Materials
MP35N (Nickel-Cobalt-Chromium-Molybdenum Alloy)
MP35N
Manufacturing Considerations:
Composition: ~35% nickel, 35% cobalt, 20% chromium, 10% molybdenum.
Work-hardening alloy — extremely tough to machine, requiring specialized tooling and slower machining feeds/speeds.
Can be cold worked and aged to achieve very high strength (up to 260 ksi tensile).
Non-magnetic, retains strength and toughness across a wide temperature range.
Performance in Fasteners & Components:
Ultra-high strength: among the highest strength levels achievable for fastener alloys.
Corrosion resistance: exceptional in chloride, hydrogen sulfide, and seawater environments. Far superior to standard stainless steels.
Stress corrosion cracking (SCC) resistance: excellent, even in sour service and hydrogen-rich conditions.
Temperature stability: maintains mechanical properties from cryogenic to ~750°F (400°C).
Non-magnetic — useful for sensitive defense, medical, and electronic applications.
Applications in Engineered Fasteners:
Critical bolting for oil & gas subsea equipment, wellheads, and sour service environments.
Aerospace and defense fasteners requiring both strength and corrosion resistance.
Medical device components where biocompatibility and non-magnetic properties matter.
Springs, couplings, fasteners, and specialty hardware exposed to extreme environments.
Key Takeaway:
MP35N® is a superalloy for engineered fasteners, combining ultra-high strength, corrosion resistance, and reliability.
It is much harder to manufacture than steels or aluminums, but it’s chosen where failure is not an option— subsea oil & gas, aerospace, and medical are its primary fastener markets.
Materials
BRASS
BRONZE
COPPER
PH STAINLESS STEEL
DOING WHATEVER IT TAKES
Putting Manufacturing Exellence Into Practice
The manufacturing processes, testing capabilities, and quality systems featured throughout WN Global support the production of critical components and engineered fastening solutions across demanding industries. Connect with our team to learn how our manufacturing capabilities can support your project requirements.
