Maraging 350 (also known as Vascomax® 350, AMS 6515) is an 18% nickel, cobalt strengthened steel. It is a very high strength material reaching a UTS of 2310 MPA after heat treatment. It is produced by Vacuum Induction Melting (VIM) followed by Vacuum Arc Remelting (VAR).
It can also be readily machined and formed to your specifications. In addition, the aging process of Maraging steel raises the hardness to a level sufficient for many tooling applications.
Maraging steel is used in aircraft, with applications including landing gear, helicopter undercarriages, slat tracks and rocket motor cases - applications which require high strength-to-weight material. Maraging steel offers an unusual combination of high tensile strength and high fracture toughness.
| 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 |
after quenching and tempering mechanical property:
|
σb MPa |
|
δ5 % |
Ψ % |
AKv J |
KIC |
HRC |
|
|
≥2255 |
≥2155 |
≥7 |
≥38 |
≥7 |
Actual test |
≥50 |
We also can produce Maraging c300=ams 6514 steel and maraging c250 steel=asm 6512.Please find chemical analyse difference below
| Standard Organization | Designation/Grade | Country/Region of Origin | Notes/Remarks |
|---|---|---|---|
| UNS | S35000 | USA | Closest equivalent to AISI 300M |
| AISI/SAE | 350 | USA | High-performance maraging steel |
| ASTM | A203 | USA | Used for pressure vessels |
| EN | 1.6350 | Europe | Similar properties to C350 |
| JIS | SCMN 350 | Japan | Minor compositional differences |
Fabrication Properties
Weldability
| Welding Process | Recommended Filler Metal (AWS Classification) | Typical Shielding Gas/Flux | Notes |
|---|---|---|---|
| TIG | ERNiCrMo-3 | Argon | Preheat recommended |
| MIG | ERNiCrMo-3 | Argon/CO2 | Post-weld heat treatment advised |
Maraging 350 Steel is generally weldable using standard processes such as TIG and MIG. However, preheating is often recommended to prevent cracking, and post-weld heat treatment is essential to restore the desired mechanical properties.
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