Alloy Grade UNS: CB7Cu-1 – Exceptionally Strong Alloy

  • Overview

    CB7Cu-1, also known as MTEK 17-4 PH, is an exceptionally strong and tough precipitation hardening stainless steel alloy that boasts superior corrosion resistance compared to traditional hardenable straight chrome alloys. This alloy offers a wide range of attainable hardness and mechanical properties through various aging temperatures, allowing for customization to suit specific application needs. When fully hardened, CB7Cu-1 achieves a high strength-to-weight ratio, making it ideal for lightweight yet robust components. One of its notable advantages is its ability to be hardened at low temperatures, minimizing distortion and often allowing for finishing operations to be completed prior to hardening. Furthermore, CB7Cu-1 is readily machinable and weldable, providing flexibility in manufacturing processes.

  • Typical Uses

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

  • MetalTek Grade

    17-4 PH®

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

Similar Specifications

Cast UNS: J92180

Wrought UNS: S17400

Wrought Grade: 17-4 PH®

Cast Grade: CB7Cu-1

Cast ASTM: A747

Military/AMS: AMS 5398

* AMS specifying sand casting.

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.07

Chromium: 15.5-17.5

Manganese: 0.7

Iron: n/a

Copper: 2.5-3.2

Nickel: 3.6-4.6

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: Nb 0.15-0.35

Minimum Mechanical Properties

Heat Treatment: Solution Anneal And Age

NOTES: Properties vary with heat treatment.

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