Primetals Mill Duty Grease

Premium steel mill grease

Equipment lubricant recommendations

Data sheets

Product Description

Primetals Mill Duty Grease is an extended service lithium complex grease specifically designed for use in long rolling equipment manufactured by Primetals Technologies. It is designed to outperform conventional steel mill greases by a combination of high performance additives, robust ISO VG 220 base oil and proprietary manufacturing technology.  In service it provides strong adhesion, structural stability and resistance to water contamination for excellent protection against rust and corrosion.  In addition, Primetals Mill Duty Grease offers excellent high temperature wear protection, with its high technology performance additives allowing for operating temperatures of 140º C (284°F).


Primetals Mill Duty Grease is designed to perform in challenging steel mill operating conditions that include high temperature, water contamination, shock loading and extended re-lubrication intervals.


Features and Benefits

Primetals Mill Duty Grease utilizes the same technology found in Mobilgrease XHP 221, a product whose demonstrated performance has made it a popular choice of Primetals Technologies equipment owners worldwide.  It is formulated to provide excellent oxidation stability as well as anti-wear and EP protection. 



Advantages and Potential Benefits

Strong resistance to water washout and


Lubrication and protection in the most severe

water exposure conditions

Highly adhesive and cohesive thickener structure

Helps reduce leakage and extend re-lubrication

intervals for reduced maintenance

Excellent rust and corrosion resistance

Prevents damage to metal surfaces in hot, humid and wet environments

Resists thermal, oxidative and structural degradation at high temperatures

Enhances grease life and bearing protection in hot applications to reduce maintenance and repair costs

Excellent anti-wear and EP


Protects equipment exposed to sliding wear to extend operating life and help reduce unscheduled downtime

Broad multi-purpose applicatio

Provides potential for inventory rationalization and reduced inventory costs



Primetals Mill Duty Grease can be used in a wide variety of long rolling mill applications. Its NLGI Grade 1 penetration makes it ideal for use in automatic grease systems where it can reduce grease line plugging and related maintenance. Primetals Mill Duty Grease is supported with the joint expertise and field technical services offered by Mobil and Primetal Technologies. 



Properties and Specifications





Color, Visual

Dark blue

Penetration, 60X, 0.1 mm, ASTM D217


Dropping Point, °C, ASTM D2265


Base Oil Viscosity of Greases @ 40 C, mm2/s, AMS 1697


Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266


Corrosion Preventive Properties, Rating, ASTM D1743


SKF Emcor Rust Test, Distilled Water, ASTM D6138


Roll Stability, Penetration Consistency Change, 0.1 mm, ASTM D1831


Four-Ball Extreme Pressure Test, Weld Point, kgf, ASTM D2596


Oxidation Stability, Pressure Drop, 100 h, kPa, ASTM D942


Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048


Timken OK Load, lb, ASTM D2509


Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @