BS 3146 and equivalences

[GraySyracuse]

Could anybody give me a reference about BS 3146 and equivalences? I am interested specific for the BS 3146 Part 1 Cla 11. What steel will be equivalent (AISI, ASTM, AMS, etc.). Also, I have a reference for "15 ND8" treated material.

Thank you
CC

 

[Carburize]

BS 3146 covers castings
CLA 11 is a 3% Cr-Mo nitriding steel.
Analysis
C 0.20/0.30
Si 0.3/0.8
Mn 0.3/0.6
S & P 0.035 max
Cr 2.9/3.5
Mo 0.4/0.7
Ni 0.4 max
Cu .3 max
V .02 max
Sn .03 max

 

[GraySyracuse]

Thank you.
Any hints about castability (investment), heat treatment?
Any cross-reference with ASTM/AMS/AISI steels?
I appreciate the help.
CC

 

[Carburize]

It is an investment casting grade but I do not know of an ASTM equivalent grade.