High ductility very clean non-micro banded die casting steel
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United States of America Patent
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Feb 1, 2000
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N/A
app pub date -
Apr 23, 1998
filing date -
Apr 23, 1998
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Abstract
A die casting die and a Cr--Mo--V steel therefore having an ultimate strength of 190,000 psi, a yield strength of 160,000, a tempering response of 400 BHN at a tempering temperature of 1150.degree. F. and final gas contents of N--70 ppm, O--30 ppm and H--about 1.0 following a double vacuum melting process which includes vacuum arc degassing and vacuum arc remelt followed by annealing and heating in two stages to 1885.degree. F., soaking, rapid quenching, tempering twice and stress tempering.
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