Gentlemen, for those of you in aluminum, We've pouring 355.0 and 356.0 for for many years now, and I'm familiar with melting, processing, etc. of these alloys.
Recently, we got an order for parts cast in 713.0 (parts investment process, casting wt. .75 lb, wall thickness .375''). I have to get...
Following austanitizing this steel can be further process by aging at temperatures based on properties required.
Condition 900 calls for holding at this temp. for 1 h. Question is: what if part is "chunky" ie. 5'' or 6'' in dia.
Shouldn't I hold at this temp. for much longer?
This alloy can have a variety of heat treatments applied: Process anneal, full anneal and of course hardened and temper.
However, normalizing is not recommended for this alloy. Why not?
We supply 4140 and 4340 castings in normalized condition. Customer Q&T parts to obtain desired properties (hardness, strength).
My question is: what difference would it make, if these alloys, and plain carbon steel ie. 1045 for that matter, were Q&T without normalizing? How microstructure thus...
Despite chemistry being OK, we experience poor elongation in our plain carbon steels and low alloy steel castings (stainless is OK).
IE. 4140 normalized 4% - 5% annealed 8% - 10%
Can get higher elongations, but on the expense of Tensile and Yield strengths.
Melting - coreless induction furnace...
