Alloy 260， Plate，UNS N03260,E FORU

British Specs:，American Specs: AMS 5890 Bar and Forgings，German Specs:

### **Product Datasheet: Alloy 260 (Cartridge Brass, 70/30) Plate** **UNS Designation:** UNS C26000 **Common Names:** Cartridge Brass Plate, 70/30 Brass Plate #### **Overview** Alloy 260, known as Cartridge Brass, is a single-phase alpha brass renowned for its exceptional ductility, strength, and cold-working capabilities. With a nominal composition of 70% copper and 30% zinc, it is the most versatile and widely used brass alloy. In the form of plate, Alloy 260 is a preferred material for applications requiring significant formability, machinability, and an attractive finish. It is supplied in various thicknesses and tempers, making it suitable for a broad range of architectural, industrial, and decorative applications where sheet metal is too thin and rod/bar forms are insufficient. #### **Key Characteristics** * **Excellent Cold Workability:** Can be deeply drawn, stamped, bent, and formed into complex shapes without intermediate annealing. * **High Machinability:** Offers excellent machining characteristics, rated at 100% (Free-Cutting Brass C36000 = 100%), allowing for efficient milling, drilling, and turning. * **Good Strength and Hardness:** Provides a favorable strength-to-weight ratio, which can be enhanced through cold rolling (work hardening). * **Superior Corrosion Resistance:** Resists corrosion from fresh water, steam, and atmospheric exposure. * **Attractive Appearance:** Possesses a warm, gold-like color that is ideal for both functional and highly visible architectural components. * **Good Electrical and Thermal Conductivity:** Suitable for electrical components and heat transfer applications. * **Ease of Joining:** Can be readily soldered, brazed, and welded. ***Note on Dezincification:*** *In certain environments, such as stagnant, slightly acidic, or soft waters, Alloy 260 is susceptible to dezincification. For such applications, inhibited brass alloys like UNS C44300 are recommended.* --- #### **Chemical Composition (Weight % - ASTM B36 Specification)** | Element | Content (%) | | :--- | :--- | | Copper (Cu) | 68.5 - 71.5 | | Zinc (Zn) | Remainder | | Iron (Fe) | ≤ 0.05 | | Lead (Pb) | ≤ 0.07 | | Other Elements (Total) | ≤ 0.15 | *The low lead content makes it a suitable choice for applications with environmental and potable water restrictions, though compliance with local standards (e.g., NSF/ANSI 61) must be verified.* --- #### **Physical Properties (Typical)** | Property | Value | | :--- | :--- | | Density | 8.53 g/cm³ (0.308 lb/in³) | | Melting Point (Liquidus) | 955 °C (1750 °F) | | Melting Point (Solidus) | 915 °C (1680 °F) | | Thermal Conductivity | 120 W/m·K | | Electrical Conductivity | 28% IACS | | Coefficient of Thermal Expansion | 20.2 x 10⁻⁶/°C (20-300°C) | | Modulus of Elasticity | 110 GPa (16 x 10⁶ psi) | --- #### **Mechanical Properties (Typical by Temper)** The mechanical properties of brass plate are heavily dependent on its temper, which is achieved by cold rolling. | Condition | Tensile Strength (MPa) | Yield Strength (0.5% Ext) (MPa) | Elongation (% in 2 in) | Hardness (Rockwell B) | | :--- | :--- | :--- | :--- | :--- | | **O61 (Annealed)** | 325 - 410 | 75 - 145 | 55 - 65 | 40 - 60 | | **H01 (1/4 Hard)** | 380 - 450 | 125 - 240 | 40 - 55 | 65 - 75 | | **H02 (1/2 Hard)** | 415 - 485 | 205 - 330 | 25 - 45 | 75 - 85 | | **H04 (Hard)** | 485 - 565 | 395 - 485 | 8 - 20 | 85 - 92 | --- #### **International Standards** Alloy 260 plate is covered by several key international standards that define its chemical and mechanical requirements. * **ASTM (USA):** * **ASTM B36/B36M:** Standard Specification for Brass Plate, Sheet, Strip, and Rolled Bar. * **ASME (USA):** * **ASME SB36:** Equivalent to ASTM B36 for pressure vessel and boiler applications. * **SAE (USA):** * **SAE J461:** Wrought Copper and Copper Alloys. * **EN (European Norm):** * **EN 1652:** Copper and copper alloys - Plate, sheet, strip and circles for general purposes. * **Material Designation:** CW508L (Formerly CW505L). * **DIN (Germany):** * **DIN 17660:** CuZn30 (CZ106). * **JIS (Japan):** * **JIS H3100:** Copper and copper alloy sheets, plates and strips. * **Alloy Designation:** C2600. --- #### **Product Applications** Alloy 260 plate is utilized in a wide array of industries that require a combination of formability, corrosion resistance, and aesthetics. * **Architectural & Building Construction:** * Decorative wall cladding, elevator interiors, and nameplates. * Architectural facades, kick plates, and door panels. * **Industrial Components:** * Gaskets, stampings, and machined base plates. * Chemical processing equipment components. * Heat exchanger plates and tanks for non-dezincifying environments. * **Marine & Shipbuilding:** * Decorative trim, instrument panels, and non-critical marine hardware. * **Consumer Goods & Hardware:** * Craftsmanship items, jewelry findings, and decorative ornaments. * High-quality hardware and fixture plates. * **Electrical Industry:** * Switchgear components, conductive plates, and ground straps. --- #### **Disclaimer** This information is provided for reference purposes only and represents typical values and applications. The suitability of Alloy 260 plate for a specific application depends on service conditions, environment, mechanical requirements, and regulatory compliance. It is essential to consult the official material standards and engage with a qualified engineer for critical applications. Performance can be affected by factors such as temper, fabrication practices, and specific chemical environments.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2812 gallon liquid totes Special package is available on request.