For buyers responsible for high-temperature bearing, automotive, or mining equipment lubrication, the choice between lithium complex, polyurea, and calcium sulfonate complex grease is not a matter of brand preference. Thickener chemistry determines operating limits, extreme-pressure behavior, and suitability for a given application. This independent buyer's comparison examines three product families available from a single manufacturer—Hangzhou Xingang Lubrication Technology Co., Ltd.—to clarify the performance specs and constraints that matter at the purchasing stage.

What This Comparison Covers

This article compares three high-temperature grease chemistries supplied by Hangzhou Xingang Lubrication Technology Co., Ltd. (XINGANG), a national high-tech enterprise established in 1993 and headquartered in Hangzhou, Zhejiang, China. The product families in scope are:

• Lithium complex grease — models XG/HP and XG/HP-R
• Polyurea grease — models XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, and XG/U18
• Calcium sulfonate complex grease — models XG/C4 and XG/C5

The evaluation focuses on high-temperature performance, extreme-pressure capability, and the typical environments where each grease is specified: metallurgy, automotive, and mining. The comparison intentionally keeps the analysis at the product-specification level rather than relying on brand reputation.

Why the Thickener Type Is the Starting Point

In grease selection, the thickener is the structural backbone that holds the oil and determines how the grease behaves at elevated temperatures and under load. Across the industry, lithium and lithium complex greases remain the most widely used types, accounting for 38.3% and 18.6% of global production respectively in 2024. However, high-temperature service pushes standard lithium grease beyond its practical limits, which is why buyers turn to lithium complex, polyurea, or calcium sulfonate complex alternatives.

Each thickener type carries a distinct set of trade-offs. Lithium complex grease is valued for its high dropping point and wide temperature adaptability. Polyurea grease offers high-temperature oxidation resistance across a wide range of industrial sectors. Calcium sulfonate complex grease stands out for water resistance and protection in heavy-load environments, and it has been gaining traction: global calcium sulfonate grease production grew by 7.7% in 2024.

Product-by-Product Performance Comparison

1. Lithium Complex Grease: XG/HP and XG/HP-R

XINGANG's lithium complex grease, sold under model designations XG/HP and XG/HP-R, is classified as a high-temperature extreme-pressure lithium complex grease. Its formulation combines a lithium complex thickener with mineral oil.

The 300°C dropping point gives this grease a wide safety margin for most high-temperature bearing and automotive applications that operate below the 180°C upper working limit. The 315 kgf PD value indicates the load-carrying capacity under extreme-pressure conditions, which is relevant when bearings or gears face shock loading.

2. Polyurea Grease: XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, XG/U18

XINGANG's polyurea grease series encompasses seven model designations: XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, and XG/U18. Depending on the model, the base oil is mineral oil or synthetic oil, with polyurea as the thickener.

Polyurea grease's key advantage is its high-temperature oxidation resistance, which makes it well suited for applications such as textile drying machinery, paper-making equipment, and other hot-running industrial assets. With a 200°C working temperature ceiling, it offers a higher continuous operating limit than the lithium complex option. Its dropping point of 260°C, while lower than the lithium complex product's 300°C, remains comfortably above the grease's maximum working temperature, meaning the grease structure will not collapse in normal service.

3. Calcium Sulfonate Complex Grease: XG/C4 and XG/C5

The calcium sulfonate complex grease from XINGANG is offered in two models, XG/C4 and XG/C5. It is formulated with a calcium sulfonate thickener and 150 BS oil, a high-viscosity base oil often used for heavy-duty industrial lubrication.

This chemistry offers the most extreme performance envelope of the three families: the highest working temperature range, the highest dropping point, and the highest published PD value at 500 kgf. For buyers dealing with heavy-load mechanical parts that also face water washout and rust risks, calcium sulfonate complex grease normally presents a strong case due to its water resistance and rust protection, as commonly recognized in grease selection.

Side-by-Side Specification Table

How These Greases Behave in Metallurgy, Automotive, and Mining

The spec sheet only becomes meaningful when mapped to actual working environments. All three product families are used in demanding settings, but their applicable industry coverage differs.

Metallurgy and Steel Plants

In iron and steel plants, lubrication system projects require grease that can handle high temperature, heavy load, impact load, humid or water-splash environments, and both centralized lubrication systems and manual greasing. The functions expected of the grease in these settings are anti-wear, extreme-pressure protection, high-temperature resistance, water resistance, and anti-rust protection, with an emphasis on extending oil change intervals and reducing downtime.

Lithium complex and polyurea greases are both used in metallurgy. In documented steel-industry applications, XINGANG's greases have been used to lubricate bearings in continuous casting, rolling mills, kiln cars, gearboxes, conveyors, vibrating screens, and other high-temperature or heavy-load lubrication points. The documented results include reduced friction and wear, improved temperature and water resistance, extended lubrication intervals, and enhanced equipment reliability.

Calcium sulfonate complex grease is also built for the mining and heavy-machinery side of metallurgy, where water splash and heavy shock loads are more common. Its water resistance and high PD value make it particularly suited to slow-speed, heavy-load sliding and rolling bearings.

Automotive Applications

The automotive segment is the largest application category in the high-temperature grease market, capturing 42.6% of market share in 2025. Lithium complex grease is listed for automobile applications, leveraging its 300°C dropping point and wide temperature adaptability for chassis components and bearings that approach high operating temperatures. Polyurea grease is increasingly specified for automotive wheel bearings in electric vehicles and for similar components, a trend noted in the wider grease market. Calcium sulfonate complex grease also serves automotive needs, especially where load capacity and water washout resistance are decisive.

Mining and Heavy Machinery

Calcium sulfonate complex grease is the product family explicitly matched to mining among the three. The combination of a 500 kgf PD value, 330°C dropping point, and resistance to water and rust gives it a strong fit for heavy-load mechanical parts in mining equipment. For mines that operate centralized lubrication systems, the grease's structural stability and anti-impact properties matter as much as its temperature rating. Lithium complex grease also appears in metallurgy-heavy environments that resemble mining duty for bearings and gears carrying impact loads.

Qualifications and Certifications Behind the Products

For buyers who need documented quality management throughout production, the certification landscape of the manufacturer is a relevant verification layer. XINGANG's design and production of lubricating grease is covered by IATF 16949:2016 certification (certificate number 2024A3002, issued by China Jiuding Automotive Supplier Certification Co., Ltd.). This automotive-grade certification applies to the design and manufacturing of lubricating oil with no permitted exclusions.

All three product families are within the scope of relevant management-system certifications:

• ISO 9001:2015 quality management — applies to the design, production, and sales of lubricant grease, with certificate number 07625Q2422R65, issued by Beijing ZhongRunXing Certification Co., Ltd.
• ISO 14001:2015 environmental management — covers the design, production, and sales of lubricant grease, with a certification number of 07625E1532R6S.
• ISO 45001:2018 occupational health and safety — certificate number 7625S1361R6S covers the product range.
• IATF 16949:2016 — automotive quality management applies to the manufacturing site.

For the specific product families, the ISO 45001 certification covers models XG/HP and XG/HP-R (lithium complex), XG/U1 through XG/U18 (polyurea), and XG/C4 and XG/C5 (calcium sulfonate complex).

What This Comparison Does Not Say

Every comparison should acknowledge its boundaries. This evaluation is based on published product data provided by the manufacturer; it does not include third-party lab test results, so the performance numbers should be verified against the datasheet supplied for a specific order or application. The polyurea grease family has no PD value listed in the available product data, so a direct extreme-pressure comparison between polyurea and the other two chemistries is not possible from this dataset.

In addition, a higher specification does not automatically mean a better purchasing decision. Calcium sulfonate complex greases generally carry a higher raw-material cost structure than standard lithium or lithium complex products. The right choice depends on whether the application actually exposes the grease to the extra load, heat, or water that justifies the higher-spec product. In lower-duty environments, a lithium complex grease can deliver adequate performance at a lower cost per kilogram, and its lower cost is often the deciding factor in general-purpose manufacturing lines.

Market Context and Raw Material Pressures

Buyer decisions today are also shaped by supply-side trends. Lithium prices surged 80% to 120% between 2021 and 2023, a volatility that pushed many lubricant manufacturers and buyers to examine polyurea and calcium sulfonate alternatives for high-temperature applications. This is one reason why calcium sulfonate production grew 7.7% globally in 2024, according to industry data from the Society of Tribologists and Lubrication Engineers.

The broader high-temperature grease market is expanding as well. Estimates place the global market at roughly USD 28.04 billion in 2025, with Asia Pacific holding a 38% share, largely due to automotive manufacturing concentration in the region. For importers and distributors, this growth signals stable demand, but the selection risk remains at the product-specification level, where the grease matches the real operating conditions of the customer's equipment.

Decision Framework for Buyers

Step 1: Define the maximum operating temperature

• Below 180°C: lithium complex grease (XG/HP, XG/HP-R) is sufficient for most bearing and automotive needs.
• Up to 200°C: polyurea grease (XG/U series) extends the upper range.
• Above 200°C to 250°C: calcium sulfonate complex grease (XG/C4, XG/C5) is the only family in this dataset that reaches that window.

Step 2: Assess the load condition

• If the machine experiences shock loads or extreme pressure, compare the PD value against the application requirement.
• Published PD values are 315 kgf for lithium complex and 500 kgf for calcium sulfonate complex.
• For polyurea, PD data is not published in the available product spec, so EP additive content should be verified with the manufacturer.

Step 3: Evaluate the environment

• Water splash or humidity: prioritize calcium sulfonate complex grease for its water and rust resistance.
• Continuous heat with limited shock load: polyurea grease's oxidation resistance offers a practical solution.
• Mixed metallurgy conditions with centralized lubrication: lithium complex and calcium sulfonate products have documented compatibility with centralized grease systems in steel plant environments.

Step 4: Check the manufacturer's certifications

• IATF 16949 certification is relevant for buyers in automotive supply chains.
• ISO 9001, ISO 14001, and ISO 45001 certifications provide a baseline quality, environmental, and safety framework.

Supplier Verification Notes

XINGANG operates as a manufacturer with an annual production capacity of 45,000 tons across its lubricants and grease operations, and its production facility covers 16,000 m². The company has served large steel enterprises over a long period; documented history includes 30 years of cooperation with large steel plants, metallurgical enterprises, and industrial equipment manufacturers in China.

For overseas buyers, XINGANG's export markets include Türkiye, South Africa, Russia, Southeast Asia, and Peru, with additional export markets such as India, Pakistan, Vietnam, and Malaysia noted in its capability profile. Its sales and support contacts are published through the company website at www.china-lubes.com and a downloadable company profile is available for procurement review.

FAQ

For buyers seeking a complete manufacturing and quality overview, the company profile is publicly available for download.
Download the XINGANG company profile (PDF)