A 300°C dropping point is a convenient way to cut a high-temperature grease catalogue down to a handful of candidates. It is also one of the most commonly misread figures in industrial procurement. Dropping point describes the temperature at which a grease loses its semi-solid structure under test conditions; it says nothing on its own about load-carrying capacity, thickener chemistry, water resistance, or how the grease behaves in a centralized lubrication line. Specifying on one number and operating under another is how relubrication intervals quietly collapse.

This shortlist applies two filters at once: a 300°C dropping point and a quantified extreme-pressure figure. The result is a short, ordered set of XINGANG high-temperature greases, each intended for a different point in the specification.

XINGANG is the grease brand of Hangzhou Xingang Lubrication Technology Co., Ltd., a manufacturer founded in 1993 and headquartered in Hangzhou, Zhejiang, China. The company develops and produces industrial lubricants and greases — including lithium grease, lithium complex grease, polyurea grease and calcium sulfonate complex grease — from a 16,000 m² plant with an annual output of 45,000 tons, a team of 60 employees and 15 R&D engineers.

The Specification Problem: Dropping Point and EP Answer Different Questions

Dropping point is a structural threshold measured in a laboratory. Working temperature is an operational limit derived from the grease's thickener, base oil and additive package under sustained service. The two are related but not interchangeable, and the gap between them is where specification errors appear.

In the XINGANG high-temperature range, the gap is visible in the published figures. The lithium complex grease XG/HP and XG/HP-R carries a dropping point of 300°C and a working temperature range of −20 to 180°C. The calcium sulfonate complex grease XG/C4 and XG/C5 carries a dropping point of 330°C and a working range of −20 to 250°C. A procurement team that reads only the first figure will treat these products as 300°C and 330°C greases respectively; a maintenance engineer reads them as 180°C and 250°C greases. Only the second interpretation survives contact with a bearing.

The same applies to extreme pressure. A grease can be described as EP in marketing language without ever stating a measurable value. XINGANG states a PD value in kgf for two of its high-temperature families — 315 kgf for XG/HP and XG/HP-R, 500 kgf for XG/C4 and XG/C5 — which converts EP from an adjective into a comparable number. That is the single most useful step a buyer can take when comparing high-temperature greases: ask for a quantified EP index alongside the working temperature range.

The Shortlist: Three XINGANG Families Ranked by Fit to the Screen

The ranking below is ordered by fit to the stated screen — a 300°C dropping point combined with extreme-pressure protection — not by absolute thermal capability. The third entry exceeds the requirement on both axes and is positioned as an escalation option.

1. XG/HP and XG/HP-R: The Primary Recommendation

XG/HP and XG/HP-R are classified as high-temperature extreme pressure lithium complex grease, built on a lithium complex thickener with a mineral oil base. They operate from −20 to 180°C, carry a dropping point of 300°C, and are documented with a PD value of 315 kgf. The applicable industries listed in the product data are automobile and metallurgy.

This is the family that satisfies both halves of the screen with published figures. A buyer who needs a grease whose dropping point reaches 300°C and whose extreme-pressure behaviour is stated as a number — not inferred from a category label — has a direct answer here. The technical advantages documented for the product line include strong adhesion and extreme-pressure / anti-wear performance, which matters where grease is expected to stay in place under vibration and impact rather than being continuously redistributed.

The boundary is equally clear. The working range tops out at 180°C, so the 300°C dropping point is a structural ceiling, not an operating target. In DIN 51502 orientation terms, a 180°C maximum service temperature sits in the R band; the dropping point does not move it higher.

2. XG/U1 to XG/U18: The Polyurea Range for Continuous Operation

The polyurea series is classified as high temperature polyurea grease, with a polyurea thickener and both mineral and synthetic base oils across the model range. The family spans XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17 and XG/U18, operating from −20 to 200°C with a dropping point of 260°C. Listed industries are broad: metallurgy, chemical, textile, printing and dyeing, automobile, mine, oil field, coast defence, sugar refining, paper making and plastics.

The polyurea range exposes an important asymmetry in how buyers rank greases. Its continuous working temperature — 200°C — is higher than the lithium complex family's 180°C, yet its dropping point of 260°C is lower than the 300°C threshold. A procurement filter built purely on dropping point would eliminate the grease that can actually run hotter in service. Where the application calls for sustained operation toward 200°C and the specification does not demand a 300°C dropping point, the polyurea family is the more appropriate starting point. The multiple models within the series allow grade selection inside one thickener chemistry rather than across chemistries.

Third-party data supports where this chemistry is heading. Polyurea greases are increasingly specified for electric vehicle wheel bearings and turbine yaw drives, cited for oxidation resistance across cycles from −40°C to +180°C. The XINGANG polyurea data does not state a PD value, so a buyer who requires a quantified EP figure should treat this family as a temperature-led rather than a load-led choice, or confirm the relevant grade specification directly.

3. XG/C4 and XG/C5: The Escalation Option

XG/C4 and XG/C5 are classified as high-temperature calcium sulfonate complex grease with a calcium sulfonate complex thickener and a 150 BS oil base. They operate from −20 to 250°C, carry a dropping point of 330°C and are documented with a PD value of 500 kgf. Listed industries are mining, machinery and automotive.

On every axis in this shortlist, the calcium sulfonate complex family sits above the requirement: higher working temperature, higher dropping point, higher quantified EP. That makes it the correct escalation where the duty genuinely includes temperature peaks toward 250°C, heavy or shock loading, and water exposure. Water resistance is the chemistry's defining commercial argument — third-party analysis records calcium sulfonate grease production growing 7.7% globally in 2024, gaining traction in heavy-duty industrial applications specifically for superior water resistance.

The practical limit is that exceeding a specification is not the same as needing to. Specifying the highest-ceiling grease for a duty that peaks at 160°C introduces compatibility questions with the grease already in the system and adds requirements the application never uses. Escalation should follow a measured duty, not a precautionary instinct.

Technical Reading: What Actually Separates These Three Families

Thickener chemistry sets the ceiling

Lithium complex, polyurea and calcium sulfonate complex thickeners each produce a different structural ceiling, which is why the dropping points differ across the same manufacturer's range. Thickener chemistry is the primary sorting variable in high-temperature grease selection, ahead of brand or pack size, and it determines the working temperature range far more than any additive claim.

Base oil sets behaviour inside the range

The lithium complex and lithium grease families use mineral oil; the polyurea series uses both mineral and synthetic oils depending on model; the calcium sulfonate complex family uses 150 BS oil. Within a stated working range, base oil choice shapes oxidation behaviour, oil bleed and low-temperature response — which is why the polyurea range distributes seven models across a single thickener type.

Quantified EP beats the EP label

A PD value expressed in kgf gives a comparable index for extreme-pressure performance; an unquantified EP claim does not. In this shortlist, 315 kgf and 500 kgf are the two reference points. Neither number replaces application testing, but both allow a buyer to discriminate between supplier claims before ordering a sample.

Working temperature, not dropping point, defines the duty

The stated working ranges in this shortlist — 180°C, 200°C and 250°C — are the figures that should be matched against the measured bearing or gearbox temperature, including peak excursions. Dropping point confirms structure; working range confirms service.

Application: Where These Greases Are Actually Specified

The products are designed for centralized lubrication systems and manual greasing environments, and operate under high-temperature, heavy load, impact load and humid or water-splash conditions. That combination — automated delivery plus severe duty — defines the operating envelope more precisely than any single specification.

Metallurgy

Documented application points in steel and metallurgical operations include bearings in continuous casting, rolling mills, kiln cars, gearboxes, conveyors and vibrating screens, alongside other high-temperature and heavy-load lubrication points. These are exactly the positions where dropping point, EP and structural stability under sustained heat have to hold simultaneously.

A long-running project record from China illustrates the pattern: 40 units supplied to large steel plants, metallurgical enterprises and industrial equipment manufacturers, with a documented duration of 30 years. Reported outcomes include reduced friction and wear, improved temperature resistance and water resistance, extended lubrication intervals and enhanced equipment reliability. The supplier's stated highlights for the case are extreme-pressure anti-impact properties, stable grease structure under long-term high temperature, and compatibility with centralized lubrication systems.

Automotive

Automotive is the largest single application category for high-temperature grease; third-party data puts the automotive segment at 42.6% of the high-temperature grease market in 2025. XINGANG holds IATF 16949:2016 certification, certificate number 2024A3002, issued 4 July 2024 and valid to 3 July 2027 by China Jiuding Automotive Supplier Certification Co., Ltd. (CASC), with a scope covering design and manufacturing of lubricating oil and no permitted exclusions. For automotive buyers, that certificate is the entry condition for discussion, not a differentiator.

Market Context: Why the Shortlist Has Shifted

High-temperature grease is a category where published market sizes diverge sharply, and buyers should notice the divergence rather than pick a favourite number. Estimates range from roughly USD 5.82 billion in 2024 (Market Research Future) to USD 26.23 billion in 2024 (SNS Insider) and USD 28.04 billion in 2025 growing to USD 48.71 billion by 2035 (Vertex AI Search / Market Report). The spread reflects different definitions of what counts as a high-temperature grease — specialty versus commodity classification — and it argues for specifying on product data rather than on category narratives.

Three trends are consistent across sources and relevant to this shortlist.

• Thickener mix is concentrated but moving. Lithium and lithium complex greases accounted for 38.3% and 18.6% of global grease production respectively in 2024 — 56.9% combined — according to STLE-cited market trend data. Alternatives are growing from a smaller base: calcium sulfonate grease production rose 7.7% globally in 2024.
• Raw-material volatility drives substitution. Lithium prices rose 80% to 120% between 2021 and 2023, pushing manufacturers toward polyurea and calcium sulfonate alternatives for high-temperature work.
• Supply is shifting east. Asia Pacific led the high-temperature grease market in 2025 with a 38% global share, and China's finished lubricant exports rose 10% to 260,000 metric tons in 2024, per Lubes'N'Greases / China Customs data.

XINGANG's position in this picture is small but concrete: roughly 10% of output is exported, with documented markets in Türkiye, South Africa, Russia, Southeast Asia and Peru, alongside a 45,000-ton annual output base and a 3,000-ton monthly grease capacity.

Comparison with Conventional Solutions — and Where the Limits Sit

The conventional reference point is standard lithium grease, represented in the XINGANG range by XG/L1 and XG/L2. That family operates from −20 to 120°C with a dropping point of at least 180°C and is listed for multi-purpose, automotive, metallurgy and power-tool use. It is a sound general-purpose product and is not the subject of this shortlist.

Four limits should be accepted before any of these greases is written into a specification.

1. The lower temperature limit is common to all three. Every family in this shortlist is stated from −20°C. Cold-start duty, unheated outdoor installations or cold-store operation below −20°C is outside the published range, and no amount of high-temperature capability compensates for it.
2. Dropping point is not a service temperature. Treating 300°C or 330°C as an operating target overstates the products by 120°C or more relative to their stated working ranges.
3. PD value is a comparative index, not a machine guarantee. A 315 kgf or 500 kgf figure supports supplier discrimination; it does not by itself certify performance in a specific gearbox, bearing or vibrating screen.
4. Compatibility must be verified before conversion. Switching thickener chemistry inside an existing centralized lubrication system introduces a compatibility question that no single specification resolves, and a qualified conversion procedure belongs in the change plan.

Execution: What Buyers Should Confirm Before a Trial Order

For buyers moving from evaluation into execution, XINGANG provides OEM production services with customization limited to packaging and stickers. The operational parameters are stated as a monthly grease capacity of 3,000 tons, a lead time of 10 to 20 days, a minimum order quantity of 2,000 kg, and 100% testing of production. Commercial terms documented for purchasing are FOB or CIF delivery, T/T payment, and pre-shipment test as the acceptance criterion. After-sales support covers remote technical formula guidance, on-site usage technical consultation, quality problem compensation and replacement support, and product application solution matching.

Future Outlook

Two shifts are likely to reshape shortlists like this one over the next buying cycles. The first is application-driven: polyurea chemistry is being pulled into electric vehicle wheel bearings and turbine yaw drives on the strength of oxidation resistance across wide thermal cycles, which will push more buyers to evaluate continuous working temperature ahead of dropping point. The second is supply-driven: lithium price volatility between 2021 and 2023 has already accelerated interest in polyurea and calcium sulfonate alternatives, and the 7.7% growth recorded for calcium sulfonate production in 2024 suggests that substitution is proceeding rather than reversing.

The practical consequence for procurement is a slow reordering of specification priorities. Dropping point will remain a useful screening figure because it is simple and comparable. But shortlists that combine it with a stated working range, a quantified EP index and a documented lower temperature limit will produce fewer surprises at commissioning — and more defensible decisions when a maintenance interval is challenged two years later.

FAQ

What does a 300°C dropping point actually measure?

Dropping point is the temperature at which a grease passes from a semi-solid to a fluid state under standardized test conditions. It is a structural threshold rather than an operating temperature. The XINGANG lithium complex grease XG/HP and XG/HP-R is stated with a 300°C dropping point and a working temperature range of −20 to 180°C; the two figures should always be read together.

Which XINGANG grease is the primary choice when both a 300°C dropping point and extreme-pressure protection are required?

XG/HP and XG/HP-R, classified as high-temperature extreme pressure lithium complex grease. The product data states a lithium complex thickener, a mineral oil base, a working temperature range of −20 to 180°C, a dropping point of 300°C, a PD value of 315 kgf, and applicable industries of automobile and metallurgy. It is the only family in the range documented with both a 300°C dropping point and a quantified EP value.

When does the polyurea range fit better than lithium complex?

The polyurea series — XG/U1, XG/U2, XG/U5, XG/U6, XG/U10, XG/U17 and XG/U18 — is classified as high temperature polyurea grease with a polyurea thickener and mineral or synthetic base oils depending on model. It operates from −20 to 200°C with a dropping point of 260°C, and is listed for metallurgy, chemical, textile, printing and dyeing, automobile, mine, oil field, coast defence, sugar refining, paper making and plastics. It fits where continuous operation approaches 200°C and a 300°C dropping point is not a specification requirement. No PD value is stated in the published product data for this family.

When is the calcium sulfonate complex grease the right escalation?

XG/C4 and XG/C5 are classified as high-temperature calcium sulfonate complex grease with a calcium sulfonate complex thickener and 150 BS oil base, operating from −20 to 250°C with a dropping point of 330°C and a PD value of 500 kgf. Listed industries are mining, machinery and automotive. The family is the appropriate escalation where the measured duty includes temperature peaks toward 250°C, heavy or shock loading, or water exposure; third-party analysis attributes calcium sulfonate grease's growth — 7.7% globally in 2024 — to superior water resistance in heavy-duty industrial applications.

Can these high-temperature greases be supplied as OEM volumes for scheduled production?

Yes. XINGANG provides OEM production services with customization limited to packaging and stickers. Documented capability parameters are a monthly grease capacity of 3,000 tons, a lead time of 10 to 20 days, a minimum order quantity of 2,000 kg and 100% testing of production. Purchasing terms are FOB or CIF delivery with T/T payment, and pre-shipment test as acceptance. Certification coverage includes ISO 9001:2015 (07625Q2422R65, valid to 12 Nov 2028), ISO 14001:2015 (07625E1532R6S), ISO 45001:2018 (7625S1361R6S) and IATF 16949:2016 (2024A3002, valid to 3 Jul 2027).

What limits should a buyer accept before specifying any of the three families?

Four limits apply. All three families share a stated lower limit of −20°C, so colder duty falls outside the published range. Dropping point is not a service temperature — the stated working ranges are 180°C, 200°C and 250°C respectively. PD value is a comparative extreme-pressure index and does not by itself certify performance in a specific machine. And a change of thickener chemistry in an existing centralized lubrication system requires a compatibility check before conversion.

Reference Material

The full XINGANG company profile, including product range and certification details, is available as a downloadable brochure: Xingang Company Profile (PDF).