AISI 8620
AISI 8620
Carefully controlled proportions of chromium, nickel and molybdenum are responsible for the extensive use of 8620 as a carburizing alloy steel. Valuable features of this grade include extreme surface hardenability and internal strength.
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TYPICAL ANALYSIS
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AISI 8620
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Carbon (C)
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.18-.23
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Manganese (Mn)
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.70-.90
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Silicon (Si)
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.15-.30
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Nickel (Ni)
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.40-.70
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Molybdenum (Mo)
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.15-.25
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Chromium (Cr)
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.40-.60
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Phosphorus (P)
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.035 MAX
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Sulphur (S)
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.040 MAX
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HEAT TREATMENT
Carburize temperature
Reheat temperature
Quenching medium
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1700°F (927° C)
1550°F (843° C)
O (I)
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TENSILE STRENGTH
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92,000 lbs. PSI
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YIELD POINT
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64,000 lbs. PSI
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BRINELL HARDNESS
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192
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ROCKWELL B
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92
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ELONGATION AT 2”
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25.00%
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REDUCTION IN AREA
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58.00%
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MACHINIBILITY
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58.00%
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