أنابيب ومواسير ولفائف ووصلات نحاسية
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Brass Circles & Discs
Product Overview
Brass Circles, also known as Brass Discs or Brass Blanks, supplied by R V Metal Corporation are precision-manufactured from high-quality brass alloys to meet the demanding requirements of electrical, plumbing, decorative, industrial, and OEM manufacturing applications. Produced from rolled brass sheets and plates, these circles offer excellent dimensional accuracy, uniform thickness, smooth surface finish, and consistent metallurgical properties across all available grades of brass. Depending on the alloy composition, brass circles provide an optimal balance of electrical conductivity, corrosion resistance, formability, and machinability.
Available in a wide range of diameters, thicknesses, tempers, and brass grades such as Cartridge Brass (CuZn30), Common Brass (CuZn37), Leaded Brass, Naval Brass, and Lead-Free Brass, these circles are suitable for deep drawing, stamping, spinning, pressing, and machining operations. R V Metal Corporation supplies brass circles in annealed, half-hard, and hard conditions, ensuring compatibility with processes like cookware manufacturing, electrical component fabrication, sanitary fittings, architectural hardware, and precision turned parts. Custom sizes, tight tolerances, and application-specific specifications can be provided to meet both domestic and international standards.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Form | Brass Circles / Brass Discs / Brass Blanks |
| Manufacturing Process | Precision Blanking from Rolled Brass Sheets & Plates |
| Available Brass Grades |
CuZn30 (Cartridge Brass) CuZn37 (Common Brass) Leaded Brass (Free Cutting) Naval Brass (CuZn39Sn1) DZR Brass Lead-Free Brass (Low Pb) |
| UNS / EN Designations | C26000, C27200, C36000, C46400, CW505L, CW508L, CW602N, CW626N |
| Diameter Range | 10 mm to 1200 mm (custom diameters available) |
| Thickness Range | 0.5 mm to 50 mm (depending on grade and diameter) |
| Thickness Tolerance | As per EN / ASTM / IS standards or customer specification |
| Diameter Tolerance | ±0.10 mm to ±0.50 mm (depending on size) |
| Surface Finish | Mill Finish, Bright Finish, Polished, Oiled, Pickled |
| Edge Condition | Deburred / Smooth Edge / Machining Allowance (optional) |
| Temper / Condition | Annealed (O), Half Hard (H02), Hard (H04 / H08) |
| Flatness | High flatness suitable for stamping, spinning & pressing |
| Density (Reference) | 8.40 – 8.70 g/cm³ (grade dependent) |
| Electrical Conductivity | 20% – 28% IACS (grade dependent) |
| Machinability | Excellent (especially Leaded & Free-Cutting Brass) |
| Formability | Excellent for deep drawing, spinning & pressing (annealed grades) |
| Corrosion Resistance | Good to Excellent (Naval, DZR & Lead-Free grades superior) |
| Standards Compliance | ASTM B36 / B152 / B455, EN 1652, EN 12164, IS 410, IS 6912 |
| Customisation | Custom diameters, thicknesses, tempers & tolerances available |
| Typical Applications | Electrical Components, Cookware, Sanitary Fittings, Decorative Hardware, Automotive Parts, Industrial Machining |
Chemical Composition
| Grade / Alloy | UNS / EN | Cu % | Zn % | Pb % | Sn % | As % | Fe % | Al % | Ni % | Mn % | Si % | Other / Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cartridge Brass (70/30) | C26000 / CW505L | 68.5–71.5 | Bal. | ≤0.07 | ≤0.05 | ≤0.02 | ≤0.05 | ≤0.02 | ≤0.05 | ≤0.05 | ≤0.02 | Good deep drawability (preferred for stamping/spinning) |
| Common Brass (63/37) | C27200 / CW508L | 62.0–65.0 | Bal. | ≤0.07 | ≤0.05 | ≤0.02 | ≤0.05 | ≤0.02 | ≤0.05 | ≤0.05 | ≤0.02 | General-purpose brass for circles & blanks |
| Free-Cutting / Leaded Brass | C36000 / CW614N | 60.5–63.5 | Bal. | 2.5–3.7 | ≤0.35 | ≤0.05 | ≤0.35 | ≤0.05 | ≤0.30 | ≤0.20 | ≤0.10 | High machinability; not preferred for potable-water parts |
| Naval Brass (CuZn39Sn1) | C46400 / CW712R | 59.0–62.0 | Bal. | ≤0.20 | 0.8–1.5 | ≤0.02 | ≤0.10 | ≤0.02 | ≤0.10 | ≤0.10 | ≤0.02 | Excellent seawater resistance (washers, flanges, marine blanks) |
| DZR Brass (Dezincification Resistant) | CW602N | 60.0–63.0 | Bal. | ≤0.20 | 0.2–1.0 | 0.02–0.15 | ≤0.30 | ≤0.10 | ≤0.50 | ≤0.20 | ≤0.10 | DZR performance depends on proper heat treatment (DZR condition) |
| Lead-Free Brass (Low Pb) | CW724R / Low-Pb family | 60.0–65.0 | Bal. | ≤0.10 | ≤0.50 | ≤0.05 | ≤0.30 | ≤0.10 | ≤0.50 | ≤0.20 | ≤0.10 | Used for potable-water / RoHS-compliant components (exact chemistry by chosen grade) |
UNS Codes & Grades
| Brass Circle Grade | UNS Code (ASTM) | EN / BS Designation | Typical Composition Family | Key Property / Use Note | Common Supply Condition |
|---|---|---|---|---|---|
| Cartridge Brass (70/30) | C26000 | CW505L | CuZn30 | Best for deep drawing & spinning; clean surface finish | O (Annealed), H02 (Half-Hard) |
| Common Brass (63/37) | C27200 | CW508L | CuZn37 | General purpose blanking/stamping; good formability | O (Annealed), H02 (Half-Hard), H04 (Hard) |
| Yellow Brass (65/35) | C27000 | CW507L | CuZn35 | Balanced strength + forming; widely used for press parts | O, H02, H04 |
| Gilding Metal (95/5) | C21000 | CW502L | CuZn5 | High copper look; excellent corrosion resistance & formability | O, H02 |
| Gilding Metal (90/10) | C22000 | CW501L | CuZn10 | Decorative + forming applications; good tarnish resistance | O, H02 |
| Naval Brass (CuZn39Sn1) | C46400 | CW712R | CuZn39Sn1 | Marine/industrial blanks; improved seawater resistance | H02, H04 |
| Aluminium Brass (Heat Exchanger) | C68700 | CW702R | CuZn20Al2 (family) | Used where biofouling resistance is needed; condenser service | H04 (Hard), H08 (Extra Hard) |
| DZR Brass (Dezincification Resistant) | — | CW602N | DZR brass family | Water-contact components; requires DZR condition processing | As per EN (DZR condition) |
| Free-Cutting Brass (Machining Grade) | C36000 | CW614N | Leaded brass family | Not typical for circles; used when machining blanks are needed | H02, H04 |
| Lead-Free / Low-Lead Brass | Varies by chosen alloy | CW724R (common) | Low-Pb brass family | RoHS / potable-water compliance depends on exact grade selection | O, H02 |
Mechanical, Physical & Fabrication Properties
| Brass Grade / Family | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) | Electrical Conductivity (% IACS) | Thermal Conductivity (W/m·K) | Cold Formability | Deep Drawing / Spinning | Machinability | Weld / Braze Suitability |
|---|---|---|---|---|---|---|---|---|---|---|
| Gilding Metal (CuZn5 / CuZn10) | 250–330 | 80–150 | 45–65 | 60–95 | 35–45 | 210–230 | Excellent | Excellent | Poor | Excellent |
| Cartridge Brass (CuZn30) | 300–380 | 100–180 | 40–60 | 70–110 | 28–32 | 120–130 | Excellent | Excellent (Industry Standard) | Fair | Very Good |
| Yellow Brass (CuZn35) | 320–420 | 120–220 | 30–50 | 80–120 | 26–30 | 115–125 | Very Good | Very Good | Fair | Very Good |
| Common Brass (CuZn37) | 350–450 | 150–250 | 25–45 | 90–130 | 24–28 | 110–120 | Good | Good | Fair | Good |
| Naval Brass (CuZn39Sn1) | 380–480 | 180–280 | 20–40 | 100–150 | 18–22 | 100–110 | Moderate | Limited | Fair | Good |
| Aluminium Brass | 420–520 | 220–320 | 18–35 | 110–160 | 15–18 | 95–105 | Moderate | Limited | Poor | Good |
| DZR Brass (CW602N) | 450–550 | 250–350 | 15–30 | 120–170 | 15–18 | 100–110 | Moderate | Limited | Fair | Good |
| Free Cutting Brass (Leaded) | 350–450 | 200–300 | 10–25 | 120–160 | 22–26 | 120–130 | Poor | Not Recommended | Excellent | Fair |
| Lead-Free / Low-Lead Brass | 380–480 | 200–300 | 20–40 | 100–150 | 20–28 | 110–125 | Good | Good | Fair | Very Good |
Common Names & International Identifiers
| Brass Circle Grade / Family | Common Trade Names | UNS / ASTM | EN / DIN (CW) | ISO / EN Material Name | JIS | Typical Circle Use Identity |
|---|---|---|---|---|---|---|
| Gilding Metal (Low-Zinc Brass) | Gilding Brass, Gilding Metal, Low-Zn Brass | C21000 (CuZn5), C22000 (CuZn10) | CW500L (CuZn5), CW501L (CuZn10) | CuZn5 / CuZn10 | C2100 / C2200 | Decorative stamped circles, nameplates, deep-draw decorative parts |
| Cartridge Brass (70/30) | Cartridge Brass, Deep Drawing Brass, 70/30 Brass | C26000 (Cartridge Brass) | CW505L | CuZn30 | C2600 | Deep drawn circles, lamp cups, cookware parts, spinning blanks |
| Yellow Brass (≈65/35) | Yellow Brass, 65/35 Brass, General Purpose Brass | C26800 (Yellow Brass) | CW508L | CuZn35 | C2680 | Stamped circles, pressed components, general fabrication blanks |
| Common Brass (≈63/37) | Common Brass, Muntz-type Brass (light-duty), 63/37 Brass | C27200 (Yellow Brass / 63/37 family) | CW509L | CuZn37 | C2700 / C2720 (by supplier mapping) | General-purpose circles, architectural parts, non-critical formed items |
| Admiralty Brass | Admiralty Brass, Tube Sheet Brass, Arsenical Brass (Admiralty type) | C44300 (Admiralty Brass) | CW103C | CuZn28Sn1As | — | Heat exchanger / condenser plate circles, marine cooling components |
| Naval Brass (Tin Brass) | Naval Brass, Tin Brass, Marine Brass | C46400 (Naval Brass) | CW606N | CuZn39Sn1 | — | Marine hardware circles, corrosion-resistant stamped discs |
| Aluminium Brass | Aluminium Brass, Al-Brass, Sea Water Brass | C68700 (Aluminium Brass) | CW702R / CW703R (application-based mapping) | CuZn20Al2 (common family) | — | Condenser/heat exchanger plate circles for seawater service |
| DZR Brass (Dezincification Resistant) | DZR Brass, Dezincification Resistant Brass, Anti-Dezinc Brass | (Commonly supplied as DZR brass family for plumbing) | CW602N | CuZn36Pb2As (DZR family) | — | Plumbing / potable water resistant circles, valve component blanks |
| Leaded / Free-Cutting Brass | Free Cutting Brass, Leaded Brass, Screw Machine Brass | C36000 (Free-Cutting Brass) | CW614N / CW617N (by product form & lead%) | CuZn39Pb3 / CuZn40Pb2 (typical) | — | Machined discs, turned parts, not recommended for deep drawing |
| Lead-Free / Low-Lead Brass | Lead-Free Brass, Low-Lead Brass, Drinking Water Brass | (Varies by regulation/standard) | CW724R / CW511L (family depends on alloy route) | Low-Pb brass families (application-specific) | — | Potable-water safe circles, fittings blanks, compliant components |
Standards & International Equivalents
| Brass Circle Grade / Family | ASTM / UNS (USA) | EN / DIN (Europe) | ISO Designation | JIS (Japan) | IS / BIS (India) | Typical Standard Used for Circles | Notes (Equivalency Reality Check) |
|---|---|---|---|---|---|---|---|
| Gilding Brass (Low-Zn) | ASTM B36 / B36M (sheet/strip/plate): C21000, C22000 | EN 1652 (sheet/strip): CW500L (CuZn5), CW501L (CuZn10) | ISO 426-1 / ISO 431 (wrought copper alloys): CuZn5 / CuZn10 family | JIS H 3100: C2100 / C2200 | IS 410 (Brass sheet/strip/plate): low-zinc brass within limits | ASTM B36 / EN 1652 / JIS H 3100 | Use for decorative + deep drawing; confirm temper & grain size for spinning blanks. |
| Cartridge Brass (70/30) | ASTM B36 / B36M: C26000 | EN 1652: CW505L (CuZn30) | ISO (wrought brass family): CuZn30 | JIS H 3100: C2600 | IS 410: CuZn30 family (commonly supplied as cartridge brass) | ASTM B36 / EN 1652 / JIS H 3100 | Closest “global” drawing grade; most OEM circles are asked in CuZn30. |
| Yellow Brass (≈65/35) | ASTM B36 / B36M: C26800 | EN 1652: CW508L (CuZn35) | ISO (wrought brass family): CuZn35 | JIS H 3100: C2680 | IS 410: CuZn35 family | ASTM B36 / EN 1652 / JIS H 3100 | Good for stamping + moderate forming; not as “deep draw” as CuZn30. |
| Common Brass (≈63/37) | ASTM B36 / B36M: C27200 (CuZn37 family) | EN 1652: CW509L (CuZn37) | ISO (wrought brass family): CuZn37 | JIS H 3100: C2700 / C2720 (supplier mapping varies) | IS 410: CuZn37 family | ASTM B36 / EN 1652 / JIS H 3100 | Most suppliers call it “CuZn37”; specify temper to avoid inconsistent hardness. |
| Admiralty Brass (heat exchanger / marine) | ASTM B171 / B171M (plate): C44300 | EN 1652 / EN 12451: CW103C (CuZn28Sn1As) | ISO (wrought copper alloy family): CuZn28Sn1As | — | IS grade is usually project-specified; match chemistry + properties to ASTM/EN | ASTM B171 / EN 1652 | Don’t market as a “regular circle” grade—used for corrosion duty, not general forming. |
| Naval Brass (Tin Brass) | ASTM B171 / B171M (plate): C46400 | EN 1652 / EN 12164/12165 (by product form): CW606N (CuZn39Sn1) | ISO: CuZn39Sn1 | — | Project/OEM mapping; supply against EN/ASTM with test certificate | ASTM B171 / EN CW606N route | Used in marine hardware; equivalence depends on Sn% + temper, not just name. |
| Aluminium Brass (seawater condenser grade) | ASTM B171 / B171M (plate): C68700 | EN (family used in condenser service): CW702R / CW703R (confirm by application) | ISO family: CuZn20Al2 (typical Al-brass family) | — | Often supplied to condenser/heat-exchanger specs; match ASTM/EN chemistry | ASTM B171 + project spec | Al-brass naming varies widely—list only if you can certify exact chemistry. |
| DZR Brass (dezincification resistant) | (Usually specified by EN for DZR; ASTM varies by product & plumbing codes) | EN 12164/12165/12168 (by product form): CW602N (DZR) | ISO family: CuZn36Pb2As (DZR family) | — | Indian plumbing projects often ask “DZR as per EN CW602N” | EN CW602N + plumbing code requirement | DZR is compliance-driven. Don’t claim “equivalent” unless you meet dezincification test. |
| Free-Cutting / Leaded Brass (machining grade) | ASTM B16 / B16M (free-cutting brass rod/bar): C36000 | EN 12164/12165: CW614N / CW617N (depends on Pb%) | ISO family: CuZn39Pb3 / CuZn40Pb2 (typical) | — | IS supply is usually against UNS/EN with chemistry + properties | ASTM B16 / EN 12164 | Not a forming “circle” grade. If you list it, clearly mark it as machining blanks only. |
Applications
| Brass Circle Grade | Typical Composition | Primary Applications | Industry / Sector | Key Functional Advantage | Remarks (Selection Logic) |
|---|---|---|---|---|---|
| Gilding Brass | CuZn5 / CuZn10 | Decorative discs, medals, nameplates, fine stamping blanks | Decorative, craft, electrical accessories | Excellent surface finish, high ductility, superior colour | Chosen where appearance and deep drawing without cracking are critical |
| Cartridge Brass | CuZn30 (70/30) | Deep drawn components, lamp cups, cookware bases, spinning blanks | Lighting, utensils, electrical, OEM fabrication | Outstanding deep-drawability and uniform grain structure | Most widely used brass circle grade globally for forming operations |
| Yellow Brass | CuZn35 | Stamped parts, hardware components, architectural discs | Construction, hardware, general engineering | Balanced strength and formability | Preferred where moderate forming and higher strength are needed |
| Common Brass | CuZn37 | Washers, covers, general-purpose stamped parts | Industrial fabrication, OEM spares | Cost-effective with good machinability | Specify temper clearly to avoid hardness variation in press work |
| Admiralty Brass | CuZn28Sn1As | Heat exchanger end plates, condenser components, marine blanks | Marine, power plants, refineries | High resistance to seawater corrosion | Used for corrosion resistance, not for deep drawing aesthetics |
| Naval Brass | CuZn39Sn1 | Marine fittings, valve discs, ship hardware blanks | Shipbuilding, offshore engineering | High strength with improved dezincification resistance | Selected where mechanical strength + corrosion resistance are both required |
| Aluminium Brass | CuZn20Al2 | Condenser plates, seawater system components | Power generation, desalination, marine | Excellent erosion and bio-fouling resistance | Application-driven grade; supply strictly against project specification |
| DZR Brass | CuZn36Pb2As (DZR) | Plumbing components, potable water system blanks | Plumbing, water supply infrastructure | Superior resistance to dezincification in water service | Mandatory for potable-water compliance in many regions |
| Free Cutting / Leaded Brass | CuZn39Pb3 / CuZn40Pb2 | Machined washers, turned components, precision discs | Automotive, machining, electrical connectors | Excellent machinability and chip breaking | Not suitable for deep drawing; intended for machining blanks only |
Standard Brass Circles & Discs Dimensional Chart
| Standard Brass Circles & Discs – Dimensional & Theoretical Weight Chart (R V Metal Corporation) | ||||||
|---|---|---|---|---|---|---|
| Thickness (mm) | Standard Thickness Tolerance (mm) | Available Diameter Range (mm) | Standard Diameter Tolerance (mm) | Typical Form / Supply | Applicable Brass Grades (Examples) | Theoretical Weight (kg/m²) |
| 0.05 – 0.10 | ±0.01 | 50 – 300 | ±0.20 | Blanked / Fine punching | Gilding Brass, Cartridge Brass | 0.45 – 0.89 |
| 0.10 – 0.30 | ±0.02 | 50 – 600 | ±0.30 | Blanked / Press-ready | Cartridge Brass, CuZn35, CuZn37 | 0.89 – 2.67 |
| 0.30 – 0.80 | ±0.03 | 50 – 800 | ±0.40 | Blanked / Stamping | Cartridge Brass, CuZn35, CuZn37 | 2.67 – 7.12 |
| 0.80 – 1.50 | ±0.05 | 80 – 1000 | ±0.50 | Blanked / Stamping / Spinning | Cartridge Brass, CuZn35, CuZn37 | 7.12 – 13.35 |
| 1.50 – 3.00 | ±0.08 | 100 – 1200 | ±0.70 | Blanked / Laser / Waterjet | CuZn37, Naval Brass, Admiralty Brass | 13.35 – 26.70 |
| 3.00 – 6.00 | ±0.12 | 150 – 1500 | ±1.00 | Sawn / Laser / Waterjet | Naval Brass, Admiralty Brass, Aluminium Brass | 26.70 – 53.40 |
| 6.00 – 12.00 | ±0.20 | 200 – 2000 | ±1.50 | Plate-cut discs (heavy duty) | Naval Brass, Aluminium Brass, DZR Brass | 53.40 – 106.80 |
| Quick Reference – Theoretical Weight per Disc (kg/pc) for Common Diameters | |||||
|---|---|---|---|---|---|
| Disc Diameter (mm) | Area (m²) | Weight @ 0.5 mm (kg) | Weight @ 1.0 mm (kg) | Weight @ 2.0 mm (kg) | Weight @ 3.0 mm (kg) |
| 100 | 0.00785 | 0.035 | 0.070 | 0.140 | 0.210 |
| 150 | 0.01767 | 0.079 | 0.158 | 0.316 | 0.474 |
| 200 | 0.03142 | 0.140 | 0.281 | 0.561 | 0.842 |
| 250 | 0.04909 | 0.219 | 0.438 | 0.876 | 1.314 |
| 300 | 0.07069 | 0.315 | 0.629 | 1.259 | 1.888 |
| 400 | 0.12566 | 0.560 | 1.118 | 2.236 | 3.354 |
| 500 | 0.19635 | 0.875 | 1.747 | 3.495 | 5.242 |
| 600 | 0.28274 | 1.260 | 2.515 | 5.030 | 7.545 |
| 800 | 0.50265 | 2.237 | 4.468 | 8.936 | 13.404 |
| 1000 | 0.78540 | 3.495 | 6.987 | 13.974 | 20.961 |
Note: Theoretical weights are calculated using a standard brass density of 8.5 g/cm³ (≈ 8500 kg/m³).
Actual weight may vary with alloy chemistry (Cu/Zn/Sn/Pb/Al/As), temper, surface finish, and manufacturing tolerances.
For project / EPC documentation, specify: grade, temper (O/H02/H04/H08), thickness tolerance, diameter tolerance, flatness, and burr direction (if press-ready).
