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  1. DuraKapp™#3 Babbitt - 1 lb. Regular Bar
    DuraKapp™#3 Babbitt - 1 lb. Regular Bar
    $29.50
    ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, nominal 1 lb. bars. VIEW PRODUCT
  2. DuraKapp™#3 Babbitt - 6 lb. Notch Bar
    DuraKapp™#3 Babbitt - 5 lb. Notch Bar
    $129.50

    ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, 5 lb. notch bars.

    VIEW PRODUCT
  3. DuraKapp™#3 Babbitt - 35 lb. Ingot
    DuraKapp™#3 Babbitt - 35 lb. Ingot
    $906.50

    **Minimum order quantity 350 lbs.** ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, nominal 35 lb. ingots.

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Grade 3 Babbitt Alloy - DuraKapp™#3

DuraKapp™#3 Babbitt is a general-purpose, high-speed, Lead-free, 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™#3 meets or exceeds the specifications for ASTM #3 Babbitt —also known as Super Tough, Grade 3, or No. 3 Babbitt. We stand behind our products with a 100% satisfaction guarantee or your money back.

 

Grade 3 Babbit Applications

Sleeve bearings in:

    • Compressors
    • Electric motors
    • Pumps
    • Engines

Thin bearings in light to medium-pressure applications

    • Motors, converters, and dynamos
    • Centrifugal pumps
    • Regular-duty gas, diesel, and marine engines
    • Regular duty compressors

Paired with KappaTinning™ Compound and Kapp CopperBond™ Flux

 

Physical Properties

Specification

ASTM B23:

Grade 3

QQ-T-90A:

No. 3

 

Composition

Sn (Tin):

83.0-85.0%

Sb (Antimony):

7.5-8.5%

Cu (Copper):

7.5-8.5%

Pb (Lead):

0.35% (max.)

 

Trace Elements (max. allowable)

Lead (Pb):

0.10%

Arsenic (As):  

0.10%

Zinc (Zn):  

0.005%

Iron (Fe):         

0.08%

Bismuth (Bi):   

0.08%

Aluminum (Al):

0.005%

 

Technical Data

Melting Temperature:

464-792°F (240-422°C)

Brinell Hardness @ 68°F (20°C):

27

Hardness:

Chill cast; Cast at 600°F (315°C) into mold at 302°F (150°C) -  27 HB at 68°F (20°C); 14.5 HB at 212°F (100°C)

Tensile Strength (Chill Cast):

10,000 psi (69 MPa)

Tensile Strength (typical):

Cast at 600°F (315°C) into mold at 302°F (150°C): 10,000psi (69 MPa)

Compression Yield Strength:

6,600psi (45.5 MPa)

Ultimate Compression Strength:

17,610 psi (121.4 MPa)

Elongation at Break:

1%

Yield Point, psi (MPa) Compression at Temperature:

68°F (20°C) = 6,600 psi / 45.5 MPa; 212°F (100°C) = 3,150 psi / 21.7 MPa

Johnson’s Apparent Elastic Limit psi (MPa):

68°F (20°C) = 5,350 psi / 36.9 MPa; 212°F (100°C) = 1,300 psi / 9.0MPa

Elastic Modulus:

Tension; Cast at 750°F (400°C) into mold at 212°F (100°C) = 52 GPa (7.6 x 106 psi)

Mass Characteristics:

Density: 7.46 g/cm3 (0.270 lbs./in.3)

Fabrication Characteristics:

Casting temperature; Chill castings:   600°F (315°C)

     


Product Variants

DuraKapp™#3 is available in standard forms:

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

 

Also Order

 

Click here for DuraKapp™#3 Technical Data Sheet

 

CONTACT US

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