4140 Alloy Steel

Plastic Selections

4140 Steel Technical Data

Density	0.284 lb/in³
Hardness, Brinell	311
Tensile Strength,	156000 psi
Tensile Strength, Yield	143000 psi
Elongation at Break	15.5 %
Reduction of Area	56.9 %
Modulus of Elasticity	29700 ksi
Poisson's Ratio	0.29
Shear Modulus	11600 ksi
Electrical Resistivity	2.2e-005 ohm-cm
CTE, linear 20°C	6.78 µin/in-°F
CTE, linear 250°C	7.61 µin/in-°F
CTE, linear 500°C	8.11 µin/in-°F
Specific Heat Capacity at Elevated Temperature	0.113 BTU/lb-°F
Thermal Conductivity	296 BTU-in/hr-ft²-°F
Thermal Conductivity at Elevated Temperature	229 BTU-in/hr-ft²-°F

Fasteners
Self Drilling Screws	Carriage Bolts
Self Tapping Screws	Hex Nuts
Set Screws	Lag Screws
Sheet Metal Screws	Wood Screws
Washers	Spring Pins
Threaded Rods	Dowel Pins
Socket Head Shoulder Screw	Taper Pins
Socket Head Cap Screws	Shafts
Metal/Plastics Spacers-Standoffs	Felt Sheets, Discs, Strips, Cords
Machine Screws	Drill Bits
U Channels	Circuit Breakers
Eyebolts	Spur Gears
Worm Gears	Miter Gears
Gear Racks	Helical Gears
Springs	Tapes- Skived, Adhesive Backed
Exhaust, Duct, Air, Vacuum Hose	Washers