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Topics covered
introduction
Chemical composition
Physical properties
Mechanical properties
Thermal properties
Other designations
introduction
Alloy steels contain a wide range of steels including compositions which exceed the limits of Si, Va, Cr, Ni, Mo, Mn, B and C assigned to carbon steels. Compared to carbon steels, alloy steels are much more sensitive to mechanical and heat treatments.
Alloy steels include elements such as chromium, cobalt, nickel. These steels can be used in specific melting and deoxidation processes for particular types of applications.
The following datasheet gives an overview of AISI 4817 alloy steel.
Chemical composition
The chemical composition of AISI 4817 alloy steel is shown in the following table.
| Element | Content (%) |
|---|---|
| Iron, Fe | 94.775-95.85 |
| Nickel, Ni | 3.25-3.75 |
| silicon, silicon | 0.150-0.300 |
| Carbon, C | 0.150-0.200 |
| Manganese, manganese | 0.400-0.600 |
| Molybdenum, Mo | 0.200-0.300 |
| Sulfur, S | 0.0400 |
| Phosphorus, P | 0.0350 |
Physical properties
The following table shows the physical properties of AISI 4817 alloy steel.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g / cm3 | 0.284 lb / in³ |
Mechanical properties
The mechanical properties of AISI 4817 alloy steel are presented in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Compressive yield strength (average 1585 MPa, gears with housing depth 1.1 to 1.5 mm, housing hardness 60 HRC min.) | 1795 MPa | 260,300 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80.0 GPa | 11600 ksi |
| Elasticity module | 190-210 Gpa | 27557-30458 ksi |
| Poisson coefficient | 0.27-0.30 | 0.27-0.30 |
| Brinell hardness (hot rolled and cold drawn) | 187-229 | 187-229 |
| Hardness, Knoop (converted from Brinell hardness) | 230 | 230 |
| Hardness, Rockwell B (converted from Brinell hardness) | 94 | 94 |
| Hardness, Rockwell C (converted from Brinell hardness, value less than normal HRC range, for comparison purposes only) | 15 | 15 |
| Vickers hardness (converted from Brinell hardness) | 218 | 218 |
| Machinability (hot rolled and cold drawn. Based on machinability of 100 for AISI 1212 steel) | 60 | 60 |
Thermal properties
The thermal properties of AISI 4817 alloy steel are shown in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal conductivity (typical steel) | 44.5 W / mK | 309 BTU in / hr.ft². ° F |
Other designations
Materials equivalent to AISI 4817 alloy steel are:
| ASTM A29 | ASTM A322 | ASTM A331 | ASTM A519 | ASTM A752 |
| SAE J1397 | SAE J404 | SAE J412 | ASTM A304 | SAE J770 |
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