alloy-steel 4142 Product Guide from Online Metals

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Overview

A medium carbon alloy steel with excellent toughness, ductility, wear resistance, and strength, 4142 is popular for a wide range of applications. It can be easily machined in the annealed state, but post treatment machining should be avoided. It is typically used in cams, drill collars, bolts, couplings, reamers axles, shafting, piston rods, rams, hydraulic shafts, gears, sprockets, valves, spindles, tools, boring tools, and other heavy duty machining components.

Common Trade Names

UNS G41420, AISI 4142, C4142, Nutec 42

Other Resources

Products

Applications

Cams
Rams
Shafts
Gears
Sprockets
Tooling
Heavy Duty Machining Components

Specifications

ASTM
A322

	Annealed
Physical Properties 4142
Density	0.284 lb/in3
Modulus of Elasticity	29.9 ksi
Shear Modulus	11,600 ksi
Hardness Rockwell \| Brinell	B94 \| 187-229
Poisson's Ratio	0.29
Machinability Percentage	50%

Chemistry Information
Element	Percentage
Cr	0.8 - 1.1
Fe	96.8 - 97.8
Mn	0.75 - 1
Mo	0.15 - 0.25
C	0.4 - 0.45
Si	0.15 - 0.35
S	0 - 0.04
P	0 - 0.035

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