4142PH is a widely used quenched and tempered medium carbon alloy steel. 4142PH is an oil-hardening steel of relatively high harden ability. The chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. The grade is especially suitable for forging because they have self-scaling characteristics, respond readily to heat treatment and are comparatively easy to machine in the heat-treated condition. 4142PH maintains their properties even after long exposure at relatively high working temperatures. With a combination of such highly desirable properties as good strength and wear resistance, excellent toughness coupled good ductility, and the ability to resist street at elevated temperatures, it is understandable why these are widely used and highly successful alloy steels.

This pre-hardened steel has a hardness of Brinell 262-311. 4142PH is excellent for tooling and maintenance applications and numerous machine component parts. The countless applications include backup and support tooling, die details, short run dies, arbors, spindles, brake dies, axles, bolts, forming rolls and other machine tool components. This heat-treated medium carbon alloy has every requisite for all around good service in applications requiring wear resistance toughness, high mechanical properties and good machine ability.

This material is also available as leaded steel. The addition of lead improves machine ability without sacrificing other desirable properties, with the exception that the use if the material is not recommended for applications over 400°F, since at elevated temperature ductility is low.

4142PH has 0.02 more carbon than 4140ANN.

The 4142PH that Windsor Steel Corporation has in stock is pre-heat treated versus the 4140ANN, which is annealed.

Hardening happens between 1525-1625°F.

4142PH is an oversized material,

+/- .015 up to .040 on thickness

+/- .080 up to .125 on width

Up to 1" +/- .007 up to .018

1" up to 6" +/- .015 up to .040

6" and up +/- .0625 up to .250