Aug 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
Alloy steels are designated by AISI four-digit numbers. They comprise different kinds of steels having composition exceeding the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va set for carbon steels. They quickly respond to mechanical and heat treatments than the carbon steels.
The following datasheet gives an overview of maraging 350 alloy steel.
Chemical Composition
The following table shows the chemical composition of maraging 350 alloy steel.
|
Element |
Content (%) |
|
Iron, Fe |
63 |
|
Nickel, Ni |
Balance |
|
Cobalt, Co |
12 |
|
Molybdenum, Mo |
4.8 |
|
Titanium, Ti |
1.4 |
|
Aluminum, Al |
0.1 |
|
Manganese, Mn |
≤ 0.10 |
|
Silicon, Si |
≤ 0.10 |
|
Carbon, C |
≤ 0.030 |
|
Sulfur, S |
≤ 0.010 |
|
Phosphorous, P |
≤ 0.010 |
|
Zirconium, Zr |
0.01 |
|
Boron, B |
0.003 |
Physical Properties
The physical properties of maraging 350 alloy steel are listed in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.08 g/cc |
0.292 lb/in³ |
Mechanical Properties
The mechanical properties of annealed maraging 350 alloy steel are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1140 MPa |
165000 psi |
|
Yield strength (@ strain 0.200%) |
827 MPa |
120000 psi |
|
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
|
Shear modulus (estimated from elastic modulus) |
77 GPa |
11200 ksi |
|
Elastic modulus |
200 GPa |
29000 ksi |
|
Poisson's ratio |
0.3 |
0.3 |
|
Elongation at break (in gage length 4.5 times the square root of the area) |
18% |
18% |
|
Reduction of area |
70% |
70% |
Thermal Properties
The thermal properties of maraging 350 alloy steel are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@ 21-480°C/69.8-896°F) |
11.3 µm/m°C |
6.28 µin/in°F |
|
Thermal conductivity (@20°C) |
25.3 W/mK |
176 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to maraging 350 alloy steel include: