When crusher gears scream under 50-ton loads or saltwater eats through propeller shafts, C67400 Manganese Bronze steps in. This high-strength alloy blends copper, zinc, manganese, and iron to deliver brute-force durability where standard bronzes fail. RoHS-exempt (Annex III 6c), it’s the go-to for mining, marine, and energy sectors – where failure means downtime.
TECH SPECS: ENGINEERED FOR EXTREME LOADS
(ASTM B505 / UNS C67400 / RoHS Annex III Exempt)
| Property | C67400 Bronze | C86300 Manganese Bronze | Aluminum Bronze |
|---|
| Composition | 58.5% Cu, 39% Zn, 1.5% Fe, 1% Mn | 63% Cu, 25% Zn, 4% Fe, 7% Al | 81% Cu, 11% Al |
| Tensile Strength | 760 MPa | 895 MPa | 830 MPa |
| Yield Strength (0.2%) | 415 MPa | 540 MPa | 400 MPa |
| Hardness | BHN 195 | BHN 240 | BHN 190 |
| Impact Resistance | 55 J (Charpy) | 40 J | 30 J |
| Corrosion Resistance | 5 star (Seawater) | 4 star | 5 star |
Certifications: ASTM B505. ABS Marine Approval, RoHS 3 Annex III Exemption 6c, DFARS
5 REASONS INDUSTRY CHOOSES C67400
Crush-Proof Strength
“Survives 500+ ton impacts in rock crusher jaws – 3X longer lifespan than carbon steel.”
Saltwater Immunity
“Withstands 20+ years in tidal zones – used in Panama Canal lock hinge pins since 2010.”
Heat Resilience
“Maintains strength at 300°C – ideal for steel mill conveyor bearings.”
Machining Edge
“Cuts at 180 SFM with carbide tools – 25% faster than nickel-aluminum bronzes.”
Cost-Per-Tonne Champion
“40% lower replacement costs vs. specialty alloys in dredging equipment.”
KEY FEATURES: BEYOND THE DATA SHEET
Wear Resistance: Manganese-hardened matrix resists abrasion in ore processing chutes
Fatigue Endurance: Handles 10⁸ cycles in vibrating screen components
Self-Lubricating: Embedded lead pockets reduce friction in slewing rings
Shock Absorption: Unique crystalline structure dissipates impact energy
PRECISION PROCESSING: FORGE TO FINISH
1 Alloy Fusion
"Induction-melted Cu-Zn base with 1.5% Fe/1% Mn – vacuum-degassed for zero porosity."
2 Centrifugal Casting
"Spun-cast into near-net shapes (propellers, gears) with ±2% dimensional tolerance."
3 Heat Treatment
"Solution-treated at 870°C + quenched for peak impact resistance."
4 Quality Lockdown
"Ultrasonic-tested for inclusions; hardness-mapped across sections."
WHERE IT DOMINATES: INDUSTRY APPLICATIONS
| Industry | Critical Components | Why C67400? |
|---|
| Mining | Crusher liners, dragline buckets | Absorbs rock-impact shocks without cracking |
| Marine | Propeller shafts, stern tubes | Immune to cavitation erosion |
| Energy | Turbine bushings, valve stems | Zero galling under high-pressure steam |
| Construction | Crane sheaves, excavator pins | Handles 100M+ load cycles without wear |
| Heavy Machinery | Gear blanks, hydraulic rams | Machinable to AGMA 12 precision |
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