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Corrosion resistance 4140 ammonium nitrate

Corrosion resistance 4140 ammonium nitrate

Corrosion resistance 4140 ammonium nitrate

(OP)
Hi all,

Can anyone steer me in the direction of where to find corrosion resistance data for 4140 steel against ammonia nitrate attack.

A table, chart or book would be great.

Thanks in advance

RE: Corrosion resistance 4140 ammonium nitrate

Do you mean Ammonium Nitrate solution? If so what sort of concentrations?

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RE: Corrosion resistance 4140 ammonium nitrate

(OP)
Its ANFO explosive, so its a paste form. AN by weight is around 94% with fuel/oil.

The support steelwork if failing because its not strong enough and someone suggested 4140 for the strength.

Its for an underground vehicle.

RE: Corrosion resistance 4140 ammonium nitrate

According to my Compass corrosion Guide it does not look like a good choice.
At least for straight AN.
How much corrosion protection you will get from the fuel oil is something for you to decide.

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Plymouth Tube

RE: Corrosion resistance 4140 ammonium nitrate

(OP)
Thanks edstainless I've ordered that book.

Are there any other corrosiontables containing that contain a high strength high corrosion resistance steel for AN?

RE: Corrosion resistance 4140 ammonium nitrate

A duplex stainless (even one of the lean duplex alloys) should be fine.
They are high strength (not quite as high as Q&T 4130) but much stronger than other CRAs.
Alloys such as LDX2101 and ATI2102 are a good place to start.

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Plymouth Tube

RE: Corrosion resistance 4140 ammonium nitrate

(OP)
Thanks guys got all the information. Perfect.

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