MP35N UNS R30035 Alloy

Source：http://www.zytcsteel.com Time：2026/8/14 16:41:27 View：

ZYTC Alloy is a trusted Chinese supplier of premium MP35N® (UNS R30035) cobalt‑nickel‑chromium‑molybdenum alloy. This multi‑phase, non‑magnetic superalloy delivers an unmatched balance of ultra‑high tensile strength, good ductility, excellent toughness and superior corrosion resistance for the most demanding medical, oil & gas, marine and high‑performance industrial projects. Our MP35N material strictly follows VIM‑VAR double vacuum melting procedures and meets full AMS, ASTM, ISO and NACE specifications to guarantee consistent material cleanliness and reliable batch‑to‑batch performance.

Material Overview of MP35N UNS R30035

MP35N® is a non‑magnetic nickel‑cobalt‑chromium‑molybdenum alloy, famous for achieving tensile strength up to 300 ksi (2068 MPa) via work hardening, phase transformation and aging heat treatment. It offers outstanding resistance to hydrogen sulphide, saltwater and chloride‑rich solutions, as well as excellent resistance to crevice corrosion and stress‑corrosion cracking under seawater and aggressive sour‑gas operating environments, complying with NACE MR0175 requirements for sour‑well service. For fully work‑hardened MP35N components, the recommended maximum service temperature reaches 750 °F (399 °C).

To achieve premium material purity, MP35N is manufactured by vacuum induction melting (VIM), followed by vacuum arc remelting (VAR). This double‑vacuum melting route minimizes residual impurities and inclusions, critical for high‑fatigue‑life parts used in medical implants and down‑hole oil‑gas equipment.

MP35N UNS R30035 Alloy

Applicable Industry Specifications

ZYTC Alloy supplies MP35N products conforming to a complete set of international aerospace, medical and oil‑gas standards:

AMS 5758: VIM‑VAR MP35N bar, solution heat‑treated at 1900‑1925 °F for 4‑8 hours
AMS 5844: VIM‑VAR MP35N bar, solution heat‑treated and work‑strengthened
AMS 5845: VIM‑VAR MP35N bar, solution heat‑treated, work‑strengthened & aged at 1000‑1200 °F for 4 hours
ASTM F‑562, BS 7252‑6, ISO 5832‑6: Specifications for surgical implant grade MP35N alloy
NACE MR0175: Sour‑service qualification for oil and gas corrosive environments

Available Product Forms

ZYTC Alloy provides MP35N UNS R30035 in multiple wrought product forms: round bar, seamless tube, wire, sheet and plate. Standard sizes are kept in stock for fast lead‑time delivery. Custom dimensions, special heat‑treatment conditions and precision finishing are available against customer drawings. Every shipment is supplied with complete Mill Test Reports, and third‑party PMI or mechanical testing can be arranged upon request for full material traceability.

Key Performance Advantages

Non‑magnetic property, ideal for sensors, electronics and MRI‑compatible medical devices
Ultra‑high tensile strength up to 300 ksi (2068 MPa) after work hardening plus aging treatment
Good ductility and toughness even at ultra‑high‑strength levels
Excellent resistance to H₂S, seawater, chloride pitting, crevice and stress‑corrosion cracking
High fatigue performance for repeated‑load components such as springs and fasteners
VIM‑VAR double vacuum melting ensures low impurity content and high material cleanliness
Biocompatible, qualified for surgical implant and dental component manufacturing

Physical Data

Chemical Composition (Weight %)	MP35N (UNS R30035)
Nickel (Ni)	33.0 – 37.0
Cobalt (Co)	Balance
Chromium (Cr)	19.0 – 21.0
Molybdenum (Mo)	9.0 – 10.5
Iron (Fe)	1.0 max.
Titanium (Ti)	1.0 max.
Manganese (Mn)	0.15 max.
Silicon (Si)	0.15 max.
Carbon (C)	0.025 max.

Physical Properties	Metric	Imperial
Density	8.43 g/cm³	0.304 lb/in³
Modulus of Elasticity	230 GPa	33.4 × 10⁶ psi
Magnetic Permeability	< 1.01	< 1.01

Mechanical Properties (Aged – AMS 5845)	Metric	Imperial
Tensile Strength (min.)	1860 MPa	270 ksi
Yield Strength (0.2% offset, min.)	1620 MPa	235 ksi
Elongation (min.)	12%	12%
Hardness	38–48 HRC	38–48 HRC

Typical Application Fields

Thanks to its combined high‑strength, corrosion‑resistant and non‑magnetic features, MP35N UNS R30035 is widely used across multiple high‑end industries:

Oil & Gas: down‑hole pump drive shafts, down‑hole tools, valve stems, pump shafts, high‑strength fastener components for sour‑well environments
Marine & General Industry: high‑strength marine components, heavy‑duty springs, non‑magnetic electrical parts and sensing devices
Medical & Dental: surgical implant devices, dental products and high‑reliability medical instrument components complying with ASTM F562 and ISO 5832‑6
Motorsport & High‑Performance Equipment: high‑load springs, critical fasteners and structural components

Why Choose ZYTC Alloy for MP35N UNS R30035

As an experienced Chinese manufacturer and stockist of specialty cobalt‑nickel superalloys, ZYTC Alloy strictly controls each production stage for MP35N alloy: raw‑material inspection, VIM‑VAR melting, hot working, solution treatment, work hardening, aging and finished‑product verification. We deliver material meeting AMS, medical implant and NACE sour‑gas requirements, supporting both stock sales and custom‑order production for global clients from medical device manufacturers, offshore energy operators and high‑tech industrial enterprises.

If you are sourcing certified MP35N UNS R30035 round bar, tube, wire, sheet or plate, contact ZYTC Alloy to obtain technical datasheets, full specification documentation and competitive factory quotations.

📧 Email: dominic@zytc-steel.com
📲 WhatsApp: +86 13132148618

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