Home > Square Bar > Copper / Brass / Bronze Square Bars
Materials: Copper (Cu), Brass (CuZn), Bronze (CuNi / Aluminium Bronze)
Inox Steel India is a trusted manufacturer, supplier, stockist, and exporter of Copper, Brass, and Bronze square bars, supplying precision square bars in pure copper (Cu), brass (CuZn), and bronze (CuNi / aluminium bronze) for electrical, mechanical, marine, and industrial applications. These non-ferrous square bars are widely used where corrosion resistance, electrical conductivity, machinability, and wear resistance are critical.
Copper, brass, and bronze square bars are commonly used across electrical systems, plumbing, machining components, marine hardware, bearings, bushings, decorative applications, and industrial fabrication, where steel materials are either unsuitable or over-engineered.
All copper alloy square bars supplied by Inox Steel India are manufactured in accordance with ASTM, EN, and IS standards, ensuring consistent composition, reliable performance, and compatibility with engineering drawings.
A copper / brass / bronze square bar is a solid square-section bar made from copper or copper-based alloys, selected based on functional requirements such as conductivity, corrosion resistance, strength, or wear performance.
Although often grouped together, copper, brass, and bronze are fundamentally different materials:
Understanding these differences is essential when selecting the correct square bar material.
🔹 Copper Square Bars
🔹 Brass Square Bars
🔹 Bronze Square Bars
📌 This directly answers common buyer queries like: “how to tell difference between copper brass and bronze” and “difference between copper bronze brass”.
Inox Steel India follows controlled processing methods to ensure dimensional accuracy and consistent properties.
Manufacturing Process Overview:
This process ensures uniform structure, smooth finish, and predictable performance.
Inox Steel India supplies multiple copper alloy options:
🔹 Copper (Cu) Square Bars
Used for electrical components, earthing systems, bus bars, and plumbing parts.
🔹 Brass (CuZn) Square Bars
Preferred for machined fittings, fasteners, valves, and precision components due to excellent machinability.
🔹 Bronze (CuNi / Aluminium Bronze) Square Bars
Ideal for marine hardware, bearings, bushings, and wear-resistant applications.
MASTER TECHNICAL DATASHEET – COPPER, BRASS & BRONZE SQUARE BARS
| Parameter | Copper (Cu) | Brass (CuZn) | Bronze (CuNi / Al-Bronze) |
|---|---|---|---|
| Material Category | Pure Copper | Copper–Zinc Alloy | Copper–Nickel / Copper–Aluminium Alloy |
| Common Grades | C11000, ETP Cu | CuZn30, CuZn37 | CuNi 90/10, CuNi 70/30, Al Bronze |
| ASTM Specification | ASTM B187 | ASTM B16 | ASTM B505 / B271 |
| EN Equivalent | EN CW004A | EN CW508L | EN CW307G / CW307G |
| Copper Content | ≥ 99.9 % | 60 – 70 % | Balance Cu |
| Alloying Elements | — | Zinc (Zn) | Nickel (Ni) / Aluminium (Al) |
| Density | 8.96 g/cm³ | 8.40 – 8.70 g/cm³ | 7.6 – 8.9 g/cm³ |
| Tensile Strength | 200 – 250 MPa | 350 – 550 MPa | 450 – 700 MPa |
| Yield Strength | ≥ 70 MPa | ≥ 120 MPa | ≥ 200 MPa |
| Elongation | ≥ 30 % | ≥ 25 % | ≥ 20 % |
| Hardness | Soft | Medium | High |
| Electrical Conductivity | Excellent | Moderate | Low |
| Corrosion Resistance | Very Good | Good | Excellent (Marine) |
| Wear Resistance | Low | Medium | Very High |
| Machinability | Fair | Excellent | Good |
| Weldability | Excellent | Fair | Fair |
| Magnetic Property | Non-Magnetic | Non-Magnetic | Non-Magnetic |
| Heat Treatment | Annealed | Annealed / Hard Drawn | Annealed |
| Surface Finish | Mill / Polished | Bright / Polished | Machined / Polished |
| Manufacturing Process | Extruded / Drawn | Extruded / Drawn | Cast / Extruded |
| Size Range (Square) | 6 mm – 100 mm | 6 mm – 100 mm | 8 mm – 120 mm |
| Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length | Random / Fixed / Cut Length |
| Testing | Chemical, Dimensional | Chemical, Mechanical | Chemical, Mechanical |
| Certification | EN 10204 3.1 | EN 10204 3.1 | EN 10204 3.1 |
| HSN / HS Code | 7407.10.00 | 7407.21.00 | 7407.21.00 |
| Typical Applications | Electrical, Plumbing | Machining, Fittings | Marine, Bearings, Bushes |
Each material offers distinct advantages depending on the application:
These properties make copper alloy square bars ideal for industrial, marine, electrical, and architectural applications.
Before selecting copper, brass, or bronze square bars, buyers should consider:
Correct material selection ensures long service life, reduced maintenance, and cost efficiency.
This section provides buyer-ready technical and commercial clarity for Copper, Brass, and Bronze square bars, covering standard sizes, weight calculations, indicative pricing, testing, and application mapping across electrical, machining, marine, and industrial uses.
Inox Steel India supplies copper alloy square bars in standard industry sizes as well as custom cut lengths for machining, fabrication, and OEM requirements.
🔹 Standard Square Bar Sizes (mm)
6 | 8 | 10 | 12 | 16 | 20 | 22 | 25 | 30 | 32 | 35 | 40 | 45 | 50 | 60 | 65 | 70 | 75 | 80 | 100 | 120
Length: Random (3–6 m) or fixed / cut lengths
Tolerance: As per ASTM / EN / IS standards
Finish: Mill finish, Bright drawn, Polished, Machined (on request)
📌 High-demand products include solid brass square bars, brass square bars for machining, and bronze square bars for marine use.
The following square bar weight chart assists with BOQ preparation and cost estimation.
(Density considered: Copper 8.96 g/cm³, Brass 8.50 g/cm³, Bronze avg. 8.30 g/cm³)
| Square Size (mm) | Copper (kg/m) | Brass (kg/m) | Bronze (kg/m) |
|---|---|---|---|
| 10 × 10 | 0.90 | 0.85 | 0.83 |
| 12 × 12 | 1.29 | 1.22 | 1.19 |
| 16 × 16 | 2.29 | 2.16 | 2.12 |
| 20 × 20 | 3.58 | 3.40 | 3.32 |
| 25 × 25 | 5.60 | 5.31 | 5.19 |
| 30 × 30 | 8.06 | 7.65 | 7.47 |
| 40 × 40 | 14.34 | 13.60 | 13.28 |
| 50 × 50 | 22.40 | 21.25 | 20.75 |
| 65 × 65 | 37.80 | 35.90 | 35.10 |
| 75 × 75 | 50.40 | 47.90 | 46.80 |
| 100 × 100 | 89.60 | 85.00 | 83.00 |
📌 Addresses buyer searches such as:
brass square bar sizes
solid brass square bar
copper bronze brass weight difference
Prices vary based on material type, size, finish, and market metal rates. Below is an indicative price range for reference.
🔹 Indicative Price Range (INR/kg – India)
| Material | Approx. Price / Kg (INR) | Typical Use |
|---|---|---|
| Copper (Cu) | ₹ 850 – ₹ 1,150 | Electrical, earthing |
| Brass (CuZn) | ₹ 520 – ₹ 780 | Machining, fittings |
| Bronze (CuNi / Al-Bronze) | ₹ 750 – ₹ 1,200 | Marine, bearings |
🧾 Prices fluctuate with copper, zinc, nickel, and aluminium market rates.
Applicable for domestic billing and export documentation.
All copper alloy square bars supplied by Inox Steel India are checked to ensure dimensional accuracy and material authenticity.
🧪 Standard Tests Conducted:
📄 Certification:
Copper alloy square bars are selected based on functional requirements rather than strength alone.
Buyers choose Inox Steel India for material authenticity, transparent pricing, and application-driven guidance.
✅ Key Advantages:
Our approach focuses on correct material selection rather than over-specification—helping customers reduce cost without compromising performance.
| Industry | Application | Preferred Material |
|---|---|---|
| Electrical & Power | Earthing, bus bars, connectors | Copper (Cu) |
| Plumbing & HVAC | Fittings, connectors | Brass (CuZn) |
| Machining & OEM | Precision components | Brass |
| Marine & Offshore | Bearings, bushes, hardware | Bronze (CuNi / Al-Bronze) |
| Chemical & Process | Wear & corrosion-resistant parts | Bronze |
| Decorative & Architectural | Fixtures, trims | Brass |
Copper alloy square bars are packed to preserve surface finish and dimensional integrity.
📦 Packing Standards:
🌍 Export Markets: Middle East, Africa, Europe, Southeast Asia
🚚 Domestic Supply: Mumbai, Ahmedabad, Pune, Chennai, Bengaluru
Whether you need copper square bars for electrical use, brass square bars for machining, or bronze square bars for marine and wear applications, Inox Steel India delivers certified quality, fair pricing, and dependable supply.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Brass is an alloy of copper and zinc (CuZn).
Bronze, especially CuNi or aluminium bronze, is preferred for marine applications.
Yes, they can be used together depending on the application, but galvanic compatibility should be checked.
Standard sizes range from 6 mm to 100 mm, with custom sizes available.
The HSN code is 7407.21.00.
Inox Steel India supplies copper, brass & bronze square bars. Get sizes, weight chart, price per kg & certified stock for machining and marine use.