In the field of high-performance nickel-cobalt alloys, there is no "one-size-fits-all" solution. For purchasing managers and design engineers, the trade-off between strength and temperature is a major challenge.
The risks of MP35N: While the strength of MP35N (UNS R30035) up to 1800 MPa may be appealing, its use in furnace baffles at 700°C will cause it to soften and fail immediately.
The risks of GH3030: Using heat-resistant GH3030 (equivalent to Nimonic 75) in high-tension fasteners or deep-sea valves can lead to structural collapse due to its lack of the mechanical "stiffness" required to withstand extreme loads.
At Gnee Alloy, we are dedicated to helping you solve this problem and ensuring comprehensive structural integrity for your mission-critical applications.
Click to get a GH3030 product quote
What are GH3030 and MP35N cold-drawn nickel round bars?
What are GH3030 and MP35N cold-drawn nickel round bars?
GH3030 and MP35N are two specialized high-performance high-temperature alloys. Cold-drawn nickel bars made from these materials possess excellent mechanical properties and precise dimensional tolerances. Both are suitable for extreme environments, but their engineering applications are quite different.
What are the applications of MP35N?
MP35N is widely used in oil and gas drilling and extraction, fields that demand high material strength and corrosion resistance, especially under high pressure and high temperature environments. MP35N's high yield strength enables drilling equipment to withstand extremely high stresses.
1. GH3030 and MP35N Material Overview
| Parameter | GH3030 | MP35N |
|---|---|---|
| Material Type | Wrought Nickel-based Superalloy | Cobalt-based Ultra-High Strength Alloy |
| Strengthening Mechanism | Solid-solution strengthening (Cr + trace Ti) | Age hardening (intermetallic phases) |
| Product Forms | Bar, plate, tube, strip, wire | Bar, wire, strip |
| Typical Applications | Combustion chambers, furnace components, high-temperature tubing | Surgical implants, marine cables, springs, fasteners, aerospace components |
| Maximum Service Temperature (Load-Bearing) | ~800°C | ~400°C |
| Maximum Service Temperature (Oxidation) | ~1000°C | ~600°C |
2. Comparison of chemical composition of GH3030 and MP35N (wt%)
| Element | GH3030 | MP35N | Key Difference |
|---|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | 33.0 – 37.0 | GH3030 has much higher Ni |
| Cobalt (Co) | – | 33.0 – 37.0 | MP35N contains high Co |
| Chromium (Cr) | 19.0 – 22.0 | 19.0 – 21.0 | Similar |
| Molybdenum (Mo) | – | 9.0 – 10.5 | MP35N contains Mo |
| Iron (Fe) | ≤ 1.5 | ≤ 1.0 | Both low |
| Titanium (Ti) | 0.15 – 0.35 | – | GH3030 contains Ti |
| Aluminum (Al) | ≤ 0.15 | – | GH3030 contains trace Al |
| Carbon (C) | ≤ 0.12 | ≤ 0.025 | MP35N has lower C |
| Manganese (Mn) | ≤ 0.70 | ≤ 0.15 | – |
| Silicon (Si) | ≤ 0.80 | ≤ 0.15 | – |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.015 | – |
| Sulfur (S) | ≤ 0.020 | ≤ 0.010 | – |
| Niobium (Nb) | – | – | – |
3. Comparison of room temperature mechanical properties of GH3030 and MP35N
| Property | GH3030 (Annealed) | MP35N (Aged) | Advantage |
|---|---|---|---|
| Tensile Strength, Ultimate (MPa) | ≥ 685 (99 ksi) | ≥ 1240 – 1790 (180-260 ksi) | MP35N (~2x higher) |
| Tensile Strength, Yield (MPa) | ≥ 295 (43 ksi) | ≥ 1030 – 1650 (150-240 ksi) | MP35N (~3-5x higher) |
| Elongation (%) | ≥ 30 | 8 – 20 | GH3030 (more ductile) |
| Reduction of Area (%) | ≥ 50 | 20 – 50 | GH3030 |
| Hardness (HRC) | ~80-85 HRB (~15-20 HRC) | 35 – 50 HRC | MP35N harder |
| Modulus of Elasticity (GPa) | ~210 | ~230 | MP35N stiffer |
| Poisson's Ratio | 0.30 – 0.31 | 0.30 | Similar |
| Density (g/cm³) | 8.4 | 8.43 | Similar |
Click to download the GH3030 alloy PDF file now
GH3030 and MP35N Features and Applications
GH3030 (High-Temperature Superalloy)
GH3030 is a solution-strengthened nickel-chromium alloy (approximately 80% nickel and 20% chromium) renowned for its high-temperature stability.
Key properties: Excellent oxidation resistance, resistance to thermal fatigue, and high ductility at temperatures up to 800°C. It maintains good cold stamping and welding properties.
Typical applications: Turbine engine combustion chamber components, parts requiring oxidation resistance under low loads, and high-temperature chemical equipment.
MP35N (Ultra-High Strength Superalloy)
MP35N is a non-magnetic quaternary nickel-cobalt-chromium-molybdenum alloy (UNS R30035). It is part of a multiphase alloying system that achieves the highest strength of all metallic materials through a combination of cold drawing and aging processes.
Key properties: Ultra-high tensile strength, excellent toughness, ductility, and outstanding resistance to hydrogen embrittlement, sulfidation, and stress corrosion cracking (SCC) in harsh chloride environments.
Typical applications: oil and gas extraction equipment, aerospace springs, medical devices, and marine equipment.
6. Why choose cold-drawn round bars?
Cold drawing is a process of forming metal at room temperature by extrusion through a die.
For MP35N alloy, this strain hardening (combined with subsequent heat treatment/aging) is crucial for achieving its breakthrough tensile strength (260 to 300 ksi).
For both alloys, cold drawing also yields a smooth surface and extremely precise dimensional tolerances compared to hot-rolled products.
7. Performance Comparison of GH3030 Cold-Drawn Round Bars
| Technical Feature | GH3030 (Heat Specialist) | MP35N (Strength Titan) | Commercial Impact |
| Material Base | Nickel-Chromium | Cobalt-Nickel-Cr-Mo | MP35N is a premium investment. |
| Tensile Strength | ~ 600 - 800 MPa | ≥ 1800 MPa (Elite) | MP35N is 3x Stronger. |
| Max Service Temp | 800°C (1472°F) | 315°C - 450°C | GH3030 wins in the "Fire Zone." |
| Hardness (Aged) | 130 - 180 HB | 38 - 50+ HRC | MP35N for extreme wear/tension. |
| Corrosion Resistance | High-Temp Oxidation | Ultimate (SCC & Sour Gas) | MP35N for Deep Sea/Chemical. |
| Strengthening | Solid Solution | Work Hardened + Aged | Different engineering roles. |
Why Choose Gnee as Your Nickel-Based Alloy Supplier
Regardless of the grade, we provide the metallurgical certainty your project demands:
✅️VIM + VAR Melting: Ensuring ultra-pure materials for both GH3030 and MP35N to maximize fatigue life.
✅️h8-h11 Precision Ground: We offer Centerless Ground bright rods with mirror finishes (Ra ≤ 0.4μm) for CNC automatic feeders.
✅️MTC 3.1 Traceability: Full EN 10204 3.1 documentation provided with every heat number.
✅️Wholesale Inventory: Large stock of standard diameters ready for Fast Global Shipping.
Gnee Alloy GH3030 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Gnee Alloy GH3030 Product Packing
⚒️Gnee Alloy Production Line Equipment and Product Testing
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Can I use MP35N for high-temperature springs?
A: Only up to 450°C. Beyond this, MP35N begins to lose its cold-work strengthening (stress relaxation). For springs operating at 600°C+, you must switch to Inconel X-750 or GH4169.
Q2: Which alloy is easier for CNC machining?
A: GH3030. MP35N work-hardens so rapidly that it requires specialized tooling and slow cutting speeds. We supply both in an optimized state to minimize your procurement budget for tooling.
Q3: Is MP35N equivalent to Inconel 718 in strength?
A: No, MP35N is much stronger. While Inconel 718 peaks at ~1300 MPa, cold-drawn and aged MP35N can exceed 1800 MPa, making it the premier choice for the highest-load fasteners.
Q4: Do you offer trial orders for material validation?
A: Absolutely. As a Reliable Supplier, we support Innovation. We offer Flexible MOQs for certified specimens and test coupons.
