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  1. DuraKapp™#2 Babbitt 1 lb. Regular Bar
    DuraKapp™#2 Babbitt 1 lb. Regular Bar
    $15.65
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, nominal 1 lb. bars. VIEW PRODUCT
  2. DuraKapp™#2 Babbitt 6 lb Notch Bar
    DuraKapp™#2 Babbitt 6 lb Notch Bar
    $90.90
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, nominal 6 lb. Notch Bars. VIEW PRODUCT
  3. DuraKapp™#2 Babbitt .187" (4.8mm) x 25 lb spool
    DuraKapp™#2 Babbitt .187" (4.8mm) x 25 lb spool
    $403.75
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .187" (4.75mm) diameter on 25 lb spool. VIEW PRODUCT
  4. DuraKapp™#2 Babbitt .125" (3.2mm) x 25 lb spool
    DuraKapp™#2 Babbitt .125" (3.2mm) x 25 lb spool
    $406.25
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .125" (3.2mm) diameter on 25 lb spool. VIEW PRODUCT
  5. DuraKapp™#2 Babbitt .098" (2.5mm) x 25 lb spool
    DuraKapp™#2 Babbitt .098" (2.5mm) x 25 lb spool
    $410.00
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .098" (2.5mm) diameter on 25 lb spool. VIEW PRODUCT
  6. DuraKapp™#2 Babbitt .079" (2mm) x 25 lb spool
    DuraKapp™#2 Babbitt .079" (2mm) x 25 lb spool
    $413.75
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .079" (2.0mm) diameter on 25 lb spool. VIEW PRODUCT
  7. DuraKapp™#2 Babbitt .062" x 25 lb spool
    DuraKapp™#2 Babbitt .062" x 25 lb spool
    $416.50
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .062" (1.6mm) diameter on 25 lb spool. VIEW PRODUCT
  8. DuraKapp™#2 Babbitt 35 lb Ingot
    DuraKapp™#2 Babbitt 35 lb Ingot
    $512.70
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, nominal 35 lb. ingots VIEW PRODUCT
  9. DuraKapp™#2 Babbitt .125" (3.2mm) x 250 lb Payout Pak
    DuraKapp™#2 Babbitt .125" (3.2mm) x 250 lb Payout Pak
    $3,999.00
    The world's most popular Babbitt for high speed machinery, engine, and generator bearing refurbishment. 89Sn/3.5Cu/7.5Sb, .125" (3.2mm) diameter in 250 lb. Payout Paks. VIEW PRODUCT

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DuraKapp™#2 is the most popular Lead-free, Tin-based Babbitt in bearing refurbishment today. Kapp Alloy’s unique processes combine high purity virgin raw materials and our proprietary Precision Microcasting™ process to create the world’s strongest, most ductile Tin-based Babbitt.

 

DuraKapp™#2 Babbitt meets or exceeds the specifications for ASTM #2 Babbitt (also known as #2 Babbitt, Grade 2, High Tin Babbitt, and Bearing Babbitt). We back all of our products with a 100% satisfaction guarantee or your money back.

 

Benefits & Features

  • Cleaner, stronger coating
  • Faster, better flow
  • Less waste
  • Fewer rejects and higher quality finished products
  • No laminations that would cause deposition problems
  • Non-splitting, virtually weld-free wire with a non-flaking surface to prevent machine feeding problems
  • Lead-free composition for environmental safety
  • Produces a soft, pliable wire for easier machine feeding
  • Homogenous structure and tight wire diameter provide even feeding and flame deposition

 

Applications

  • Sleeve Bearings in:
    • Motors
    • Engines
    • Turbines
    • Compressors
    • Pumps
    • Marine and steam engines
    • Electrical machinery
    • Corrosion Resistant Coatings
  • Electro-Magnetic Interference (EMI) Resistant Coatings
  • Spray coating on wear surfaces of high speed compressors, pumps, and mills
  • High speed, moderate pressure equipment
  • Paired with KappaTinning™ Compound and Kapp CopperBond™ Flux

 

Properties

Specification

ASTM B23:

Grade 2

QQ-T-90A:

No. 2

 

Composition

Sn (Tin):

89%

Sb (Antimony):

7.5%

Cu (Copper):

3.5%

Chemical Composition Limits: 88-90% Tin, 7-8% Antimony, 3-4% Copper

 

Trace Elements% (maximum allowable):

Iron (Fe):

0.0800%

Lead (Pb):

0.1000%

Arsenic (As):

0.1000%

Bismuth (Bi):

0.0800%

Zinc (Zn):

0.0050%

Aluminum (Al):

0.0050%

 

Component Elements Properties

Metric

English

Comments

Aluminum (Al): 

<= 0.0050 %

<= 0.0050 %

Antimony (Sb):

7.5 %

7.5 %

Arsenic (As):

<= 0.10 %

<= 0.10 %

Bismuth (Bi):

<= 0.080 %

<= 0.080 %

Cadmium (Cd): 

<= 0.050 %

<= 0.050 %

Copper (Cu):

3.5 %

3.5 %

Iron (Fe):

<= 0.080 %

<= 0.080 %

Lead (Pb): 

<= 0.35 %

<= 0.35 %

Tin (Sn):

89 %

89 %

Zinc (Zn): 

<= 0.0050 %

<= 0.0050 %

 

Technical Data

Metric

English

Comments

Density:

7.39 g/cc

0.267 lb/in³

Hardness, Brinell: 

24.5

24.5

10 mm ball/

500 kg load-30 sec.

Tensile Strength, Ultimate: 

77.0 MPa

11,200 psi

Chill cast

 

87.0 MPa

12,600 psi

Diecast

Elongation at Break: 

18 %

18 %

Chill Cast. Gage length = 4 x (area)½

Compressive Yield Strength: 

42.1 MPa

6,110 psi

Ultimate Compressive Strength: 

102.7 MPa

14,900 psi

Fatigue Strength: 

33.0 MPa at  

2 x 107 cycles

4790 psi at  

2 x 107 cycles

chill cast,

R.R. Moore Test

Melting Range:

466-669°F (241-354°C)

 

Properties of Chill Cast

Temperature

Tensile Strength

Elongation

Reduction

°C

°F

MPa

ksi

%(a

in area, %

20°C

68°F(b)

77

11.2

18%

25%

49°C

120°F

63

9.2

24%

27%

100°C

212°F (c)

45

6.5

23%

28%

149°C

300°F

28

4.0

32%

44%

(b) Compressive yield strength, 0.125% set, 42 MPa (6.1 ksi); Compressive strength, 25% set, 103 MPa (14.9 ksi)

(c) Compressive yield strength, 0.125% set, 21 MPa (3.0 ksi); Compressive strength, 25% set, 60 MPa (8.7 ksi)

Mechanical Properties

Tensile Strength:

(Typical); cast at 600°F (315°C) into mold at 302°F (150°C): 12,600 psi  (87MPa)

Proportional Limit:

FOR TENSILE PROPERTIES OF CHILL CASTINGS, SEE TABLE 1 cast at 752°F (400°C) into mold at 212°F (100°C): 1,460 psi (10.1 MPa)

Hardness:

Chill cast; Cast at 600°F (315°C) into mold at 302°F (150°C) - 24 HB. Cast at 752°F (400°C) into mold at 212°F (100°C) - 22 HB.

Elastic Modulus Tension:

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

Fatigue strength:

Chillcast, 33MPa (4.8 ksi) at 2 x 107 cycles, R.R. Moore [type] test

Mass Characteristics:

Density: 7.39 mg/m3 (0.267 lbs./in3)

Melting Range:

466-669°F (241-354°C)

Fabrication Characteristics:

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

 

Product Variants

DuraKapp™#2 is available in standard forms:

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

Also available in standard spray wire forms:

  • 1/8” (0.125”) (3.2mm)
  • 0.098” (2.5mm)
  • 0.079” (2mm)
  • 0.062” (1.6mm)

 

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

 

Also Order

 

Click here for DuraKapp™#2 Technical Data Sheet

 

Click here for DuraKapp™#2 Safety Data Sheet

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