Product Catalog
Request Information
Castrol Hysol® 21 BF (previously called Product™ WA 0073 6510BF) is a high performance semi-synthetic metalworking fluid formulated without chlorine, formaldehyde releasing agent and boron. It contains an additive package that provides excellent corrosion protection to machine tools and parts. It also provides excellent product stability which helps to lower the overall operational costs. Hysol 21 BF is suitable for large central systems and single sump machines.
Unit of Measure

Package Type

 N/A Tote

Specific Gravity at 60 Degree Fahrenheit (ºF) (15.6 Degree Celsius (ºC)) Temperature

 N/A 0.98 to 1.01

Potential of Hydrogen (pH) at 20:1 Ratio

 N/A 9.2 to 9.8 pH

BRIX Factor

 N/A 1.6

Applications

 N/A Hysol 21 BF is especially designed for machining of cast iron and low-medium alloyed steel.

Suggested Applications
Grinding: Cast iron, low-medium alloyed steel, high alloyed stainless steel
Milling, Turning: Cast iron, low-medium alloyed steel
Drilling: Cast iron, low-medium alloyed steel
Reaming, Tapping: Cast iron, low-medium alloyed steel
Broaching: Cast iron, low-medium alloyed steel

Possible Applications
Milling, Turning: High alloyed stainless steel

Broaching

 N/A 6 to 10 %

Drilling

 N/A 6 to 8 %

General Machining

 N/A 6 to 10 %

Grinding

 N/A 4 to 6 %

Reaming

 N/A 6 to 10 %

Water Range

 N/A CaCO3: 50-600 ppm

Features and Benefits

 N/A
  • Boron free to meet waste treatment requirements
  • Chlorine, formaldehyde releasing agent and nitrite free which may help you to fulfill aspects of legislative and waste treatment requirements that specify that these chemicals are excluded
  • Extended fluid life can help to reduce maintenance and downtime
  • Low foam in recommended water conditions (see details below)
  • Excellent anti-corrosion properties to protect machine tools and parts
  • Good wetting properties can help to reduce coolant drag out and help deliver cleaner machine tools and components
  • Contains amines
  • Boron free

Storage and Handling

 N/A To avoid product deterioration always keep the container/drum tightly sealed. Store the product in a cool, dry place away from direct sunlight. Prevent exposure to frost and avoid water ingress. For optimum product stability, it is preferable to store the product indoors between 5°C and 45 °C / 41°F and 113°F.