C67300 Manganese Bronze: High-Strength Wear-Resistant Alloy
(ASTM B271 C67300 | UNS C67300 | CuZn35Mn2Si)
Cu 60-64% · Zn 33-37% · Mn 1.5-2.5% · Si 0.5-1.5% · Extreme Load Specialist
Product Overview: Heavy-Duty Industrial Champion
Trusted by Caterpillar for excavator bushings and Komatsu for crusher liners, C67300 delivers exceptional wear resistance under extreme pressures. This silicon-enhanced manganese bronze withstands impact loads exceeding 1.000 MPa while resisting galling and corrosion in abrasive environments, making it ideal for mining, construction, and marine applications where failure is not an option.
Technical Parameters
| Property | C67300 Value | C86300 Bronze | 4140 Steel |
|---|
| Composition | Cu 60-64% | Cu 63% | Fe 97% |
| Zn 33-37% | Zn 25% | Cr 1% |
| Mn 1.5-2.5% | Mn 3% | Mo 0.2% |
| Tensile Strength | 720 MPa (max) | 620 MPa | 655 MPa |
| Yield Strength | 380 MPa | 280 MPa | 415 MPa |
| Impact Toughness | 110 J @ 20°C | 45 J | 55 J |
| Brinell Hardness | HB 170-210 | HB 195 | HB 197 |
| Wear Rate (ASTM G65) | 0.15 mm³/km | 0.22 mm³/km | 0.35 mm³/km |
Certifications: ASTM B271. MIL-B-17164. EN 1982. RoHS/REACH compliant (Pb<0.09%)
Top 4 Competitive Advantages
Superior Wear Resistance
40% lower wear rate than aluminum bronze in abrasive media
Impact Load Champion
Absorbs 3x more energy than C86300 (ASTM E23 testing)
Self-Lubricating Properties
Coefficient of friction μ=0.18 (vs. 0.35 for steel)
Cost-Efficiency
25% lower lifecycle cost than nickel-aluminum bronze alternatives
Critical Performance Features
Anti-Galling Design: Ideal for heavy-duty gears (ISO 7148 certified)
Corrosion Resistance: 0.03 mm/yr in seawater (ASTM G44)
Vibration Damping: Reduces resonance by 50% vs. steel
High-Temp Stability: Maintains strength at 260°C (500°F)
Non-Sparking: ATEX/IECEx certified for explosive environments
Precision Manufacturing Process
1 Induction Melting
99.99% pure copper + electrolytic metals → argon-shielded pouring
2 Sand/Centrifugal Casting
Resin-bonded sand molds (min. section: 12mm)
3 Heat Treatment
Solution annealing @ 675°C × 3hr → controlled air cooling
4 Hot Forging
Isothermal forging at 725°C (max. reduction: 80%)
5 Quality Assurance
100% PMI (XRF) + ultrasonic testing per ASTM A609
Core Applications
| Industry | Critical Components | Standards |
|---|
| Mining Equipment | Crusher jaws, dragline bearings | ISO 13349. AS 2076 |
| Construction | Excavator pins, track bushings | ISO 16047. SAE J468 |
| Marine Engineering | Rudder stocks, deck machinery | ABS Grade 4. DNV GL |
| Energy | Turbine wear rings, valve stems | API 600. ASME B16.34 |
| Railway | Coupler knuckles, brake components | AAR M-202. EN 15085 |
Top Search Keywords:
C67300 bronze bushings | Manganese bronze wear plate | Mining crusher jaws alloy | High-impact bronze
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