1.4409

[confused21]

hi all

can anyone let me know what the full chemical and mechanical spec is for 1.4409.

and are there any acceptable tolerances.

we have an issue where the Phosphorus levels are above the permitted allowed of .035

and is there any way of getting that level down in any way

 

[mrfailure]

Check out this link:

http://www.steel-grades.com/Steel-Grades/Mould-Steel/1-4409.html

Can't answer about tolerance, but it is not a good idea to have phosphorus above 0.035%, even in a stainless.

 

[micalbrch]

All sources I have say 0.035 % is the maximum for 1.4409.

 

[arunmrao]

What is the melting process, you have? It is wiser to control S, P and other deleterious elements by careful charge selection. I agree with others that P> 0.035%is not good.

I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)

 

[denlow60]

look in EN 10213 for complete information

 

[confused21]

we have induction furnaces.

the 316 raw plates are melted down and Nickel & Chrome added to spec.

but have no way of bringing the Phosphorus down.

any ideas

 

[EdStainless]

So the starting material is out of spec?
You will need to find a better source.

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[arunmrao]

As Ed state, your 316 charge is high in P. Did you run a chemical test for the raw materials ?

I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)

 

[confused21]

Yep .... ran a sample on the spectrometer ... .041 result.

we are now awaiting for a new charge from a new supplier, who has informed us of the P levels are below .3%

 

[EdStainless]

I have seen real issues with melters using scrap that is surface contaminated with P.
Either phosphate surface treatments or fertilizer residues.

In modern commodity Stainless grades it is typical to see 0.030-0.032 values.
In specialty grades we see about 0.020-0.025.


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