Molykote HSC Plus Paste

MOLYKOTE® HSC Plus Paste is a solid lubricant paste with no intentional lead or nickel. It consists of mineral oil, thickening agents, solid lubricants and lead-free metal powder. It can be used from −30 to 1100 °C and enables non-destructive dismantling even after long use at high temperatures. It has high load-carrying capacity, and its stated coefficient of friction allows defined pre-stressing forces to be achieved in bolted joints. It gives good corrosion protection and has good electrical conductivity. It is used for metal/metal combinations and bolted joints subjected to high temperatures, at low speed lubrication points exposed to high temperatures and corrosive effects that require a low and constant coefficient of friction, and as a contact lubricant for electrically conducting components. It has been used on stud bolts in industrial turbines, stud bolts in diesel engine turbochargers and flanged connections in chemical and petrochemical plants.

Typical Properties

• Copper coloured; unworked penetration 250–280 mm/10; density (20 °C) 1.4 g/mL; drop point none
• Service temperature −30 to 1100 °C (temperature limit of the solid lubricants)
• Four-ball weld load 4800 N; wear scar 0.6 mm at 400 N, 1.1 mm at 800 N; Almen-Wieland OK load 20,000 N
• Coefficient of friction (M12, 8.8, blackened surface): thread 0.14, head 0.09
• Initial break-away torque 120 N·m (M12, 56 N·m tightening torque, 21 hours at 540 °C)

Use and Storage

• If possible, clean threads and used bolts with a wire brush; spread an adequate amount of paste on the contact areas to obtain a good seal; an excess is not harmful
• Do not mix with greases or oils so as not to alter its properties; the spray can is advisable for larger areas
• 60 months from date of production at or below 20 °C in the original unopened containers; aerosol 24 months at 5–35 °C