Alloy Grade UNS: BEARIUM® B-4 – Leaded Bronzes 

  • Overview

    Bearium B-4 is a high-performance leaded bronze alloy developed by MetalTek International, known for its exceptional friction properties and unique microstructure. This alloy consists of 70% copper, 4% tin, and 26% lead, with the lead particles uniformly dispersed throughout the material35. This composition results in superior wear resistance and excellent performance in challenging operating conditions. Bearium B-4 is specifically designed for applications where the mating shaft or component has a hardness below Rockwell C20 and is not heat-treated or carburized. It excels in environments with high speeds, poor lubrication, heat-generating loads, and elevated temperatures. This alloy is particularly well-suited for bearings, bushings, cryogenic components, pump and valve parts, shaft sleeves, turbine thrust bearings, and wear rings. Bearium B-4's unique properties make it a versatile choice for industrial applications where reliability and performance are crucial, especially in conditions where conventional bearing materials might fail.

  • Typical Uses

    Bearings, bushings, cryogenic components, pump and valve components, shaft sleeves, turbine thrust bearings, wear rings.

  • MetalTek Grade

    BEARIUM® B-4

Similar Specifications

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: n/a

Chromium: n/a

Manganese: n/a

Iron: n/a

Copper: 70

Nickel: n/a

Lead: 26

Tin: 4

Silicon: n/a

Zinc: n/a 26

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

NOTES: Typical properties.

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