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GH3128 High-Temperature Alloy Rod
GH3128 is a nickel-based superalloy strengthened by tungsten (W), molybdenum (Mo) solid-solution hardening and reinforced with boron (B), cerium (Ce), and zirconium (Zr) for grain boundary strengthening. It exhibits:
- High plasticity and excellent creep resistance at elevated temperatures (up to 950°C).
- Superior oxidation resistance and thermal corrosion resistance in harsh environments.
- Outstanding weldability, suitable for argon arc welding, spot welding, and seam welding.
- Better comprehensive performance compared to similar alloys like GH3044 and GH3536.
Chemical Composition (wt%)
Element | Min (%) | Max (%) |
Ni | Bal. | – |
Cr | 19.0 | 22.0 |
Mo | 7.5 | 9.0 |
W | 7.5 | 9.0 |
Fe | – | 1.5 |
Ti | 0.4 | 0.8 |
Al | 0.4 | 0.8 |
C | – | 0.05 |
Si | – | 0.8 |
Mn | – | 0.5 |
P | – | 0.013 |
S | – | 0.013 |
B | – | 0.005 |
Ce | – | 0.05 |
Zr | – | 0.06 |
I. GH3128 Alloy Rod Performance Characteristics
1. Excellent High-Temperature Performance: Maintains high strength and ductility at 950°C, with stable creep properties, suitable for long-term high-temperature operation.
2. Oxidation and Corrosion Resistance: A Cr₂O₃ protective film forms on the surface, effectively resisting oxidation, sulfidation, and fluoridation corrosion.
3. Excellent Processability: Resistant to cracking during stamping and welding, the rod’s high ductility makes it suitable for precision machining.
4.Strengthening Mechanism: Solid solution strengthening with tungsten and molybdenum, and grain boundary strengthening with boron and cerium, provides a combination of high-temperature strength and toughness.
II. Main Applications of GH3128 Alloy Rod
1. Aerospace: Used in critical high-temperature components such as aircraft engine combustion chambers, afterburner casings, and rocket combustion chamber baffles.
2. Energy: Suitable for gas turbine blades, improving power generation efficiency and processing yield.
3.Precision Parts: Rod form is suitable for manufacturing high-precision components such as turbine disks and drive shafts.
Surface Treatment
- Solution Treatment: 1140–1180°C, air-cooled (standard delivery condition).
- Pickling & Passivation: For corrosion resistance enhancement.
- Polishing/Grinding: Available upon request for precision applications.
Why Choose Us ?
- Strict Compliance: Meets GJB 1952-1994, GJB 2612-1996, and ASTM B166-17 standards.
- Advanced Manufacturing: Vacuum induction melting + electroslag remelting (ESR) for high purity.
- Customizable: Rod diameters (Φ5–150mm), lengths (1–6m), and heat treatment options.
- Quality Assurance: Full traceability with material test reports (MTRs).
Applications & Industries
Aerospace:
High-power density actuators.
Electronics:
Precision sensors & MEMS components.
Energy:
Magnetic coupling devices for turbines.
Frequently Asked Questions
Q1: What’s the maximum service temperature?
A: 950°C long-term; short-term peaks up to 1000°C.
Q2: Can GH3128 rods be machined easily?
A: Yes, but cold working requires intermediate annealing due to work hardening.
Q3: How to distinguish GH3128 from similar alloys?
A: Check Cr/W/Mo content and request mill certificates.
Q4: Is GH3128 resistant to thermal cycling?
A: Yes, it withstands >5,000 thermal cycles (750°C–room temperature) without microstructural degradation.
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