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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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DuraKapp™#3 Babbitt - 1 lb. Regular Bar$29.50ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, nominal 1 lb. bars. VIEW PRODUCT -
DuraKapp™#3 Babbitt - 5 lb. Notch Bar$129.50ASTM B23 #3 - OEM matching refurbishment Tin Babbitt for high speed machinery, engines, and generators. 84Sn/8Cu/8Sb, 5 lb. notch bars.
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ASTM-B23 Grade 3 Tin Babbitt
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 Tin Babbit Applications
Sleeve bearings in:
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- Compressors
- Electric motors
- Pumps
- Engines
Thin bearings in light to medium-pressure applications
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- Motors, converters, and dynamos
- Centrifugal pumps
- Regular-duty gas, diesel, and marine engines
- Regular duty compressors
Paired with KappaTinning™ Compound and Kapp CopperBond™ Flux
Grade 3 Tin Babbitt Properties
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Specification |
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ASTM B23: |
Grade 3 |
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QQ-T-90A: |
No. 3 |
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Composition |
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Sn (Tin): |
83.0-85.0% |
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Sb (Antimony): |
7.5-8.5% |
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Cu (Copper): |
7.5-8.5% |
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Pb (Lead): |
0.35% (max.) |
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Trace Elements (max. allowable) |
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Lead (Pb): |
0.10% |
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Arsenic (As): |
0.10% |
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Zinc (Zn): |
0.005% |
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Iron (Fe): |
0.08% |
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Bismuth (Bi): |
0.08% |
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Aluminum (Al): |
0.005% |
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Technical Data |
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Melting Temperature: |
464-792°F (240-422°C) |
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Brinell Hardness @ 68°F (20°C): |
27 |
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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) |
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Tensile Strength (Chill Cast): |
10,000 psi (69 MPa) |
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Tensile Strength (typical): |
Cast at 600°F (315°C) into mold at 302°F (150°C): 10,000psi (69 MPa) |
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Compression Yield Strength: |
6,600psi (45.5 MPa) |
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Ultimate Compression Strength: |
17,610 psi (121.4 MPa) |
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Elongation at Break: |
1% |
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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 |
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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 |
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Elastic Modulus: |
Tension; Cast at 750°F (400°C) into mold at 212°F (100°C) = 52 GPa (7.6 x 106 psi) |
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Mass Characteristics: |
Density: 7.46 g/cm3 (0.270 lbs./in.3) |
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Fabrication Characteristics: |
Casting temperature; Chill castings: 600°F (315°C) |
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Grade 3 Tin Babbitt 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