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  1. DuraKapp™#3 Babbitt - 1 lb. Regular Bar
    DuraKapp™#3 Babbitt - 1 lb. Regular Bar
    $15.35
    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 - 6 lb. Notch Bar
    $89.00
    ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, nominal 6 lb. notch bars. VIEW PRODUCT
  3. DuraKapp™#3 Babbitt - 35 lb. Ingot
    DuraKapp™#3 Babbitt - 35 lb. Ingot
    $501.70
    ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, nominal 35 lb. ingots. VIEW PRODUCT

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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.

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:

  • 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™#3 Technical Data Sheet

 

Click here for DuraKapp™#3 Safety Data Sheet

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