MP35N® Alloy

Here at Best Stainless, we provide the MP35N® alloy in round bar. MP35N® is a nickel-cobalt base alloy of the Multiphase alloy systems that has a unique combination of properties ultra high strength, toughness, ductility and outstanding corrosion resistance.

MP35N® Alloy Characteristics

MP35N® alloy is renowned for its exceptional resistance to stress corrosion cracking and crevice corrosion, qualities that make it an ideal choice for fastener material in demanding environments. This alloy excels in resisting corrosion in environments containing chlorides, various inorganic acids, and is notably resistant to sulfidation, high-temperature oxidation, and hydrogen embrittlement. Such resilience makes it exceptionally suitable for harsh operational conditions found in marine, petrochemical, and medical applications.

Typically, MP35N® is cold worked to enhance its mechanical properties, followed by age hardening to fine-tune the balance between corrosion resistance and strength to meet specific application requirements. The age-hardening temperature is critical and varies based on the extent of cold working and the desired balance between corrosion resistance and mechanical strength. Incorrect aging temperatures can adversely affect the alloy's strength.

For expert guidance on achieving the optimal combination of cold working and age hardening for your specific application, please consult with Best Stainless. Our specialized value-added services are designed to alleviate the complexity of material selection and processing for our customers, ensuring peace of mind and successful outcomes.

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MP35N® Alloy Applications

• Aerospace and Aviation:
  • Fasteners and bolts used in aircraft and engines due to their high strength and corrosion resistance.
  • Springs and cables for critical aerospace components.
• Chemical Processing:
  • Equipment and components exposed to corrosive chemicals, including reactors and mixers.
  • Piping and valves for chemical transport systems.
• Electronics:
  • Connectors and springs in electronic devices for their conductivity and corrosion resistance.
• Oil and Gas Industry:
  • Components for drilling and exploration that require corrosion resistance to sour gas environments.
  • Valve parts, pump shafts, and fasteners used in harsh chemical and high-pressure environments.
• Marine Applications:
  • Marine hardware and components for boats and ships operating in saltwater environments.
  • Subsea connectors and instrumentation for deep-sea exploration.
• Medical Devices:
  • Orthopedic implants such as bone screws and plates due to its biocompatibility and strength.
  • Surgical instruments and dental tools for their durability and corrosion resistance.
• Motorsport and High-Performance Automotive:
  • Engine components, suspension systems, and fasteners for their strength-to-weight ratio and reliability under extreme conditions.

MP35N® Stock Shapes

• MP35N Pump Shafts
• MP35N Round Bar
• MP35N Square Bar
• MP35N Boat Shaft
• MP35N Flat Bar
• MP35N Hex Bar

MP35N® Composition

• Carbon 0.02
• Phosphorus 0.015
• Silicon 0.15
• Nickel 37.00
• Cobalt Balance
• Boron 0.010
• Manganese 0.15
• Sulfur 0.010
• Chromium 21.00
• Molybdenum 10.50
• Titanium 1.00
• Iron 1.00

MP35N® Industry Standards

• AMS 5844: Aerospace material specification for MP35N® in the work-strengthened and aged condition.
• AMS 5845: Aerospace material specification for MP35N® in the solution-treated and aged condition, highlighting its use in high-performance aerospace applications.
• ASTM F562: Specification for wrought cobalt-nickel-chromium-molybdenum alloys (including MP35N®) used in surgical implants, underscoring its biocompatibility and strength.
• ISO 15156-3 (NACE MR 0175): Provides requirements for materials used in sour oil and gas production environments, applicable to MP35N® for its resistance to sulfide stress cracking.
• ISO 5832-6: Specifies the characteristics of wrought cobalt-nickel-chromium-molybdenum alloy for surgical implants, relevant to MP35N® due to its material composition.
• GE-S400/S1000: General Electric's specifications for materials and components, which may include MP35N® in aerospace applications.
• SPS-M-663: A specification potentially relevant to MP35N® in specific aerospace material applications, depending on the material requirements.
• RR SABRe Edition 2: Rolls-Royce's supplier requirements, including material specifications potentially applicable to MP35N® components.
• UNS R30035: The Unified Numbering System designation for MP35N®, directly identifying this specific alloy.

MP35N® Benefits

• Exceptional Corrosion Resistance: Offers superior performance in harsh, corrosive environments, including resistance to pitting and crevice corrosion.
• High Strength: Provides one of the highest strength levels among metallic materials, even at elevated temperatures.
• Outstanding Toughness: Maintains excellent toughness and ductility over a wide range of temperatures, making it ideal for demanding applications.
• Biocompatibility: Suitable for medical implant devices due to its excellent biocompatibility and resistance to body fluids.
• Good Fatigue Resistance: Exhibits superior fatigue strength, crucial for cyclic loading applications such as springs and cables.
• Resistance to Stress Corrosion Cracking: Highly resistant to stress corrosion cracking, especially in environments containing chlorides or hydrogen sulfide.
• Magnetic Properties: Non-magnetic, which is essential for electronic and certain medical applications where magnetic interference must be minimized.
• Wear Resistance: Exhibits good wear resistance, beneficial in applications involving friction and material wear.