What is the name of this steel alloy?

[k_amy21]

Name of the steel alloy?!?

Hi,

can someone please tell me how can I find out the name of an alloy if I have its composition?
Here are the percentages of each element inside:

Composition in % (min ;max)
C ( - ; 0.05)
Si ( - ; 1.00)
Mn (0.10 ;0.30)
Cr (11.50 ; 14.00)
P ( - ; 0.02)
S ( - ; 0.005)
Mo (1.50 ; 2.50)
Ni (4.50 ; 7.00)


I suppose it´s a martensitic or precipitation hardening steel, but I need the exact name/number according to which I could find it in industries (in case I decide to buy it).

Thanks in advance.

A.

 

[Astronuc]

It looks like a PH13-5. It's close to some martensitic and semi-austenitic grades.

Does it have any copper in it by any chance?


One can find some similar grades in this table.
http://www.euro-inox.org/pdf/map/Tables_TechnicalProperties_EN.pdf (page 7 of 24 in pdf)

 

[AlephZero]

I suppose it´s a martensitic or precipitation hardening steel, but I need the exact name/number according to which I could find it in industries (in case I decide to buy it).

Be warned that there are about 10,000 different "named/numbered" steel alloys in use worldwide - so finding an "exact" match to the name will probably be impossible, unless you know who made it, or you restrict your search to the alloys that are commonly used for a particular applcation.

 

[k_amy21]

Thank you for your fast respond and sorry for not answering sooner. I was searching all over the internet to try to find anything about this PH13-5 alloy. Unfortunately, I wasn´t able to find anything about it.
Astronuc:
- Where did you just find the name of that alloy!? Thanks for the file, it´s really helpfull! But is there a free software or smth similar where I can just type in the composition and that it gives me all the possibilities of the alloy names? The reason why I´m asking is because someone told me that it could be an alloy PH14-4?
- the company which gave me these data, did not mention there is copper inside. I really doubt they know it cause they also got these data from another company...

AlephZero:
- You want to say that every industry that is involved in producing alloys has it´s own way of naming/numbering the alloys? Gosh.. I thought it was universal, for example, alloy 1.4404 has the same composition on every website I looked at. Can you please clarify me that? I am not so much into this "labeling". ;)

Regards

 

[crobb]

Why don't you ask the supplier what standard their steel conforms with? If they aren't producing it to a standard or buying it from a forge that does and they can't provide Quality Assurance documentation then its probably not worth buying. BS 2HC 101:1989 is a British Standard for precipitation hardening chromium - nickel steels. If you can get a copy of that you could check its standard

 

[Astronuc]

Thank you for your fast respond and sorry for not answering sooner. I was searching all over the internet to try to find anything about this PH13-5 alloy. Unfortunately, I wasn´t able to find anything about it.
Astronuc:
- Where did you just find the name of that alloy!? Thanks for the file, it´s really helpfull! But is there a free software or smth similar where I can just type in the composition and that it gives me all the possibilities of the alloy names? The reason why I´m asking is because someone told me that it could be an alloy PH14-4?
- the company which gave me these data, did not mention there is copper inside. I really doubt they know it cause they also got these data from another company...

AlephZero:
- You want to say that every industry that is involved in producing alloys has it´s own way of naming/numbering the alloys? Gosh.. I thought it was universal, for example, alloy 1.4404 has the same composition on every website I looked at. Can you please clarify me that? I am not so much into this "labeling". ;)

Regards

Each supplier makes some standard grades, but then makes custom variants.


On the PH13-5, I was following convention with respect to Cr-Ni weight %. Normally the Cr-Ni numbers are in the middle range. So an 18-8 stainless steel would have nominally 18% Cr and 8% Ni, but could have 17-18% Cr and 7-9% Ni. Manufacturers like a wide tolerance so they don't have to reject a lot (ingots/melts) of material.

FYI - http://www.al6xn.com/SSSguide.pdf

PH13-5 would imply 11.5-14 (or tighter 12.5-13.5) Cr and Ni 4.5-5.5

With Cr (11.50 ; 14.00) and Ni (4.50 ; 7.00), that's probably closer to a 13-6, and it's probably non-standard. There is Mo (1.50 ; 2.50), but there could also be copper, but not necessarily.

15-5 PH Cr: 14-15.5, Ni 4.5-5.5 but also Cu: 2.5-4.5
http://www.aksteel.com/pdf/markets_products/stainless/precipitation/15-5_PH_Data_Sheet.pdf
17-4 PH Cr: 15-17.5, Ni 3.0-5.0 and also Cu: 3.0-5.0
http://www.aksteel.com/pdf/markets_products/stainless/precipitation/17-4_PH_Data_Bulletin.pdf

14-4 PH Cr: 13.5 - 14.25, Ni: 3.75 - 4.75, but also Mo: 2.0 - 2.5 and Cu: 3.0 - 3.5

13-8 (13-8 PH, or PH13-8 Mo)
Cr: 12.25-13.25, Ni: 7.5-8.5 and Mo: 2.00-2.50
http://www.atimetals.com/ludlum/Documents/13-8(062606).pdf


There are handbooks or catalogs of steel products, but they can be quite expensive. There is one that has an extensive list of custom grades, but I can't think of it at the moment. I saved some sample pages somewhere.