How do you prevent stainless steel from galling?

What Can I Do to Prevent Galling?

1. Slow Down Installation Speed.
2. Don’t Use Bolts to Pull Joints Together.
3. Use a Lubricant.
4. Avoid Damaged or Dirty Threads.
5. Use Extra Care With Lock Nuts.
6. If a Fastener Begins to Bind: STOP.

Is stainless steel prone to galling?

Stainless steel fasteners are particularly susceptible to thread galling, although it also occurs in other alloys that self-generate an oxide surface film, such as aluminum and titanium.

How can you prevent galling defects due to the process of redrawing?

Measures to Avoid Galling

1. Slow down the installation process.
2. Avoid bolts to bring joints together.
3. Apply a lubricant.
4. Do not use damaged, dented, or dirty threads.
5. Stop immediately if a fastener starts to bind.

How do you get rid of galling?

Proper anti-seize compounds are the best way to prevent galling between mating surfaces. A typical anti-seize compound contains about 60-70% solids. At high temperatures (about 400 degrees F), the remaining oil burns off, leaving the solids to protect from galling.

What is the best lubricant for stainless steel?

All stainless steel threads should be lubricated – ideally with a Nickel based lubricant such as Loctite 771 or PTFE based lubricant such as Tef Gel designed for use with stainless steel fasteners. A Lanolin based lubricant such as Lanotec is also suitable and also helps prevent corrosion.

How do you stop aluminum galling?

How to Prevent Galling?

1. Select a metal that is not very prone to it, such as a hardened tool steel.
2. Reduce the amount of friction by using a lubricant.
3. Reduce the amount of friction in threaded fastener applications by selecting a coarser thread.

What causes stainless galling?

Friction causes galling, so any form of interference or heat build-up can cause galling. Common triggers are debris in the thread, reusing overtightened hardware, and threading soft materials together such as stainless steel. Another common trigger is damaged threads due to shipping.

What causes Stainless to seize?

While the fastener is being tightened, pressure builds between the thread surfaces and breaks down the protective oxide coatings. Without the oxide coating, the thread’s metal high points are exposed to each other. This, in turn, creates friction, which causes heat that seizes the metal.

Can you use anti-seize on stainless steel?

Loctite® Heavy Duty Anti-Seize Provides outstanding lubrication to all metals including stainless steel, aluminum and soft metals up to 2400°F (1315°C).

What is anti-seize food grade?

Loctite Food Grade Anti-Seize Lubricant is a combination of white lubricating solids which can prevent seizing, galling, friction and wear on threaded joints and other metal-to-metal surfaces.

How is stainless steel used to prevent galling?

Sometimes using two different stainless steel grades will help prevent galling. By having dissimilar hardness ratings, the materials are much less likely to deform or fuse with one another. In the worst case, the softer material will deform before damaging the other material, allowing you to remove the damaged part without affecting the other.

What kind of metals are susceptible to galling?

There are several metals that are potentially susceptible to galling based on the conditions we described in part one. The two most common are aluminum and austenitic stainless steels, with the effect being much less likely in metals like tool steel or martensitic stainless steel.

Why do I have galling in my stainless steel pump?

This can happen when installing a bolt into a threaded hole, or a fitting into a pump housing. It is usually prevalent with stainless steel parts but can happen with any material.

What kind of thread should I use to prevent galling?

Brass and bronze are frequently used for bearings, bushings and other sliding applications due to their tendency to resist galling. Opt for coarse threads with a 2A-2B fit by the Unified Thread Standards. Coarse versus fine threads give you a larger thread allowance and are more tolerant to abuse during handling.