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4140 / 4142 Steel

Steel
Heat-Treatable Steel
4140 / 4142

Select Your Steel Length

Imperial
steel type image

$mart Flat Stock [$mart]

Standardized Precision Blanks

Metric
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$mart Flat Stock Metric [$martM]

Standardized Precision Blanks Metric

You can easily reach out to one of our order consultants to find the exact steel products you need.
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Standard values

Working hardness: 27 HRC - 48 HRC
Delivery condition: max. 217 HB

Chemical composition in %

C

0.380000

0.38
–

0.450000

0.45
Si

0.000000

0
–

0.400000

0.4
Mn

0.600000

0.6
–

0.900000

0.9
P

0.000000

0
–

0.035000

0.035
S

0.000000

0
–

0.035000

0.035
Cr

0.900000

0.9
–

1.200000

1.2
Mo

0.150000

0.15
–

0.300000

0.3
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Technical properties

Heat-treatable steel (annealed condition) that can be used for a wide range of applications with a high degree of strength and toughness. Often used for demanding applications in automotive engineering. In quenched and tempered condition it is used in machine construction.

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Applications

mechanical engineering, machine parts, axes, knuckles, connecting rods, crankshafts, gear shafts, pinions, gears, bandages, base plates, assembling parts

Chemical designation: Working hardness: 27 HRC - 48 HRC
Delivery condition: max. 217 HB

C

0.380000

0.38
–

0.450000

0.45
Si

0.000000

0
–

0.400000

0.4
Mn

0.600000

0.6
–

0.900000

0.9
P

0.000000

0
–

0.035000

0.035
S

0.000000

0
–

0.035000

0.035
Cr

0.900000

0.9
–

1.200000

1.2
Mo

0.150000

0.15
–

0.300000

0.3

Heat-treatable steel (annealed condition) that can be used for a wide range of applications with a high degree of strength and toughness. Often used for demanding applications in automotive engineering. In quenched and tempered condition it is used in machine construction.

mechanical engineering, machine parts, axes, knuckles, connecting rods, crankshafts, gear shafts, pinions, gears, bandages, base plates, assembling parts