MP35N Round Bar
MP35N Round Bar | UNS R30035 AMS 5844 Nickel Cobalt Alloy Bar
Product Short Description
MP35N Round Bar is a high-performance nickel-cobalt-chromium-molybdenum alloy bar designed for demanding applications requiring ultra-high strength, excellent corrosion resistance, good toughness and non-magnetic performance. Also known as UNS R30035, MP35N alloy is widely used in aerospace fasteners, oil and gas sour service components, marine hardware, medical devices, precision springs, valve stems, pump shafts and high-strength mechanical parts.
SASA ALLOY supplies MP35N round bars, rods and custom machined bar stock according to AMS 5758, AMS 5844, AMS 5845, ASTM F562, NACE MR0175 / ISO 15156 and customer-specific requirements. Our MP35N alloy bars can be supplied with chemical analysis, mechanical testing, PMI testing, UT testing, dimensional inspection and EN 10204 3.1 material certificate.ain Keywords: MP35N Round Bar, UNS R30035 Round Bar, AMS 5844 MP35N Bar, ASTM F562 MP35N, Nickel Cobalt Alloy Bar, MP35N Alloy Supplier
Product Parameters
| Product Name | MP35N Round Bar / MP35N Rod / UNS R30035 Nickel Cobalt Alloy Bar |
|---|---|
| Material Grade | MP35N / UNS R30035 |
| Material Type | Nickel-Cobalt-Chromium-Molybdenum High Strength Alloy |
| Standards | AMS 5758, AMS 5844, AMS 5845, ASTM F562, NACE MR0175 / ISO 15156, Customer Standard |
| Diameter Range | 3 mm – 300 mm, customized size available |
| Length | 1000 mm – 6000 mm, cut-to-size available |
| Surface Finish | Black, Peeled, Ground, Polished, Bright |
| Condition | Solution Treated, Cold Worked, Aged, Work Strengthened, Custom Heat Treatment |
| Processing Service | Cutting, Grinding, Peeling, Turning, Centerless Grinding, Machining |
| Certificate | EN 10204 3.1, Material Test Certificate, Third-Party Inspection Support |
Chemical Composition
The chemical composition of MP35N Round Bar provides excellent strength, corrosion resistance, toughness and non-magnetic performance. The following composition range is for general reference. Final values should be confirmed according to the required standard and material certificate.
| Element | Typical Content |
|---|---|
| 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% |
| Phosphorus (P) | ≤ 0.015% |
| Sulfur (S) | ≤ 0.010% |
| Boron (B) | ≤ 0.015% |
Mechanical Properties
MP35N Round Bar can achieve different strength levels depending on heat treatment, cold work and aging condition. The following values are typical reference data and should be confirmed according to AMS, ASTM, NACE or customer-specific requirements.
| Condition | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| Solution Annealed | Approx. 896 MPa / 130 ksi | Approx. 379 MPa / 55 ksi | Approx. 65% | Approx. 90 HRB |
| AMS 5844 Work Strengthened | Approx. 1758 MPa / 255 ksi | Approx. 1551 MPa / 225 ksi | Approx. 12% | Approx. 45 HRC |
| Work Strengthened + Aged | Approx. 1793 – 2068 MPa / 260 – 300 ksi | Depends on condition | Depends on condition | High-strength aged condition |
| NACE MR0175 Condition | Controlled by NACE requirement | Controlled by NACE requirement | Depends on diameter and condition | Hardness controlled for sour service |
Note: MP35N mechanical properties are strongly affected by cold reduction, aging temperature, diameter and final specification. Please contact SASA ALLOY for confirmed mechanical property requirements before ordering.
Common Size Table
SASA ALLOY can supply MP35N Round Bar in common metric and inch sizes. Customized diameter, tolerance and cut length are available according to project requirements.
| Metric Diameter | Approx. Inch Size | Common Length | Surface Option |
|---|---|---|---|
| 6 mm | 1/4 inch | 1000 – 3000 mm | Bright / Ground |
| 8 mm | 5/16 inch | 1000 – 3000 mm | Bright / Ground |
| 10 mm | 3/8 inch | 1000 – 4000 mm | Bright / Polished |
| 12.7 mm | 1/2 inch | 1000 – 4000 mm | Peeled / Ground |
| 16 mm | 5/8 inch | 1000 – 5000 mm | Peeled / Ground |
| 20 mm | 3/4 inch | 1000 – 6000 mm | Peeled / Polished |
| 25.4 mm | 1 inch | 1000 – 6000 mm | Peeled / Ground |
| 38.1 mm | 1-1/2 inch | 1000 – 6000 mm | Peeled / Ground |
| 50.8 mm | 2 inch | 1000 – 6000 mm | Black / Peeled / Ground |
| 76.2 mm | 3 inch | 1000 – 6000 mm | Black / Peeled |
| 101.6 mm | 4 inch | 1000 – 6000 mm | Black / Peeled |
Different Specifications Comparison
MP35N alloy bars are supplied under different specifications depending on final application, strength condition and testing requirements. Selecting the correct specification is important for aerospace, medical, sour gas and precision engineering projects.
| Specification | Typical Product Form | Condition / Requirement | Typical Application |
|---|---|---|---|
| AMS 5758 | Bar / Forging Stock | Solution heat treated VIM-VAR material | Aerospace and high-performance components |
| AMS 5844 | Round Bar | Solution treated and work strengthened | High-strength aerospace fasteners and precision parts |
| AMS 5845 | Round Bar | Solution treated, work strengthened and aged | High-strength parts requiring aged condition |
| ASTM F562 | Bar / Wire / Strip | Surgical implant alloy requirement | Medical implant and surgical device applications |
| NACE MR0175 / ISO 15156 | Round Bar / Components | Hardness and condition controlled for sour service | Oil & Gas, H2S and sour gas environments |
Equivalent Standards and International Names
MP35N is recognized internationally by several material names and specifications. Buyers should confirm the exact standard, heat treatment condition, diameter tolerance and inspection requirement before placing an order.
| Common Name | MP35N Alloy |
|---|---|
| UNS Number | UNS R30035 |
| Material Type | Nickel-Cobalt-Chromium-Molybdenum Alloy |
| Aerospace Standards | AMS 5758, AMS 5844, AMS 5845 |
| Medical Standard | ASTM F562, ISO 5832-6, BS 7252-6 |
| Sour Service Standard | NACE MR0175 / ISO 15156 |
| Chinese Equivalent | No direct GB equivalent; usually supplied according to UNS / AMS / ASTM standard |
Production Process Flow
1. Raw Material Control
The production of MP35N Round Bar starts from controlled raw material selection and alloy melting requirement. For critical applications, VIM-VAR melting practice is commonly requested to improve cleanliness, stability and material consistency.
2. Melting and Ingot Preparation
The alloy is produced through vacuum induction melting and vacuum arc remelting to obtain a clean and uniform alloy structure suitable for high-strength and corrosion-resistant applications.
3. Forging / Hot Rolling
The ingot is processed by forging or hot rolling into bar stock. Strict temperature control is important to maintain material structure and reduce internal defects.
4. Solution Treatment
Solution heat treatment helps prepare the alloy for further strengthening and ensures stable metallurgical performance.
5. Cold Working and Aging
MP35N develops high strength through cold working and aging. The final condition is selected according to AMS, ASTM, NACE or customer-specific requirements.
6. Surface Finishing
Final surface processing may include peeling, grinding, turning, polishing or bright finishing to meet dimensional tolerance and surface quality requirements.
7. Final Inspection and Packing
Before shipment, SASA ALLOY performs dimensional inspection, surface inspection, PMI testing, mechanical property review and certificate verification according to order requirements.
Product Inspection
SASA ALLOY provides strict quality inspection for MP35N Round Bar to ensure material reliability, traceability and compliance with international standards.
- Chemical Composition Analysis: Confirms Ni, Co, Cr, Mo and trace elements according to required standard.
- PMI Testing: Verifies material grade and prevents material mix-up before shipment.
- Mechanical Testing: Includes tensile strength, yield strength, elongation and reduction of area when required.
- Hardness Testing: Especially important for AMS and NACE controlled conditions.
- UT Testing: Ultrasonic inspection can be arranged for internal defect control.
- Dimensional Inspection: Diameter, length, straightness and tolerance are checked before packing.
- Surface Inspection: Confirms surface condition such as peeled, ground, polished or bright finish.
- Certificate Review: EN 10204 3.1 material certificate and heat number traceability are available.
- Third-Party Inspection: SGS, BV, TÜV or customer-appointed inspection can be supported.
Product Packaging
MP35N Round Bar is a high-value alloy material, so export packaging must protect the bars from moisture, impact, surface damage and mixing during international transportation.
- Plastic Film Protection: Used to protect polished or ground bar surfaces from scratches.
- Waterproof Wrapping: Prevents moisture during sea and air shipment.
- Wooden Case Packing: Suitable for small diameter bars, precision cut pieces and high-value alloy stock.
- Wooden Pallet Packing: Suitable for long bars and batch shipment.
- Bundle Packing: Used for regular diameter bar stock with protective separation.
- Marking: Grade, heat number, size, standard and customer PO number can be marked on labels or bars.
Applications
MP35N Round Bar is selected when conventional stainless steel or nickel alloy materials cannot meet combined requirements for strength, corrosion resistance, toughness and non-magnetic performance.
Aerospace Industry
Used for aerospace fasteners, pins, bolts, tie rods, springs and high-strength precision components requiring excellent mechanical performance and stability.
Oil & Gas Sour Service
MP35N alloy is suitable for valve stems, pump shafts, downhole tools, fastener systems and sour gas service components exposed to hydrogen sulfide, chloride and high-stress environments.
Medical and Surgical Devices
When supplied according to ASTM F562 or ISO 5832-6 requirements, MP35N can be used for medical implant components, surgical devices, bone plates, screws and pins.
Marine Engineering
Its resistance to seawater, crevice corrosion and stress corrosion makes MP35N Round Bar suitable for marine fasteners, shafts, springs and critical corrosion-resistant parts.
Chemical Processing
MP35N Round Bar is used for pump components, valve parts, shafts, high-strength connectors and corrosion-resistant mechanical components in aggressive chemical environments.
Precision Springs and Non-Magnetic Components
MP35N is also used in precision springs, electrical components, sensing devices and non-magnetic assemblies requiring stable performance under load.
Why Choose SASA ALLOY?
SASA ALLOY is a China-based supplier and exporter of nickel alloys, cobalt alloys, stainless steel, titanium alloys and corrosion-resistant materials for global industrial buyers.
- Special Alloy Supply Capability: We supply MP35N, Inconel, Hastelloy, Monel, Nickel Alloy, Nimonic, Titanium Alloy and other high-performance materials.
- International Standards Support: Materials can be supplied according to AMS, ASTM, ASME, EN, DIN, JIS, GB, NACE and customer standards.
- Quality Control: PMI testing, UT testing, mechanical testing, hardness testing, chemical analysis and dimensional inspection can be arranged.
- Material Traceability: Heat number control and EN 10204 3.1 material certificate are available.
- Custom Processing: Cutting, peeling, grinding, polishing, machining and customized size production are supported.
- Export Experience: Professional wooden case packing, waterproof wrapping and global logistics support for industrial projects.
- Technical Communication: Our team helps customers confirm grade, standard, condition, tolerance, testing and delivery requirement before production.
FAQ
What is MP35N Round Bar?
MP35N Round Bar is a nickel-cobalt-chromium-molybdenum high-performance alloy bar with high strength, excellent corrosion resistance, good toughness and non-magnetic properties.
What is the UNS number of MP35N?
The UNS number of MP35N is UNS R30035.
What standards are available for MP35N Round Bar?
Common standards include AMS 5758, AMS 5844, AMS 5845, ASTM F562 and NACE MR0175 / ISO 15156.
Is MP35N suitable for sour gas service?
Yes. MP35N can be supplied for sour service applications when the material condition and hardness meet NACE MR0175 / ISO 15156 requirements.
Can MP35N be used for medical applications?
Yes. MP35N may be used for medical and surgical implant applications when supplied according to ASTM F562, ISO 5832-6 or related medical material requirements.
What surface finishes are available?
Available surface finishes include black, peeled, ground, polished and bright surface.
Can SASA ALLOY provide PMI testing?
Yes. SASA ALLOY can provide PMI testing to verify material grade and prevent material mix-up before shipment.
Can you supply cut-to-size MP35N bars?
Yes. MP35N Round Bar can be supplied in full length or cut-to-size according to customer drawings or purchase requirements.
What information should I provide when requesting a quotation?
Please provide grade, standard, diameter, length, quantity, condition, surface finish, tolerance, testing requirement, certificate requirement and delivery destination.
