Introduction
Stainless steels are high alloy steels that have excellent corrosion resistance when compared to other steels since they have large chromium quantities. Stainless steels comprise 4 to 30% chromium, however most of them contain 10%. Three basic groups of stainless steels on the basis of their crystalline structure are:
Austenitic
Ferritic
Martensitic
Precipitation hardened steels, a group of stainless steels are a combination of martensitic and austenitic steels.
Maraging 300
Maraging 300 is also called Vascomax 300 is an 18% Nickel, Cobalt strengthened steel. Maraging steel is a high strength materials with a UTS of 1930 MPA after heat treatment. Maraging steel is obtained by Vacuum Induction Melting (VIM) followed by Vacuum Arc Remelting. The specific gravity of Maraging 300 is 8.0 g/cm3
Specifications
Maraging 300 from Dynamic Metals is available in the following specifications:
AMS 6514
ASTM A538
Mil-S-46850D
UNS K93120
W.Nr 1.6358
Chemical Composition (Wt %)
The chemical composition of Maraging 300 in wt% is given in the table below:
| C | Si | Mn | P | S | Al | Co | Ni | Mo | Ti | Cr | Cu | Fe | |
| Min | - | - | - | - | - | 0.1 | 9 | 18 | 5 | 1 | - | - | Bal |
| Max | 0 | 0 | 0 | 0 | 0 | 0.2 | 10 | 19 | 5 | 1 | 1 | 1 | - |
Mechanical Properties
The mechanical properties of Maraging 300 is provided in the table below:
| 0.2% proof Stress (MPA) | Tensile Strength (MPA) | Elongation (%) | Hardness (HRC) |
| Min: 1862 | Min:1930 | Min:5 | Min:52 |
Applications
The applications of Maraging 300 from Dynamic Metals are provided in the table below:
Driveshafts
Gears
Fasteners
Landing and Takeoff gear
Missile and ejector systems
Torsion springs
Source - Dynamic Metals
(www.steelguru.com)
