Clarification - Hydrogen De-embrittlement

V

vivkrish

#1
Hi All,

We are purchasing some of the parts from our supplier.

They doing Heat treatment, plating and Hydrogen de embrittlement.

I have a doubt, Is there any method available to ensure hydrogen de embrittlement carried or not? Anyone pls help me.

Thanks,

Vivkrish.
 
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#2
Full disclosure: I am not an expert in this, but have been in your position many times.

What you are calling "hydrogen de-embrittlement" is a post plating baking process that reduces the risk of hydrogen embrittlement. However, there are many factors involved in embrittlement and this baking process should not be considered as 100% effective depending on your specific situation.

You did not mention what type of product is involved. My exposure was for plated fasteners. We did the following test to gain confidence that the supplier had correctly processed the product. We had a steel plate fabricated with approximated 20 threaded holes in it. We would then install 20 plated fasteners into this plate at a specified torque and leave for 24 hours. If there was an embrittlement issue the heads of the fasteners would pop off some time within the 24 hours.
 

Ron Rompen

Trusted Information Resource
#4
In a previous company, we had a LOT of parts which required hydrogen embrittlement testing. Basically, we clamped the parts between two steel plates, and used hydraulic rams to apply a calculated load to the portion of the part protruding from the plates - parts were required to withstand the load for 24 hrs without breaking. I believe (not sure) that this was in a GM spec.

Different OEM's have different test requirements, so depending on who you supply, your test method may be different, or the number of sample parts per lot, etc.
 
V

vivkrish

#5
In a previous company, we had a LOT of parts which required hydrogen embrittlement testing. Basically, we clamped the parts between two steel plates, and used hydraulic rams to apply a calculated load to the portion of the part protruding from the plates - parts were required to withstand the load for 24 hrs without breaking. I believe (not sure) that this was in a GM spec.

Different OEM's have different test requirements, so depending on who you supply, your test method may be different, or the number of sample parts per lot, etc.
Hi,

Can you please share the GM Spec?
 

Ron Rompen

Trusted Information Resource
#7
Sorry, but since I am no longer with that company, I no longer have access to the relevant specifications. However, I would strongly urge you to check with YOUR customer for their requirements - as I mentioned earlier, different customers have different requirements, and what works for one may not work for another.
 
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