Alloy Grade UNS: 14-4 PH – High Strength Stainless Steel

  • Overview

    14-4 PH is a high-strength stainless steel that undergoes precipitation hardening (PH) to achieve its exceptional mechanical properties. This specialized heat treatment process involves heating the alloy to a high temperature and then rapidly cooling it, effectively "freezing" specific elements in place to create a fine dispersion of strengthening precipitates. This results in significantly enhanced strength, particularly at elevated temperatures, compared to standard martensitic stainless steels. 14-4 PH also boasts superior corrosion and wear resistance compared to the 400 series martensitic grades, thanks in part to the addition of molybdenum, which enhances its resistance to pitting and crevice corrosion. This combination of high strength, corrosion resistance, and wear resistance makes 14-4 PH a valuable choice for demanding applications where components must withstand high stresses and harsh environments.

  • Typical Uses

    Aerospace, chemical and food processing equipment, cutting tools, knives, cylinders, gears, bearings, hollow shafts, landing gears, bushings, marine gas turbine, nuclear flow control, pump and valve components, pressure vessels, shaft sleeves, turbine engine parts.

  • MetalTek Grade

    14-4 PH®

* Produced under license of AK Properties / ARMCO Advance Materials Corp.

Similar Specifications

Cast UNS: J92240

Cast Grade: 14-4 PH

Military/AMS: AMS 5340

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.06

Chromium: 13.50-14.25

Manganese: 0.7

Iron: n/a

Copper: 3.0-3.5

Nickel: 3.75-4.75

Lead: n/a

Tin: n/a

Silicon: 0.50-1.00

Zinc: n/a

Other: Mo 2.0-2.5; Nb 0.15-0.35; Ta 0.05 MAX; N 0.05 MAX

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal, HOMOG, Age

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