
Gunmetal Casting, Lg2 Casting, Bronze Casting Manufacturing Capabilities
LG2/CDA 836 bronze castings are renowned for their excellent wear resistance, low friction properties, and high corrosion resistance, particularly in marine and industrial applications. Our comprehensive casting facilities offer multiple processes to suit various component requirements. 85-5-5-5 (Copper, Tin, Lead, Zinc) Bronze Gunmetal alloys AKA Red Brass or Leaded Bronze -Leaded Brass are known for casting qualities since centuries. We offer all these Bronze and Gunmetal casting at our modern casting foundry at Jamnagar in Gujarat, India.
LG2 – Gunmetal- Red Brass- CDA 83600 Copper Chemical Composition (Percentage by Weight) | |
Copper (Cu) | 83-87% |
Tin (Sn) | 4-6% |
Zinc (Zn) | 4-6% |
Lead (Pb) | 4-6% |
Maximum Impurities | 0.3% |
Physical Properties | |
Density | 8.7 g/cm³ |
Melting Range | 880-950°C |
Casting Temperature | 1050-1150°C |
Specific Heat | 376 J/kg·K |
Thermal Conductivity | 65 W/m·K |
Mechanical Properties (As Cast) | |
Ultimate Tensile Strength | 220-260 N/mm² |
Yield Strength | 110-140 N/mm² |
Elongation | 15-20% |
Hardness | 80-100 BHN |
Impact Strength | 14-20 J |
Modulus of Elasticity | 90-100 GPa |
Working Properties | |
Machinability Rating | 60% (Based on free-cutting brass = 100%) |
Maximum Service Temperature | 260°C |
Wear Resistance | Excellent |
Corrosion Resistance | Very Good (Especially in marine environments) |
Additional Properties | |
Pressure Tightness | Excellent |
Sound Dampening | Good |
Weldability | Fair (Preheating recommended) |
Magnetic Permeability | Non-magnetic |
Electrical Conductivity | 12-15% IACS |
Casting Processes Available:
Gunmetal Sand Casting (Green Sand), Lg2 Sand Casting, CDA 836 Sand casting
- Weight range: 0.050kg to 500 kg
- Ideal for medium to large components
- Cost-effective for low to medium volumes
- Typical tolerance: ±1.5mm per 100mm
- Surface finish: 150-300 RMS
Lost Wax (Investment) Casting of Bronze, Lg2 Lost wax investment casting, Gunmetal investment casting
- Weight range: 50g to 25 kg
- Excellent for intricate designs
- Superior surface finish
- Typical tolerance: ±0.2mm per 100mm
- Surface finish: 63-125 RMS
Resin Sand Casting – Shell Molding of Bronze CDA 836, Lg2 and Gunmetal
- Weight range: 1 kg to 400 kg
- Better dimensional accuracy than green sand
- Improved surface finish
- Typical tolerance: ±1mm per 100mm
- Surface finish: 125-250 RMS
Lg2 and Gunmetal Centrifugal Casting
- Weight range: 2 kg to 200 kg
- Ideal for cylindrical components
- Dense, porosity-free castings
- Typical tolerance: ±1mm per 100mm
- Surface finish: 125-250 RMS
Typical Applications and Industries:
Marine Industry
- Propellers
- Rudder bearings
- Stern tubes
- Sea water valves
- Pump casings
Industrial Equipment- Electrical industry
- Bushings and bearings
- Wear plates
- Gear blanks
- Worm wheels
- Heavy duty sliding components
- Bronze Hotline clamps
- Bronze Transformer connectors
- Bronze Transformer Spades Spade terminals
- Brass and Bronze Terminals and Eye bolts for Transformer LV bushings
Oil and Gas
- Valve bodies
- Pump components
- Impellers
- Wear rings
- Guide bushes
Power Generation
- Turbine components
- Generator parts
- Bearing housings
- Guide vanes
- Wear rings
Material Specifications:
- LG2/CDA 836 composition: Cu-85%, Sn-5%, Zn-5%, Pb-5%
- Tensile strength: 220-260 N/mm²
- Hardness: 80-100 BHN
- Elongation: 15-20%
- Excellent wear resistance
- Good machinability
Value-Added Machining Services:
CNC Machining
- 3, 4, and 5-axis machining centers
- Maximum component size: 1500mm
- Typical tolerance: ±0.05mm
- Surface finish: 32-63 RMS
Milling Capabilities
- Horizontal and vertical milling
- Maximum component size: 1200mm
- Complex profile milling
- Gear cutting capabilities
- Spline milling
Quality Control
- CMM inspection
- Material certification
- Ultrasonic testing
- Dye penetrant testing
- Hardness testing
Heat Treatment
- Stress relieving
- Annealing
- Normalizing
- Age hardening
- Temperature controls: ±5°C
Additional Services:
- Design optimization for casting
- Pattern making
- Rapid prototyping
- Assembly services
- Custom packaging
- Inventory management
- Full documentation packages
- Export packaging
Quality Certifications:
- ISO 9001:2015
- Material certificates to EN 10204 3.1
- NDT certification
- Pressure test certification
- Dimensional reports
Delivery lead times typically range from 3-8 weeks depending on complexity and quantity. Express service available for urgent requirements. All castings are supplied with material certification and dimensional inspection reports as standard.