Killed steel's grain size
Killed steel's grain size
(OP)
Dear all,
I know that killed steel will need a content of Aluminum and Silicon as they are strong deoxidizers.
a) Is there a different range (for these elements)for different grades of steel?
b) Aluminum as a deoxidizer and for the control of grain size, then, how fine must the grain size be (in ASTM grain size number)to categorize the steel as killed steel?
c) Am I able to find all these info in ASTM standards?
d) Can I perform a chemical analysis and a grain size check to verify whether this is a killed steel or not?
Thanks!
I know that killed steel will need a content of Aluminum and Silicon as they are strong deoxidizers.
a) Is there a different range (for these elements)for different grades of steel?
b) Aluminum as a deoxidizer and for the control of grain size, then, how fine must the grain size be (in ASTM grain size number)to categorize the steel as killed steel?
c) Am I able to find all these info in ASTM standards?
d) Can I perform a chemical analysis and a grain size check to verify whether this is a killed steel or not?
Thanks!





RE: Killed steel's grain size
Fully killed steel means the oxygen is removed. So a chemical analysis can tell you the resultant O2 level because you can never completely get rid of it. Also I am not aware of a specific limit to be killed steel.
Grain size dePends on a lot of things so you can't rely on grain size.
My personal experience is that all steel is pretty much fully killed but I am in mechanical field for oil industry.
RE: Killed steel's grain size
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RE: Killed steel's grain size
RE: Killed steel's grain size
RE: Killed steel's grain size
RE: Killed steel's grain size
Yes.
There is a difference between fine grain practice and killed steel. One can have both, but killed steel does not equate to fine grained.
No. Aluminum additions may not be specified in the material specification but they can be used for deoxidation and to reduce grain size.
Yes, to check the silicon and aluminum contents.
RE: Killed steel's grain size
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: Killed steel's grain size
Grain refining is a separate treatment ,and many other additions or treatments are done to grain refine the metal.
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