What is GH2903?
GH2903 is a high-performance alloy with iron base superalloy. This comprehensive guide covers chemical composition, mechanical properties, and machining characteristics per GB/T or ASTM standards.
Chemical Composition
| Element | Content (%) | Standard |
|---|---|---|
| Ni | 34.0-39.0 | ASTM/GB |
| Cr | 13.5-16.0 | ASTM/GB |
| Fe | Balance | ASTM/GB |
| Nb | 0.60-1.50 | ASTM/GB |
| C | ≤0.08 | ASTM/GB |
Mechanical Properties
| Property | Value | Standard |
|---|---|---|
| Tensile Strength | ≥1080 MPa | ASTM/GB |
| Yield Strength | ≥835 MPa | ASTM/GB |
| Elongation | ≥2% | ASTM/GB |
| Hardness | 290 HV | HV |
| Density | 8.10 g/cm³ | 20°C |
Key Features
- High temperature performance
- Excellent corrosion resistance
- High strength at elevated temperatures
- Good oxidation resistance
- Excellent creep resistance
Applications
- Aerospace turbine components
- Jet engine parts
- High temperature industrial equipment
- Chemical processing equipment
- Power generation components
Machinability
GH2903 has moderate machinability. Recommended: Carbide tools, cutting speed 30-60 m/min, feed 0.10-0.25 mm/rev, generous coolant.
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