Alloy Grade UNS: CB7Cu-1 – Exceptionally Strong Alloy

  • Overview

    CB7Cu-1 is an exceptionally strong, tough alloy of the precipitation hardening group which has corrosion resistance superior to the hardenable straight chrome alloys. A wide range of hardness and properties can be obtained by various aging temperatures. Fully hardened, it has high strength­-to-weight ratio. Because of the low temperatures at which this steel can be hardened, distortion is kept to a minimum, sometimes permitting a part to be finished prior to hardening. Also known as MTEK 17-4 PH, this alloy machines and welds readily.

  • 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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