30NCD12 Trf. Bon(R118-134) alternate

[rayhawk]

I am working on a job that specifies the above mentioned material (or 30NCD16 Bon. A Spec. AIR9160). I need to purchase 2" round bar and need a readily available alternative material. If anyone has the details for this material or can tell me where to find the specs it would be appreciated. I am hoping the R118-134 or the AIR9160 also specifies the condition/temper as well, as I don't have any further information on the requirements than I have listed here.

 

[TVP]

If you want a US supplier, then LESCALLOY® 35NCD16 VAC-ARC® from Latrobe Steel is probably your only choice. The nominal C concentration is a little higher than 30NCD16, but there should not be any problem with its service performance. Here is a link with some additional information from Latrobe:

http://www.latrobesteel.com/assets/documents/datasheets/35NCD16.pdf

There are several European producers of this grade, including Corus, Ugitech, DEW, and probably Aubert + Duval. It is stocked by some aero service centers in Europe.

 

[rayhawk]

Thanks for the supplier info. Is there any way to know the heat treat based on the information given? I will give them a call and see what they have to say.

 

[TVP]

I think the designation "R118-134" is supposed to indicate the ultimate tensile strength, which is often denoted by R_m in European specifications. Typically this steel would be quenched and tempered to a strength range of ~ 1100-1380 MPa (160-180 ksi), so perhaps R118-134 means 1180-1340 MPa. The AECMA organization(

http://www.aecma.org)

that issues standards like AIR1960 is currently not functioning, so I don't know how you can verify this without contacting the customer who originated the drawing. Another thread here at Eng-Tips discussed 30NCD16 in the past:

thread330-113770