British Spec S99 convertion to AISI
British Spec S99 convertion to AISI
(OP)
Does anybody know where I can find the American Spec (AISI?) equivalence of the British Spec S99?
S99 chemistry: 0.36-0.44 C, 0.1-0.35 Si, 0.45-0.70 Mn, 0.025 P max, 0.020 S max, 0.50-0.80 Cr, 0.45-0.65 Mo, 2.30-2.80 Ni, Fe balance.
If there is no equivalent, does anybody know the embrittlement relief time and temperature of S99 as well as tensile strength?
Thank you,
S99 chemistry: 0.36-0.44 C, 0.1-0.35 Si, 0.45-0.70 Mn, 0.025 P max, 0.020 S max, 0.50-0.80 Cr, 0.45-0.65 Mo, 2.30-2.80 Ni, Fe balance.
If there is no equivalent, does anybody know the embrittlement relief time and temperature of S99 as well as tensile strength?
Thank you,
Coka





RE: British Spec S99 convertion to AISI
The web site below identifies the S99 as a British Standard aircraft quality EN 26 High Tensile steel (2.5% NiCrMo) supplied by Interlloy;
www.interlloy.com.au/data_sheets/high_tensile_steels/en26.html
The technical data sheet has all the information you need regarding mechanical properties and welding and stress relief temperature/time parameters.
RE: British Spec S99 convertion to AISI
Coka
RE: British Spec S99 convertion to AISI
RE: British Spec S99 convertion to AISI
Yes, this is for an aerospace application, and I have been trying to get more info for the past couple of days. I should be getting an answer soon. Basically what I was trying to do is to find the american equivalence for S99. EN 26 is as a matter of fact an australian alloy. By having an american equivalency, I can consult the Aerospace Structural Metals Handbook and get more information. Do you have any other ideas?
Coka
RE: British Spec S99 convertion to AISI