MP35N Round Bars (UNS R30035, ASTM F562) combine ultra-high tensile strength with corrosion resistance and biocompatibility rarely found together in one alloy. Cold working and ageing take its yield strength well past 1380 MPa while retaining meaningful ductility, which is why fastener manufacturers, aerospace subcontractors and medical device OEMs specify it where standard stainless and nickel alloys cannot hold both the load and the corrosive environment.
Table of Contents:
MP35N (UNS R30035, W.Nr 2.4999) is a multiphase nickel-cobalt-chromium-molybdenum alloy. Strengthening comes mainly from cold work and age hardening rather than heat treatment alone: in the annealed condition its properties resemble a high-strength stainless steel, while cold-worked and aged material reaches yield strengths that few corrosion-resistant alloys can match without giving up ductility or corrosion performance.
Aurico Alloys LLP supplies MP35N round bars to ASTM F562 and the AMS 5758 / AMS 5844 / AMS 5845 specifications that cover its bar, wire and strip forms, with full material test certificates to EN 10204 3.1. The alloy's combination of strength and corrosion resistance is why it is a standard choice for oil & gas wireline and downhole hardware, high-strength aerospace fasteners, and orthopaedic and cardiovascular implant components.
As MP35N round bar suppliers in Mumbai, we work with fastener manufacturers, medical device OEMs and aerospace subcontractors who need traceable, certified material rather than a generic high-strength substitute, with export packaging and MTC EN 10204 3.1 on every order.
High-quality MP35N Round Bar ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP - MP35N round bar suppliers in Mumbai |
|---|---|
| Grade | MP35N (UNS R30035) |
| Standards | ASTM F562, AMS 5758, AMS 5844, AMS 5845 |
| Diameter Range | Quoted against the mill programme in force at the time of enquiry |
| Length | Quoted against the mill programme in force at the time of enquiry |
| Finish | Annealed, cold worked or age-hardened, per specification |
| Delivery | Stock and indent, cut to length, MTC EN 10204 3.1, export ready |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | R30035 |
| Werkstoff / EN number | 2.4999 |
| Density | 8.43 g/cm3 |
| Melting range | 1316-1443 °C |
| Rod and bar specification | ASTM F562 / AMS 5758 / AMS 5844 / AMS 5845 |
Identifiers and physical constants for MP35N. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP supplies MP35N round bars to fastener manufacturers, medical device OEMs and aerospace subcontractors across India and abroad, with full traceability and MTC EN 10204 3.1 on every order.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Cobalt (Co) | — | Balance |
| Nickel (Ni) | 33.00 | 37.00 |
| Chromium (Cr) | 19.00 | 21.00 |
| Molybdenum (Mo) | 9.00 | 10.50 |
| Iron (Fe) | — | 1.00 |
| Titanium (Ti) | — | 1.00 |
| Manganese (Mn) | — | 0.15 |
| Silicon (Si) | — | 0.15 |
| Carbon (C) | — | 0.025 |
| Boron (B) | — | 0.015 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.010 |
Composition limits for MP35N. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength, annealed (MPa) | ~1034 (150 ksi) |
| Yield Strength, annealed (MPa) | ~414 (60 ksi) |
| Yield Strength, cold worked & aged (MPa) | >1793 (260 ksi) |
| Elongation, cold worked & aged (% reduction of area) | ~40 |
| Hardness | 38 HRC min per spec; up to 55–60 HRC aged |
| Modulus of Elasticity (GPa) | 233 |
| Thermal Conductivity (W/m·°C) | 11.2 |
| Coefficient of Expansion (µm/m·°C) | 12.8 |
| Heat Treatment | Anneal 1038–1066°C (1900–1950°F); age 538–649°C (1000–1200°F) |
Sourced from Carpenter Technology's published MP35N data; density and melting range are in the Equivalent Grades table above.
Applications & Benefits
- Oil & Gas: Wireline cable, downhole tool components, packer springs and fasteners for sour and corrosive well service.
- Aerospace: High-strength fasteners, fittings and springs for airframe and engine applications where weight and load both matter.
- Medical: Orthopaedic and cardiovascular implant components, surgical instruments and guidewires, on the strength of the alloy's biocompatibility.
- Marine: Fasteners and fittings for corrosive, high-load marine environments.
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
MP35N Round Bars from Aurico Alloys LLP bring a rare combination of ultra-high strength and corrosion resistance to fasteners, springs and implant components, backed by full ASTM/AMS certification and MTC EN 10204 3.1 traceability. Talk to us about your MP35N requirement and we will confirm size, condition and lead time against the current mill programme.