Aug 9 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
In comparison with carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments. Alloy steels can be used in specific melting and deoxidization processes for particular applications.
The following datasheet provides an overview of maraging 250 alloy steel.
Chemical Composition
The chemical composition of maraging 250 alloy steel is outlined in the following table.
|
Element |
Content (%) |
|
Iron, Fe |
68 |
|
Nickel, Ni |
18.5 |
|
Cobalt, Co |
7.5 |
|
Molybdenum, Mo |
4.8 |
|
Titanium, Ti |
0.4 |
|
Aluminum, Al |
0.1 |
|
Silicon, Si |
≤ 0.10 |
|
Manganese, Mn |
≤ 0.10 |
|
Carbon, C |
≤ 0.030 |
|
Phosphorous, P |
≤ 0.010 |
|
Sulfur, S |
≤ 0.010 |
|
Zirconium, Zr |
0.01 |
|
Boron, B |
0.003 |
Physical Properties
The following table shows the physical properties of maraging 250 alloy steel.
|
Properties |
Metric |
Imperial |
|
Density |
8.00 g/cc |
0.289 lb/in³ |
Mechanical Properties
The mechanical properties of annealed maraging 250 alloy steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
965 MPa |
140000 psi |
|
Yield strength (@strain 0.200 %) |
655 MPa |
95000 psi |
|
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
|
Shear modulus (estimated from elastic modulus) |
73.0 GPa |
10600 ksi |
|
Elastic modulus |
190 GPa |
27600 ksi |
|
Poisson's ratio (calculated) |
0.3 |
0.3 |
|
Elongation at break (in gage length of 4.5 times the square root of area) |
17.00% |
17.00% |
|
Reduction of area |
75.00% |
75.00% |
|
Hardness, Brinell (converted from Rockwell C hardness) |
290 |
290 |
|
Hardness, Knoop (converted from Rockwell C hardness) |
311 |
311 |
|
Hardness, Rockwell C |
30 |
30 |
|
Hardness, Vickers (converted from Rockwell hardness) |
301 |
301 |
Thermal Properties
The thermal properties of maraging 250 alloy steel are given in the following table.
|
Properties |
Metric |
Imperial |
|
Thermal conductivity (20°C) |
25.3 W/mK |
176 BTU in/hr.ft².°F |
Other Designations
Equivalent material to maraging 250 alloy steel include DIN 1.6358
Applications
The applications of maraging 250 alloy steel are given in the following table.