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Common Brass Pipe 63/37 (CuZn37)
Product Overview
Common Brass Pipe 63/37 (CuZn37) offered by R V Metal Corporation is a high-quality alpha brass alloy containing approximately 63% copper and 37% zinc, widely recognized for its excellent cold working properties, good corrosion resistance, and attractive surface finish. This grade is extensively used in architectural, decorative, plumbing, and general engineering applications where moderate strength, high formability, and aesthetic appeal are essential. CuZn37 brass pipes are easy to draw, bend, expand, and fabricate, making them ideal for precision components, ornamental structures, and low-pressure fluid conveyance systems. Manufactured under strict quality control, our Common Brass Pipes ensure uniform wall thickness, consistent mechanical properties, and compliance with major international standards, delivering reliable performance for both industrial and decorative uses.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material Grade | Common Brass 63/37 (CuZn37) |
| UNS Number | C27200 |
| Copper Content (Cu) | 62.0 – 64.0 % |
| Zinc Content (Zn) | Balance (~36 – 38 %) |
| Form Supplied | Seamless / Welded Pipes & Tubes |
| Manufacturing Process | Cold Drawn / Extruded |
| Outside Diameter Range | 6 mm to 150 mm (Custom sizes available) |
| Wall Thickness Range | 0.6 mm to 10 mm |
| Standard Lengths | 3 m, 4 m, 6 m or Cut-to-Length |
| Temper Condition | Soft (Annealed), Half-Hard, Hard |
| Surface Finish | Mill Finish, Bright Drawn, Polished |
| Density | ≈ 8.44 g/cm³ |
| Operating Temperature | -20°C to +200°C (application dependent) |
| Corrosion Resistance | Good resistance to atmospheric and mild water environments |
| Fabrication | Excellent cold forming, bending, flaring & brazing characteristics |
| Standards Compliance | ASTM B135, EN 12449, IS 407, DIN 17660 |
| Typical Applications | Decorative fittings, plumbing, architectural sections, general engineering |
Chemical Composition
| Element | Chemical Symbol | Composition (%) |
|---|---|---|
| Copper | Cu | 62.0 – 64.0 |
| Zinc | Zn | Balance (Approx. 36.0 – 38.0) |
| Lead | Pb | ≤ 0.05 |
| Iron | Fe | ≤ 0.10 |
| Tin | Sn | ≤ 0.10 |
| Other Impurities | — | ≤ 0.30 (Total) |
UNS Codes & Grades
| Standard / System | Grade / Designation | Description | Typical Application Reference |
|---|---|---|---|
| UNS (Unified Numbering System) | C27200 | Common Brass 63/37 (CuZn37) | General-purpose brass pipes & tubes |
| EN (European Standard) | CuZn37 | Standard alpha brass with 63% Cu | Plumbing, decorative & light engineering |
| DIN (Germany) | Ms63 / CW508L | Wrought brass for forming | Cold worked tubes & sections |
| IS (India) | IS 407 / CuZn37 | Brass tubes & pipes grade | Industrial & architectural use |
| ASTM | B135 / B36 | Seamless brass tube specification | Heat exchangers, plumbing |
| JIS (Japan) | C2720 | Rolled brass alloy | Precision tubes & components |
| BS (United Kingdom) | CZ108 | 63/37 alpha brass | Structural & decorative tubes |
Mechanical, Physical & Fabrication Properties
| Property Category | Property | Typical Value | Remarks / Engineering Notes |
|---|---|---|---|
| Mechanical Properties | Tensile Strength | 300 – 450 MPa | Varies with temper (annealed to hard-drawn) |
| Yield Strength (0.2% Proof) | 120 – 250 MPa | Higher in cold-worked condition | |
| Elongation | 20 – 40 % | Excellent ductility in annealed state | |
| Hardness (Vickers) | 80 – 150 HV | Depends on degree of cold working | |
| Impact Resistance | Good | Stable at room temperature applications | |
| Fatigue Resistance | Moderate | Suitable for low to medium cyclic loads | |
| Physical Properties | Density | 8.44 g/cm³ | Standard for 63/37 alpha brass |
| Melting Point | 900 – 940 °C | Lower than pure copper due to zinc content | |
| Thermal Conductivity | 120 – 130 W/m·K | Good heat transfer capability | |
| Electrical Conductivity | 26 – 28 % IACS | Not intended for high-conductivity electrical use | |
| Coefficient of Thermal Expansion | 20.5 × 10⁻⁶ /°C | Stable dimensional behavior | |
| Magnetic Properties | Non-magnetic | Suitable for sensitive installations | |
| Fabrication Properties | Cold Workability | Excellent | Ideal for bending, drawing, and forming |
| Hot Workability | Good | Hot forming possible with controlled temperature | |
| Machinability | Good | Better than pure copper, lower than leaded brass | |
| Brazing & Soldering | Excellent | Compatible with soft & hard soldering alloys | |
| Weldability | Fair | Requires controlled procedures to avoid zinc loss | |
| Annealing Temperature | 450 – 650 °C | Restores ductility after cold working | |
| Corrosion Resistance | Good | Suitable for atmospheric & mild water exposure |
Common Names & International Identifiers
| Region / System | Common Name | Standard / Identifier | Description / Notes |
|---|---|---|---|
| International (Generic) | 63/37 Brass | CuZn37 | Standard alpha brass with ~63% Copper and ~37% Zinc |
| UNS (USA) | Cartridge Brass | C27200 | Most widely used designation for CuZn37 brass pipes |
| EN / Europe | Brass CuZn37 | EN CW508L | European standard equivalent for seamless brass tubes |
| DIN (Germany) | Messing CuZn37 | DIN 17660 / DIN 17671 | Traditional German designation for 63/37 brass |
| BS (United Kingdom) | 63/37 Brass | BS CZ108 | British Standard cartridge brass specification |
| IS (India) | High Brass | IS 319 (Grade II) | Common Indian reference for CuZn37 brass tubes |
| JIS (Japan) | Cartridge Brass | JIS C2600 | Japanese equivalent with similar chemical composition |
| ISO | Brass Alloy | ISO CuZn37 | International ISO designation for alpha brass |
| Commercial / Trade | Yellow Brass Pipe | Trade Name | Common market terminology used across industries |
Standards & International Equivalents
| Country / Region | Standard | Grade / Designation | Equivalent To CuZn37 (63/37) | Remarks |
|---|---|---|---|---|
| International / ISO | ISO 1634 / ISO 197 | CuZn37 | Yes | Base international designation for 63/37 brass |
| USA | ASTM B135 / ASTM B36 | C27200 | Yes | Commonly known as Cartridge Brass |
| Europe (EN) | EN 12449 / EN 12451 | CW508L | Yes | Seamless brass tubes and rods standard |
| Germany | DIN 17660 / DIN 17671 | CuZn37 | Yes | Traditional German brass specification |
| United Kingdom | BS 2871 / BS EN 12449 | CZ108 | Yes | British standard cartridge brass |
| India | IS 319 | Grade II | Yes | High brass grade widely used in India |
| Japan | JIS H3300 | C2600 | Yes | Japanese cartridge brass equivalent |
| China | GB/T 5231 | H62 / H63 | Near Equivalent | Minor compositional tolerance differences |
| Russia / CIS | GOST 15527 | L63 | Yes | Widely used brass pipe grade |
| International Trade | UNS | C27200 | Yes | Globally accepted UNS reference |
Applications
| Industry / Sector | Application | Why CuZn37 (63/37) is Used | Typical Form |
|---|---|---|---|
| Plumbing & Sanitary | Water supply pipes, fittings, connectors | Excellent corrosion resistance, good formability, hygienic properties | Seamless / welded pipes |
| HVAC & Refrigeration | Low-pressure fluid lines, heat transfer conduits | Good thermal conductivity and ease of brazing | Drawn brass tubes |
| Electrical & Electronics | Conduit pipes, protective sleeves | Non-magnetic, good electrical conductivity for brass | Precision pipes |
| Furniture & Architectural | Decorative pipes, railings, frames | Attractive golden finish, excellent polishability | Polished brass pipes |
| Automotive | Fuel lines, cooling lines, sensor housings | Good machinability and vibration resistance | Hard-drawn tubes |
| Industrial Engineering | Pneumatic lines, low-pressure hydraulic systems | Balanced strength and ductility | Seamless brass pipes |
| Marine & Shipbuilding | Freshwater and auxiliary piping | Better corrosion resistance than carbon steel in mild marine conditions | Heavy wall tubes |
| Instrumentation | Gauge lines, control tubing | Dimensional stability and smooth internal surface | Precision drawn pipes |
| Manufacturing & Fabrication | Brazed assemblies, custom pipe components | Excellent cold working and brazing characteristics | Straight lengths / coils |
| General Engineering | Custom OEM applications | Cost-effective, widely available standard brass grade | As per customer specification |
Standard Common Brass Pipe 63/37 Dimensional Chart
| Common Brass Pipe 63/37 (CuZn37) – Dimensional & Theoretical Weight Chart | |||||
|---|---|---|---|---|---|
| Nominal Size (inches) | Outside Diameter (mm) | Wall Thickness (mm) | Inside Diameter (mm) | Theoretical Weight (kg/m) | Standard Length |
| 1/4" | 6.35 | 0.80 | 4.75 | 0.145 | 3 m / 6 m |
| 3/8" | 9.53 | 0.90 | 7.73 | 0.245 | 3 m / 6 m |
| 1/2" | 12.70 | 1.00 | 10.70 | 0.375 | 3 m / 6 m |
| 3/4" | 19.05 | 1.20 | 16.65 | 0.705 | 3 m / 6 m |
| 1" | 25.40 | 1.50 | 22.40 | 1.120 | 3 m / 6 m |
| 1-1/4" | 31.75 | 1.65 | 28.45 | 1.550 | 3 m / 6 m |
| 1-1/2" | 38.10 | 1.80 | 34.50 | 2.050 | 3 m / 6 m |
| 2" | 50.80 | 2.00 | 46.80 | 3.250 | 3 m / 6 m |
| 2-1/2" | 63.50 | 2.50 | 58.50 | 5.050 | 3 m / 6 m |
| 3" | 76.20 | 3.00 | 70.20 | 7.200 | 3 m / 6 m |
| Pressure Rating vs Wall Thickness – Common Brass Pipe 63/37 (CuZn37) | ||||
|---|---|---|---|---|
| Nominal Size | Wall Thickness (mm) | Approx. Working Pressure (bar) | Approx. Working Pressure (psi) | Typical Applications |
| 1/2" | 1.00 | 25 | 360 | Water lines, low-pressure air |
| 1/2" | 1.50 | 38 | 550 | Compressed air, light industrial fluids |
| 3/4" | 1.20 | 22 | 320 | Plumbing, utility piping |
| 3/4" | 2.00 | 40 | 580 | Industrial fluids, oil lines |
| 1" | 1.50 | 20 | 290 | Drainage, water distribution |
| 1" | 2.50 | 35 | 510 | Process piping, cooling circuits |
| 2" | 2.00 | 16 | 230 | Low-pressure industrial service |
| 2" | 3.00 | 28 | 405 | Higher-pressure industrial service |
| Annealed vs Hard-Drawn Brass Pipes – Comparison | |||
|---|---|---|---|
| Parameter | Annealed (Soft) | Hard-Drawn (H) | Practical Implication |
| Temper Condition | Fully annealed | Cold worked | Determines strength & flexibility |
| Tensile Strength | Lower | Higher | Hard-drawn handles pressure better |
| Ductility | Excellent | Moderate | Annealed ideal for bending/forming |
| Bendability | Very good (manual bending) | Limited (tool bending) | Critical for site installation |
| Pressure Resistance | Lower | Higher | Hard-drawn preferred for pressurised lines |
| Dimensional Stability | Moderate | Excellent | Hard-drawn holds OD/ID better |
| Typical Supply Form | Coils or straight lengths | Straight lengths only | Affects logistics & storage |
| Typical Applications | Decorative, furniture, bends | Plumbing, industrial piping | Wrong choice = failure or rework |
