Fire-resistant Hydraulic Oil KR-EFU68 | Fire Resistance Industrial Circulating Oils |

Gear-specific Quenching Oil KR498C

Reduce changes in gear profile, tooth alignment, and flatness during the quenching and cooling process.

Category: Quenching Oil, Specialized Quenching Oil

Product Details

Advantages

● Tailored to the specific requirements of gears, it features a more optimized cooling rate distribution, with a short vapor film stage, faster high-temperature cooling rate, and slower low-temperature cooling rate.
● Effectively controls gear quenching distortion while achieving high and uniform surface hardness with sufficient hardening depth;
● Provides excellent surface finish after quenching, making cleaning and shot blasting easier;
● Exhibits outstanding thermal oxidation stability, maintaining long-term stable cooling characteristics with extended service life.

Technical Specifications

Model	KR498C
Water Content	≤ 0.03%
Flash Point	(open, ℃) ≥ 245
Max Cooling Rate	(℃/s, 60℃) Typical value: 80
Kinematic Viscosity	(40℃) mm²/s 95
Typical Applications	Suitable for small and miniature gears with stringent requirements for distortion control.

Storage Conditions

Item	Requirements
Storage Temperature	5–40°C. Indoor storage is recommended. Protect from freezing, as freezing may damage the polymer system.
Packaging & Container Requirements	Packaged in 200 L plastic drums with a net weight of 200 kg per drum; 25 kg plastic pails or 1,000 kg intermediate bulk containers (IBCs) may also be used.
Shelf Life	2 years. After expiry, the product may only be used after it has been retested and confirmed to meet specifications.
Key Properties (KR9988)	Appearance: light yellow to pale red viscous liquid; pH (5% solution): 9.5–10.5; kinematic viscosity (10% solution at 40°C): 3.19 mm²/s.
Precautions	Nonflammable and presents no fire hazard; nevertheless, keep the container tightly sealed. If stored outdoors, place the drum horizontally to prevent water, dust, and other contaminants from entering. Retighten the cap immediately after dispensing. Check the concentration with a refractometer before use. PAG-containing products exhibit reverse solubility; polymer separation at elevated temperatures is normal, and the product can be restored by cooling and stirring.