool steel. Highly Magnetic. |
| CM | For warm metalworking, drawing and forming. Replaces D-2 tool steel. Magnetic. |
| SK | Excellent impact strength. Increased wear resistance over CM-25 and CHW-25. Replaces S-7 tool steel. Magnetic. |
| CS-40 | High hardness with corrosion resistance of 400 series stainless steels. Magnetic. |
| PK | Combination of excellent transverse rupture strength, impact strength, and corrosion resistance. Good thermal shock resistance. Magnetic. |
| MS-5A | Excellent corrosion resistance. Excellent size stability at elevated temperatures. Replaces 27-4 PH Stainless. Slightly magnetic. An FDA approved material. |
| HT-6A | Excellent oxidation and corrosion resistance at high temperatures. Replaces StelliteTM/InconelTM. Non-magnetic. |