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Model No: Cobalt MP35N
AMS 5758 / Cobalt MP35N Steel Bar
The AMS 5758 specification ensures that Cobalt MP35N meets stringent requirements for strength, corrosion resistance, and biocompatibility.
Delivery :
FOB
minimum order :
50 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
The AMS 5758 specification outlines the requirements for Cobalt MP35N, a high-strength, corrosion-resistant alloy supplied in bar form. This multiphase cobalt-based alloy is distinguished by its exceptional mechanical properties, biocompatibility, and resistance to harsh environments, making it a preferred material for demanding aerospace, medical, and industrial applications.
Composition and Key Characteristics
MP35N is primarily composed of cobalt, with significant additions of nickel, chromium, and molybdenum, contributing to its outstanding performance. Key characteristics include:
- Non-magnetic properties – Ideal for applications requiring magnetic transparency.
- Ultra-high tensile strength – Up to 300 ksi (2070 MPa) when properly work-strengthened.
- Excellent ductility and toughness – Ensures durability under stress.
- Biocompatibility – Suitable for medical implants and surgical instruments.
- High-temperature resistance – Maintains performance up to 750°F (400°C) in fully hardened conditions.
Chemical Composition of Cobalt MP35N
| Element | Min | Max |
| Carbon, C | — | 0.025 |
| Manganese, Mn | — | 0.15 |
| Silicon, Si | — | 0.15 |
| Phosphorus, P | — | 0.015 |
| Sulfur, S | — | 0.010 |
| Nickel, Ni | 33.00 | 37.00 |
| Chromium, Cr | 19.00 | 21.00 |
| Iron, Fe | — | 1.00 |
| Molybdenum, Mo | 9.00 | 10.50 |
| Titanium, Ti | — | 1.00 |
| Cobalt, Co | Balance* | |
Select AMS Number
| AMS Number | Alloy | Type | UNS | Cross Ref. Spec | Misc./Shape |
|---|---|---|---|---|---|
| AMS 5758 | MP35N | Cobalt | R30035 | - | Bar |
| AMS 5844 | MP35N | Cobalt | R30035 | - | Bar |
| AMS 5845 | MP35N | Cobalt | R30035 | - | Bar |
Select ASTM Number
| ASTM Specification | Alloy | Type | UNS | Cross Ref. Spec |
|---|---|---|---|---|
| ASTM F562-13 | MP35N | Cobalt | UNS R30035 | AMS 5844, AMS 5845, AMS 5758 |
| ASTM F688-14 | MP35N | Cobalt | UNS R30035 | AMS 5844, AMS 5845, AMS 5758 |
| ASTM F961-14 | MP35N | Cobalt | UNS R30035 | AMS 5844, AMS 5845, AMS 5758 |
Solution Treatment and Mechanical Properties (AMS 5758 Condition)
In the solution-treated state (per AMS5758), MP35N undergoes heat treatment at 1900–1925°F (1038–1052°C) for 4–8 hours, resulting in the following mechanical properties:
Tensile Strength: 115,000–145,000 psi
Yield Strength: 35,000–65,000 psi
Elongation: ≥50%
Reduction of Area: ≥65%
While the solution-treated condition provides good formability, additional cold working and age hardening are required to achieve the alloy’s maximum strength in fabricated components.
Applications of MP35N Alloy
Due to its corrosion resistance, high strength, and fatigue resistance, MP35N is widely used in:
- Aerospace: Fasteners, landing gear components, and high-stress structural parts.
- Medical: Implants, pacemaker leads, and surgical tools.
- Oil & Gas: Downhole equipment exposed to corrosive environments.
- Defense: High-performance military hardware.
The AMS 5758 specification ensures that Cobalt MP35N meets stringent requirements for strength, corrosion resistance, and biocompatibility. While the solution-treated condition offers excellent ductility, subsequent cold work and aging are essential to unlock the alloy’s full potential. With its unmatched combination of properties, MP35N remains a critical material for advanced engineering applications.
For high-performance applications requiring ultra-high strength and reliability, MP35N stands as a proven solution.
Looking for a reliable supplier of Cobalt MP35N alloy bars that meet AMS5758 specifications? Lork Group is a trusted provider of premium MP35N alloy, offering superior strength, corrosion resistance, and biocompatibility for aerospace, medical, and industrial applications.
Get a Quote Today!
For competitive pricing and high-quality Cobalt MP35N alloy, contact Lork Group now! Our team is ready to assist with your material needs, ensuring fast turnaround and exceptional service.
