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Quenched & Tempered



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.

TYPICAL ANALYSIS

AISI 4150

Carbon (C)

.48/.53

Manganese (Mn)

.75/1.00

Silicon (Si)

.15/.30

Tungsten (W)

Molybdenum (Mo)

.15/.25

Chromium (Cr)

.80/1.10

Vanadium (V)

Sulphur (S)

.06/.10

Phosphorus (P)

.035 MAX

HEAT TREATMENT
Quenched from
Tempered at
Quenching medium

1525°F(828°C)
1100°F(593°C)
0(l)

TENSILE STRENGTH

approx. 130,000 lbs. PSI

YIELD POINT

approx. 125-128,000 lbs. PSI

BRINELL HARDNESS

269-310

ROCKWELL C

28-32

ELONGATION IN 2

18%

REDUCTION IN AREA

51%

ROUNDS 1/2 - 9-1/2 Hot rolled, heat treated, stress relieved. BHN 262/311

ROUNDS 10 - 18 Hammered, heat treated, stress relieved. BHN 262/311

FLATS AND SQUARES Hot rolled, heat treated, machine straightened,
stress relieved. BHN 269/321

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