steel material question

All,
I am looking at a drawing that specifies the material as:
Steel, Class C6, ASTM AS400
Or
Steel CSTG, Class 150-125or 175-145.
Any idea what Steel Class C6 is? I can't find it anywhere. I think the
CSTG is for casting. The part could be machined either from solid or a
casting.
Reply to
clay
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"over a barrel" wrote in news:nOCdnRMdj_Q2YdjVnZ2dnUVZ snipped-for-privacy@scnresearch.com:
The AS400 referrs to iron-chromium alloys without added nickel.
Reply to
Anthony

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