Jun 17 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
The primary function of alloy steels is to increase hardenability in order to optimize mechanical properties and toughness after heat treatment. The alloy additions also reduce environmental degradation under certain specified service conditions.
AISI 4815H alloy steels are low carbon nickel-molybdenum steels. The following datasheet will provide an overview of AISI 4815H alloy steel.
Chemical Composition
The chemical composition AISI 4815H alloy steels is outlined in the following table.
|
Element |
Content (%) |
|
Iron, Fe |
94.645 - 96.03 |
|
Nickel, Ni |
3.2 - 3.8 |
|
Manganese, Mn |
0.30 - 0.70 |
|
Molybdenum, Mo |
0.20 - 0.30 |
|
Silicon, Si |
0.15 - 0.30 |
|
Carbon, C |
0.12 - 0.18 |
|
Sulfur, S |
≤0.040 |
|
Phosphorous, P |
≤0.035 |
Physical Properties
The following table shows the physical properties of AISI 4815H alloy steels.
|
Properties |
Metric |
Imperial |
|
Density |
7.85 g/cm3 |
0.284 lb/in3 |
Mechanical Properties
The mechanical properties of AISI 4815H alloy steels are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1025 MPa |
148700 psi |
|
Yield strength |
855 MPa |
124000 psi |
|
Modulus of elasticity |
205 GPa |
29700 ksi |
|
Bulk modulus |
140 GPa |
20300 ksi |
|
Shear modulus |
80 GPa |
11600 ksi |
|
Poisson’s ratio |
0.29 |
0.29 |
|
Elongation at break |
15% |
15% |
|
Hardness, Brinell |
311 |
311 |
|
Hardness, Vickers |
329 |
329 |
|
Hardness, Knoop |
338 |
338 |
|
Hardness, Rockwell C |
34 |
34 |
|
Hardness, Rockwell B |
99 |
99 |
Thermal Properties
The thermal properties of AISI 4815H alloy steels are given in the following table
|
Properties |
Metric |
Imperial |
|
Thermal conductivity |
44.5 W/mK |
309 BTU.in/hrft².°F |
Other Designations
Other designations that are equivalent to AISI 4815H alloy steels include the following: