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4150R HR Q&T SR is a free-machining alloy steel that provides an outstanding combination of heat treated properties and superior machinability. This alloy steel is manufactured under close quality control for uniformity to an ASTM grain size of 5 to 8. It is especially suitable width=100% for service applications where substantial strength, toughness and hardness are required.
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TYPICAL ANALYSIS |
AISI 4150 |
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Carbon (C) |
.48/.53 |
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Manganese (Mn) |
.75/1.00 |
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Silicon (Si) |
.15/.30 |
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Tungsten (W) |
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Molybdenum (Mo) |
.15/.25 |
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Chromium (Cr) |
.80/1.10 |
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Vanadium (V) |
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Sulphur (S) |
.06/.10 |
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Phosphorus (P) |
.035 MAX |
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HEAT TREATMENT
Quenched from
Tempered at
Quenching medium |
1525°F(828°C)
1100°F(593°C)
0(l) |
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TENSILE STRENGTH |
approx. 130,000 lbs. PSI |
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YIELD POINT |
approx. 125-128,000 lbs. PSI |
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BRINELL HARDNESS |
269-310 |
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ROCKWELL C |
28-32 |
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ELONGATION IN 2 |
18% |
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REDUCTION IN AREA |
51% |
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ROUNDS 1/2 - 9-1/2 Hot rolled, heat treated, stress relieved. BHN 262/311 |
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ROUNDS 10 - 18 Hammered, heat treated, stress relieved. BHN 262/311 |
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FLATS AND SQUARES Hot rolled, heat treated, machine straightened,
stress relieved. BHN 269/321 |
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