Base Oil SN 350

available

Base Oil SN 350 (Medium-Heavy Viscosity Group I)

“The robust film-former: the heavier base for gear oils, marine lubricants, and heavy-duty engine oils.” Arnico’s Base Oil SN 350 is the medium-to-high viscosity, highly durable paraffinic Group I base stock designed for applications where load-carrying and film strength are paramount. As the foundational fluid for heavier-grade engine oils, high-load industrial and automotive gear oils, and circulating oils, it provides a powerful protective lubricating film under the most severe pressure and temperature conditions. For formulators tackling demanding, heavy-duty applications, our SN 350 delivers the robust, reliable foundation they need.

Description More

1. Product Introduction & Main Application

Arnico’s Base Oil SN 350 is a medium-to-high viscosity Group I mineral base oil obtained from the solvent refining of paraffinic crude oil lube cuts. This oil, with its ability to form a strong lubricating film and provide good thermal stability, is the base material for the production of heavy-duty diesel engine oils, high-load industrial gear oils, circulating oils, and high-performance industrial lubricants.

2. Technical Specifications

Technical Parameter	Standard SN 350 Grade	Premium SN 350 Grade	Unit
Viscosity at 40°C	65 – 75	60 – 70	cSt
Viscosity at 100°C	8.0 – 9.0	8.5 – 9.5	cSt
Viscosity Index (VI)	≥ 95	≥ 98	–
Flash Point (COC)	≥ 220	≥ 230	°C
Pour Point	≤ -6	≤ -9	°C
Sulfur	≤ 0.5	≤ 0.4	%
Color (ASTM)	≤ 2.5	≤ 2.0	–

3. Features & Benefits

A Strong, Pressure-Resistant Lubricating Film: Its higher viscosity provides excellent protection for components under heavy loads and mechanical shock.
Good Thermal & Oxidation Stability: Resists degradation and sludge formation at the high temperatures found in circulating systems and gearboxes.
A High Flash Point: Offers enhanced safety in high-temperature applications.
Excellent Additive Compatibility: Good acceptance of anti-wear and extreme pressure (EP) additive packages for specialized lubricants.

4. Industrial Applications

Engine Oils: The base for heavy-duty diesel engine oils and SAE 40 and 50 monograde oils.
Industrial Gear Oils: The base for worm gear and high-load open gear oils.
Circulating Oils: A lubricant for centralized lubrication systems and large bearings.
Grease Manufacturing: The base fluid for high-viscosity lithium and complex greases.

5. Safety & Handling

MSDS (Material Safety Data Sheet): Prolonged skin contact can cause irritation and dryness. The Arnico MSDS file is available.
Storage Conditions: Store in dry, clean tanks, away from moisture, at ambient temperature. Filtration before use is recommended.
Personal Protective Equipment (PPE): The use of oil-resistant gloves and safety goggles is recommended.

6. Quality Assurance & COA

Arnico SN 350 shipments are accompanied by a complete Certificate of Analysis (COA) detailing the viscosity, viscosity index, and flash point.

Technical documents for the product Base Oil SN 350 including the Technical Data Sheet (TDS), Material Safety Data Sheet (MSDS), and Certificate of Analysis (COA), are available to customers upon request.

To receive these documents and further information, please contact our technical or sales department, or reach out to us via email.