Bronze Ingots
Phosphor, aluminium, leaded and manganese bronze ingots (C90700, C95800, C93200, C86300) made to a controlled composition. Made in Jamnagar.
High-Grade Bronze Ingots
Phosphor (tin) bronze, aluminium bronze, leaded bronze and manganese bronze ingots, made to a controlled composition for heavy wear, corrosion and marine use.
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Indian standards: IS 28 (phosphor bronze), IS 305 (aluminium bronze), IS 304 (manganese bronze), IS 318 (leaded bronze)
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European standard: EN 1982 (CC480K, CC333G, CC493K)
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American standard: ASTM B30 (C90700, C95800, C93200, C86300)
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Form: notch-bar ingots, 15 to 22 kg, and continuous slabs, 25 to 35 kg
Manufacturing Process
Four controlled steps from raw material to ingot.
Raw material sorting
Copper cathodes, tin, aluminium, nickel and sorted bronze scrap are checked against the grade.
Induction melting
Melted under flux cover in electric induction furnaces so copper, tin, aluminium and iron blend evenly.
Deoxidation and spectro test
Phosphor-copper is added to remove oxides. Composition is checked on an OES spectrometer.
Chilled mould casting
Degassed metal is poured into water-cooled iron or steel moulds for a fine grain and low porosity.
Technical Specifications & Data Sheets
Comprehensive chemical composition limits, physical constants, and mechanical properties of major Bronze Ingot grades.
1. Chemical Composition Analysis
| Bronze | UNS | EN 1982 | Main elements (%) |
|---|---|---|---|
| Phosphor bronze | C90700 | CC480K | Cu 88 to 90, Sn 10 to 12, Pb 0.5 max, Zn 0.5 max, P 0.3 max |
| Aluminium bronze | C95800 | CC333G | Cu 79 min, Al 8.5 to 9.5, Ni 4.0 to 5.0, Fe 3.5 to 4.5, Mn 0.8 to 1.5 |
| Leaded gunmetal (SAE 660) | C93200 | CC493K | Cu 81 to 85, Sn 6.3 to 7.5, Pb 6.0 to 8.0, Zn 1.0 to 4.0, Ni 1.0 max |
| High-tensile manganese bronze | C86300 | None | Cu 60 to 66, Zn 22 to 28, Al 5.0 to 7.5, Fe 2.0 to 4.0, Mn 2.5 to 5.0 |
2. Minimum Mechanical Properties (Sand Cast)
| Bronze | Tensile (MPa min) | Yield (MPa min) | Elongation (% min) | Hardness (HB) | Density (g/cm³) |
|---|---|---|---|---|---|
| C90700 | 276 | 124 | 10 | 80 | 8.77 |
| C95800 | 586 | 241 | 15 | 160 | 7.64 |
| C93200 | 241 | 124 | 15 | 65 | 8.93 |
| C86300 | 827 | 414 | 12 | 225 | 7.70 |
3. Packaging and Ingot Dimensions
| Ingot type | Weight | Size (L × W × H) | Bundle weight | Packaging |
|---|---|---|---|---|
| Notched bar ingot | 15 to 22 kg | 550 × 95 × 70 mm | 1000 kg (1 tonne) | Steel strapped, wooden pallet |
| Continuous block slab | 25 to 35 kg | 650 × 110 × 85 mm | 1000 to 1200 kg | Export shrink wrap and steel bands |
Where it is used
Key downstream manufacturing sectors reliant on high-grade bronze ingots.
Heavy bearings and bushings
Leaded and phosphor bronze for sleeve bearings, thrust washers and high-load bushings.
Marine and naval hardware
Aluminium and manganese bronze resist seawater. Used for propellers, rudders and underwater shafts.
Gears and worm wheels
Phosphor bronze for high-torque gear wheels and worm gears.
Pump impellers and valves
Resist cavitation and erosion in pumps, boiler mountings and marine valves.
Hydraulics and earthmoving
Cylinder glands, wear plates and bearings for mining and crushing equipment.
Non-sparking tools
Aluminium bronze is used for non-sparking safety tools and chemical process fittings.