Material Data Sheet

Material Class:

Alloy Steel

Material Identification Numbers:

• 4140 - AISI
• G41400 - UNS

Composition:

0.38 - 0.43 C, 0.75 - 1.00 Mn, 0.035 P (max), 0.040 S (max), 0.15 - 0.35 Si, 0.80 - 1.10 Cr, 0.15 - 0.25 Mo

Physical Strength:

Annealed ( 0 ^oF)

Tensile Strength (psi):

0

Yield Strength (psi):

0

Hardness (Bhn):

0

Hardened and Tempered (Tempering Range 0 - 0 ^oF)

Tensile Strength (psi):

110000    -    257000

Yield Strength (psi):

95000    -    238000

Hardness (Bhn):

230    -    510

Density (lbs/in³):

0

Melting Point (^oF):

0

Applications:

Notes:

Above values are based on Quenching and then Temering between 400 and 1200 deg F. The lower the tempering temperature, the greater the mechanical properties become.

(Values of 0 are unknown or not applicable)

Date Entered:  3/25/01    Last Revised:  3/25/01

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