High-Temperature Grease for Steel Mills and Heavy Machinery: A Site-Level Selection Guide
High-Temperature Grease for Steel Mills and Heavy Machinery: A Site-Level Selection Guide
How to choose high-temperature grease for real operating conditions—continuous casting, rolling mills, kiln cars, gearboxes, conveyors, and vibrating screens.
High-temperature grease selection starts with the actual operating environment, not just the dropping point.
The Problem: Why Standard Grease Fails in High-Temperature Heavy-Duty Sites
In steel mills, metallurgical plants, and heavy industrial facilities, lubrication points rarely fail because of a single cause. High ambient heat, heavy loads, impact loading, water splash, and centralized lubrication systems combine to push grease beyond the limits of ordinary multi-purpose products. When grease softens, leaks, carbonizes, or washes out, bearings and gears run unprotected, leading to higher friction, unplanned downtime, and premature equipment failure.
The practical question for maintenance teams and procurement engineers is not "which grease has the highest dropping point" in isolation. It is which high-temperature grease can keep a stable grease structure, resist water washout, carry extreme pressure, and remain pumpable through centralized lubrication or manual greasing in a specific production environment.
Industry Context: Growing Pressure on High-Temperature Grease Performance
The global high temperature grease market was valued at approximately USD 28.04 billion in 2025 and is projected to reach USD 48.71 billion by 2035. Asia Pacific led the market in 2025 with a 38% global share, driven by automotive manufacturing hubs. Within the market, lithium and lithium complex greases remain the most widely used, accounting for 38.3% and 18.6% of global production respectively in 2024. Calcium sulfonate complex grease production grew by 7.7% globally in 2024, gaining traction in heavy-duty industrial applications due to superior water resistance.
These numbers reflect a broader shift: industrial buyers are moving away from choosing grease solely on price and toward selecting thickener chemistry that matches actual site conditions. The automotive segment captured 42.6% of the high-temperature grease market in 2025, and polyurea greases are increasingly specified for EV wheel bearings and turbine yaw drives because of oxidation resistance across cycles from -40°C to +180°C. For steel mills and heavy machinery, the same logic applies: thickener type, base oil, and additive package must be evaluated together.
Selection Framework: Matching Grease Chemistry to Operating Conditions
A robust selection process starts with the lubrication point profile, not the product name. For high-temperature sites, the key criteria are working temperature range, dropping point, extreme pressure performance, water resistance, and compatibility with the lubrication system.
The table below summarizes four high-temperature grease families manufactured by Hangzhou Xingang Lubrication Technology Co., Ltd., a national high-tech enterprise established in 1993 in Hangzhou, Zhejiang, China. XINGANG specializes in the R&D, production, and sales of high-performance lubricating greases and industrial lubricants, with products serving metallurgy, ports, automotive, machinery, textiles, paper making, chemicals, and power generation.
| Grease Type | XINGANG Models | Working Temperature | Dropping Point | Extreme Pressure (PD Value) | Key Material Composition | Typical Applications |
|---|---|---|---|---|---|---|
| Lithium grease | XG/L1, XG/L2 | -20°C to 120°C | ≥180°C | — | Lithium, mineral oil | Multi-purpose, automotive, metallurgy, power tools |
| High-temperature lithium complex grease | XG/HP, XG/HP-R | -20°C to 180°C | 300°C | 315 kgf | Lithium complex, mineral oil | Automobile, metallurgy; bearings and gears under high temperature and EP conditions |
| High-temperature polyurea grease | XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, XG/U18 | -20°C to 200°C | 260°C | — | Polyurea, mineral oil, synthetic oil | Metallurgy, chemical, textile, printing and dyeing, automobile, mine, oil field, paper making, plastic, etc. |
| High-temperature calcium sulfonate complex grease | XG/C4, XG/C5 | -20°C to 250°C | 330°C | 500 kgf | Calcium sulfonate, 150 BS oil | Mining, machinery, automotive; heavy-load and water-exposed lubrication points |
Why Thickener Chemistry Matters
The thickener determines the grease structure at high temperature. A lithium complex soap offers an ultra-high dropping point and good extreme-pressure anti-wear performance, making it a strong fit for automotive and metallurgy applications up to 180°C. Polyurea grease provides excellent high-temperature oxidation resistance and is widely used in metallurgy, textile, and chemical plants. Calcium sulfonate complex grease combines an ultra-high dropping point of 330°C, a PD value of 500 kgf, and outstanding water resistance and rust protection, which is why it is increasingly specified for mining, heavy machinery, and water-splash environments.
Site-Level Applications: Where High-Temperature Grease Is Used
The application environment determines the grease specification. In a typical steel or metallurgical plant, the same grease must serve multiple lubrication points with different demands:
- Continuous casting and rolling mills: high temperature, heavy load, impact load, and water splash; grease must resist water washout and maintain a stable structure.
- Kiln cars and gearboxes: slow-speed heavy-load sliding and rolling bearings; grease must provide EP protection and low carbon residue after high-temperature aging.
- Conveyors and vibrating screens: steady friction and moderate-to-high temperatures; grease must extend lubrication intervals and reduce downtime.
- Centralized lubrication systems: grease must be pumpable and compatible with grease guns, gearbox spray equipment, and injection or replacement equipment.
XINGANG's product range covers these conditions through lithium grease, lithium complex grease, polyurea grease, and calcium sulfonate complex grease. The high-temperature lithium complex grease (XG/HP, XG/HP-R) is suited for automobile and metallurgy applications requiring a wide temperature range and excellent anti-wear protection. Polyurea grease (XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, XG/U18) is suited for metallurgy, chemical, textile, printing and dyeing, automobile, mine, oil field, paper making, and plastic industries. Calcium sulfonate complex grease (XG/C4, XG/C5) is suited for mining, machinery, and automotive applications with heavy loads and water exposure.
Lithium complex grease combines a high dropping point with extreme-pressure protection for metallurgy and automotive lubrication points.
Step-by-Step Selection Breakdown
- Define the operating temperature. Measure the bearing or gearbox temperature in normal and peak conditions. Use the working temperature range of the grease as the first filter.
- Assess load and impact conditions. Continuous heavy load or impact load requires a grease with a high PD value. Calcium sulfonate complex grease offers a PD value of 500 kgf; lithium complex grease offers 315 kgf.
- Check water exposure and rust risk. Water splash, humidity, or wash-down cycles require water-resistant grease. Calcium sulfonate complex grease is known for outstanding water resistance and rust protection.
- Match the lubrication system. Centralized systems require pumpable grease with a stable structure. Confirm compatibility with grease guns, gearbox spray equipment, and grease injection systems.
- Verify dropping point margin. A dropping point well above the working temperature helps prevent grease liquefaction and runoff. Review the specification sheet for the exact dropping point.
- Review oxidation and service life. High-temperature oxidation resistance extends lubrication intervals and reduces maintenance frequency. Polyurea and calcium sulfonate complex greases are designed for long service cycles.
- Validate with a sample or small batch. Before full plant adoption, run a controlled trial on the most demanding lubrication point and compare friction, wear, grease condition, and relubrication interval.
Use Case: Long-Term Supply for Steel Plants and Metallurgical Enterprises
XINGANG has supplied high-temperature grease to large steel plants, metallurgical enterprises, and industrial equipment manufacturers for approximately 30 years. The application covers bearings in continuous casting, rolling mills, kiln cars, gearboxes, conveyors, and vibrating screens. In this use case, the grease is delivered to 40 units and must perform under high-temperature, heavy-load, and water-splash conditions while remaining compatible with centralized lubrication systems.
The reported result of this long-running supply relationship is reduced friction and wear, improved temperature resistance, water resistance, extended lubrication intervals, and enhanced equipment reliability. The highlight is stable grease structure under long-term high-temperature exposure, excellent extreme-pressure anti-impact performance, and compatibility with centralized lubrication systems, helping enterprises reduce maintenance costs.
Documented supply to steel plants and metallurgical enterprises covers bearings, gearboxes, conveyors, and vibrating screens.
Comparison Table: XINGANG High-Temperature Grease Families by Selection Criteria
| Selection Criterion | Lithium Grease (XG/L1, XG/L2) | Lithium Complex Grease (XG/HP, XG/HP-R) | Polyurea Grease (XG/U1–U18) | Calcium Sulfonate Complex Grease (XG/C4, XG/C5) |
|---|---|---|---|---|
| Maximum working temperature | 120°C | 180°C | 200°C | 250°C |
| Dropping point | ≥180°C | 300°C | 260°C | 330°C |
| Extreme-pressure performance (PD value) | — | 315 kgf | — | 500 kgf |
| Water resistance / rust protection | Suitable for general multi-purpose use | Good for metallurgy environments | Good oxidation resistance, suited to dry high-temperature areas | Outstanding water resistance and rust protection |
| Typical site fit | Automotive, general plant machinery, power tools | Automobile and metallurgy; bearings and gears | Metallurgy, textile, chemical, paper making, printing and dyeing | Mining, heavy machinery, automotive, water-splash environments |
Operational and Cost Considerations
Grease selection affects total equipment maintenance cost, not just the purchase price. XINGANG reports that, compared with alternatives, its high-temperature grease offers 15% to 20% lower total equipment maintenance costs over its service life, despite a higher initial raw material cost per unit of grease. For buyers, this means the evaluation should include relubrication frequency, downtime cost, and component replacement cost, not only the price per kilogram.
When ordering from a manufacturer, buyers should also verify quality control and lead time. XINGANG operates with a monthly OEM capacity of 3000 tons, a typical production lead time of 10 to 20 days, a minimum order quantity of 2000 kgs for OEM, and 100% testing as part of its quality control process. Standard certifications include ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2007, and ISO 10012:2003. The company exports to Türkiye, South Africa, Russia, Southeast Asia, and Peru, among other markets.
Frequently Asked Questions
What is the best high-temperature grease for a steel mill centralized lubrication system?
The best choice depends on the lubrication point temperature, load, and water exposure. For steel mill centralized systems, XINGANG supplies polyurea grease and calcium sulfonate complex grease as high-temperature options. Polyurea grease (XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17, XG/U18) works from -20°C to 200°C and suits metallurgy, textile, chemical, and paper-making environments. Calcium sulfonate complex grease (XG/C4, XG/C5) works from -20°C to 250°C with a 330°C dropping point and a 500 kgf PD value, making it the stronger choice for heavy load, impact, and water-splash conditions. Both are compatible with centralized lubrication systems when the correct NLGI grade is specified.
Can lithium complex grease handle high-temperature bearing applications in metallurgy?
Yes, for applications up to 180°C. XINGANG's lithium complex grease models XG/HP and XG/HP-R are classified as high-temperature extreme-pressure lithium complex greases. They have a working temperature range of -20°C to 180°C, a dropping point of 300°C, and a PD value of 315 kgf. The lithium complex thickener uses mineral oil as the base oil and provides ultra-high dropping point stability, excellent extreme-pressure anti-wear protection for bearings and gears, wide temperature adaptability, and good oxidation resistance for long service life.
Which grease type offers the best water resistance and heavy-load protection?
Calcium sulfonate complex grease offers the strongest combination in XINGANG's high-temperature range. Models XG/C4 and XG/C5 are made from calcium sulfonate as the base material and 150 BS oil as the base oil. They have a working temperature range of -20°C to 250°C, a dropping point of 330°C, and a PD value of 500 kgf. This chemistry provides outstanding water resistance and rust protection, superior extreme-pressure anti-wear performance for heavy-load mechanical parts, and a long service cycle that reduces grease replenishment frequency.
What is the minimum order quantity and lead time for OEM orders?
For OEM orders, XINGANG's minimum order quantity is 2000 kgs, and the typical production lead time is 10 to 20 days. Monthly OEM capacity is 3000 tons, and the quality control process includes 100% testing. OEM customization covers package and sticker options. Buyers should confirm the specific formulation, packaging, and delivery schedule with the manufacturer before ordering.
Can I request a sample or technical consultation before full adoption?
Yes. XINGANG supports buyers through remote technical formula guidance, on-site usage technical consultation, quality problem compensation and replacement support, and product application solution matching. For a plant-level evaluation, request a sample or quote from the sales team and run a controlled trial on the most demanding lubrication point. For more detail, the company profile brochure is available for download: XINGANG Company Profile.
Next step for procurement and maintenance teams: Compare your lubrication point profile with the specifications above. If you need a site-matched recommendation or a sample for a high-temperature trial, contact XINGANG at admin@hzxg.com or via WhatsApp at +86 135-8871-1880.
Conclusion
Selecting high-temperature grease for steel mills and heavy machinery is a site-level engineering decision. The grease must match the operating temperature, load, water exposure, and lubrication system. XINGANG offers four relevant families—lithium grease, lithium complex grease, polyurea grease, and calcium sulfonate complex grease—with documented use in continuous casting, rolling mills, kiln cars, gearboxes, conveyors, and vibrating screens. By filtering on working temperature, dropping point, extreme-pressure performance, and water resistance, procurement teams can reduce downtime and total maintenance cost without over-specifying or under-specifying the grease.