Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther Designations
Introduction
Alloy steels comprise different varieties of steels which exceed the composition limits of Mn, C, Mo, Si, Ni, Va, and B set for carbon steels. They are designated by AISI four-digit numbers. The first two digits represent the main alloying elements, and the last two digits represent the carbon content present in the alloy in hundredth of a percent. They respond more quickly to mechanical and heat treatments than the carbon steels.
The datasheet given below provides more details about AISI 5046 alloy steel.
Chemical Composition
The chemical composition of AISI 5046 alloy steel is outlined in the following table.
| Element |
Content (%) |
| Iron, Fe |
97.775 - 98.47 |
| Manganese, Mn |
0.750 - 1.00 |
| Carbon, C |
0.430 - 0.500 |
| Chromium, Cr |
0.200 - 0.350 |
| Silicon, Si |
0.150 - 0.300 |
| Sulfur, S |
≤ 0.0400 |
| Phosphorous, P |
≤ 0.0350 |
Physical Properties
The physical properties of AISI 5046 alloy steel are tabulated below.
| Properties |
Metric |
Imperial |
| Density |
7.85 g/cm3 |
0.284 lb/in³ |
Mechanical Properties
The following table shows the mechanical properties of AISI 5046 alloy steel.
| Properties |
Metric |
Imperial |
| Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Hardness, Brinell (annealed and cold drawn) |
174 - 223 |
174 - 223 |
| Hardness, Knoop (converted from Brinell hardness) |
221 |
221 |
| Hardness, Rockwell B (converted from Brinell hardness) |
92 |
92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) |
13 |
13 |
| Hardness, Vickers (converted from Brinell hardness) |
208 |
208 |
| Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) |
60 |
60 |
Thermal Properties
The thermal properties of AISI 5046 alloy steel are given in the following table.
| Properties |
Metric |
Imperial |
| Thermal conductivity (typical steel) |
46.6 W/mK |
323 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to AISI 5046 alloy steel include:
- ASTM A519
- SAE J404
- SAE J412
- SAE J770