sinopec-7012-very-low-temperature-grease
Great Wall 7012 Very Low Temperature Grease
MIL-G-7421 Equivalent Lubrication for Extreme Cold Aerospace Applications
Product Overview
Great Wall 7012 Very Low Temperature Grease is a premium synthetic lubricant specifically developed for extreme low-temperature environments down to –70 °C, where conventional greases lose fluidity, suffer oil separation, or fail to provide reliable lubrication. The grease is formulated with synthetic base oil thickened by a soap-based thickener, enhanced with structural improvers and antioxidant additives, delivering excellent low-temperature mobility, mechanical stability, and long-term reliability.
Manufactured in accordance with Q/SH3031 0199 and equivalent in performance to products meeting U.S. MIL-G-7421 specification, Great Wall 7012 is widely used in aviation, radar systems, aircraft control mechanisms, and ultra-low-temperature instrument bearings. Its balanced formulation ensures stable lubrication performance during cold starts, continuous operation, and temperature fluctuations commonly encountered in aerospace and high-altitude environments.
Key Performance Characteristics
Outstanding Extreme Low-Temperature Performance
Great Wall 7012 maintains low apparent viscosity at –70 °C (≤1500 Pa·s), ensuring smooth start-up and consistent lubrication film formation even in extremely cold climates. This makes it especially suitable for sensitive precision components that require minimal starting torque.
Excellent Mechanical Stability
The grease exhibits strong resistance to mechanical shear and structural breakdown, reducing the risk of grease softening or leakage during prolonged service. Low bearing leakage characteristics ensure effective lubrication retention in moving assemblies.
Low Volatility and Oxidation Resistance
Controlled evaporation loss and advanced antioxidant additives help maintain grease consistency and lubricating properties at elevated temperatures up to +120 °C, extending relubrication intervals and component service life.
Reliable Corrosion Protection
Great Wall 7012 passes copper corrosion testing, providing dependable protection for non-ferrous and ferrous metal components in humid or variable operating environments.
Typical Applications
Great Wall 7012 Very Low Temperature Grease is recommended for lubrication of equipment operating under extreme cold, precision control, or aerospace service conditions, including:
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Radar antenna rotation mechanisms
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Aircraft air conditioning systems
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Aircraft control systems and actuators
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Autopilot and servo drive devices
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Aircraft wastewater and auxiliary systems
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Ultra-low-temperature instrument and sensor bearings
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Various moving parts controlled by aircraft fuselage systems
Operating Temperature Range: –70 °C to +120 °C
Typical Technical Data
| Property | Typical Value |
|---|---|
| Appearance | Light grey to light brown homogeneous grease |
| Dropping Point | ≥160 °C |
| Penetration (1/4 cone, 0.1 mm) | 65–80 |
| Apparent Viscosity (–70 °C, 10 s⁻¹) | ≤1500 Pa·s |
| Oil Separation | ≤30 % (m/m) |
| Evaporation Loss (120 °C) | ≤2.0 % |
| Flash Point | 120 °C |
| Copper Corrosion (100 °C, 3 h) | Pass |
| Oxidation Stability (100 °C, 100 h) | ΔP ≤0.034 MPa |
International Brand Equivalence & Spec Benchmarking
Great Wall 7012 is commonly positioned as a technically equivalent, cost-effective alternative to internationally recognized MIL-G-7421 compliant or extreme low-temperature aerospace greases.
Engineering Comparison Table (Reference)
| Parameter | Great Wall 7012 | Klüber | Mobil | Shell |
|---|---|---|---|---|
| Typical Comparable Product | — | Klüber Isoflex NBU 15 (Low-temp reference) | Mobilgrease 28 | AeroShell Grease 7 |
| Applicable Standard | MIL-G-7421 (Equivalent) | Manufacturer spec | MIL-PRF-81322 | MIL-G-23827 |
| Base Oil Type | Synthetic oil | Synthetic oil | Synthetic oil | Mineral / synthetic |
| Thickener Type | Soap-based | Barium / complex | Clay (Bentone) | Clay |
| Operating Temp. Range (°C) | –70 to +120 | –50 to +120 | –54 to +177 | –73 to +149 |
| Apparent Viscosity at ≤ –70 °C | ≤1500 Pa·s | Higher | Medium | Medium |
| Low-Temp Start-up Torque | Very low | Low | Low | Low |
| Aerospace Suitability | Yes | Yes | Yes | Yes |
| Positioning | Extreme cold, MIL-G-7421 alternative | Premium precision | Premium aviation | Premium aviation |
Technical Positioning Note:
Compared with Mobilgrease 28 and AeroShell Grease 7, Great Wall 7012 focuses on ultra-low-temperature fluidity and low bearing resistance, making it particularly suitable for instrument bearings, control systems, and cold-region aerospace equipment operating near or below –70 °C.
Packaging, Storage & Handling
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Standard Package: 250 g plastic container
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Store in a clean, dry, and shaded environment
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Clean lubrication points thoroughly before application
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Reseal container immediately after use to prevent contamination
Conclusion
Great Wall 7012 Very Low Temperature Grease delivers reliable, stable lubrication in extreme cold environments, combining excellent low-temperature fluidity, mechanical stability, and oxidation resistance. With performance comparable to MIL-G-7421 compliant international brands such as Klüber, Mobil, and Shell, it represents a technically sound and economically competitive solution for aerospace, radar, and precision instrumentation applications.
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