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  1. DuraKapp™#4 Babbitt - 1 lb. Regular Bar
    DuraKapp™#4 Babbitt - 1 lb. Regular Bar
    $14.65
    ASTM B23 #4 - OEM refurbishment LEAD Babbitt for moderate speed machinery, engines, and generators. 75Sn/10Pb/3Cu/12Sb, nominal 1 lb. bars. VIEW PRODUCT
  2. DuraKapp™#4 Babbitt - 6 lb. Notch Bar
    DuraKapp™#4 Babbitt - 6 lb. Notch Bar
    $84.80
    ASTM B23 #4 - OEM refurbishment LEAD Babbitt for moderate speed machinery, engines, and generators. 75Sn/10Pb/3Cu/12Sb, nominal 6 lb. notch bars. VIEW PRODUCT
  3. DuraKapp™#4 Babbitt - 35 lb. Ingot
    DuraKapp™#4 Babbitt - 35 lb. Ingot
    $477.00
    ASTM B23 #4 - OEM refurbishment LEAD Babbitt for moderate speed machinery, engines, and generators. 75Sn/10Pb/3Cu/12Sb, nominal 35 lb. ingots. VIEW PRODUCT

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DuraKapp™#4 Babbitt is a general purpose, low speed, Tin-based Babbitt. Kapp Alloy’s unique Precision Microcasting™ process, combined with high purity virgin raw materials, results in the world’s strongest, most ductile Tin-based Babbitt.

 

DuraKapp™ #4 Babbitt meets or exceeds the specifications for ASTM #4 Babbitt —also known as Hardware Babbitt or Grade 4 Babbitt. This alloy contains 10% Lead, and is NOT equivalent to QQ-T-390A No. 4 Babbitt, also known as No. 4 Babbitt. We back all of our products with a 100% satisfaction guarantee or your money back.

 

Applications

  • Refurbishing Grade 4 bearings in light to medium pressure applications in low speed shafts and drives. Historically found in equipment running slowly and continuously with little lubrication or maintenance.
  • Older slower speed air compressors, hydraulic pumps, and Electric pumps
  • Paired with KappaTinning™ Compound and Kapp CopperBond™ Flux

 

Properties

Specification

ASTM B23:

Grade 4

QQ-T-90A:

NA

 

Composition

Sn (Tin):

74.0-76.0%

Sb (Antimony):

11.0-13.0%

Cu (Copper):

2.5-3.5%

Pb (Lead):

9.3-10.7%

 

 

Technical Data

Melting Temperature Range:

363-583°F (184-306°C)

Pouring Temperature:

707°F (375°C)

Brinell Hardness @ 68°F (20°C):

24

Elongation at Break:

6%

Yield Point Compression at Temperature:

5,550 psi (38.3MPa) @ 68°F (20°C); 2,635 psi (18.2 MPa) @ 212°F (100°C)

 

Product Variants

DuraKapp™#4 is available in standard forms:

  • 35 lb. (15.9 kg) ingots
  • 6 lb. (2.7 kg) notch bars
  • 1 lb. (0.5 kg) bars

Custom alloys and forms are our specialty. Call Kapp Alloy to discuss your specific project.

Also Order

 

Click here for DuraKapp™#4 Technical Data Sheet

 

Click here for DuraKapp™#4 Safety Data Sheet

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