Alloy Grade UNS: CB7Cu-2 – High Strength Stainless Steels

  • Overview

    CB7Cu-2, also known as MetalTek Grade 15-5 PH or J92110, is a high-strength martensitic stainless steel that offers a compelling combination of strength and corrosion resistance. With approximately 15% chromium and 5% nickel, this alloy surpasses the corrosion resistance of typical 400-series martensitic stainless steels while providing exceptional strength. The "PH" in its designation stands for precipitation hardening, a heat treatment process that significantly enhances its mechanical properties. CB7Cu-2 is known for its ability to withstand high stresses and resist corrosion in demanding environments, making it a valuable choice for applications requiring a balance of strength, durability, and corrosion resistance.

  • 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

    15-5 PH®

  • Poured At:

    Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division

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

Similar Specifications

Cast UNS: J92110

Wrought UNS: S15500

Wrought Grade: 15-5 PH®

Cast Grade: CB7Cu-2

Cast ASTM: A747

Military/AMS: AMS 5348

* AMS specifying centrifugal casting.

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.07

Chromium: 14-15

Manganese: 0.7

Iron: n/a

Copper: 2.5-3.2

Nickel: 4.5-5.5

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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Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
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Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
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Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.