What is C21000 brass?
C21000 Gilding Brass is known for its excellent corrosion resistance and cold workability, and its moderate hot workability. C21000 Gilding Brass is used for the creation of coins, medals, tokens, bullet jackets, firing pin supports, fuse caps, primers, emblems, plaques, and the base for gold plates. This copper has excellent hot workability.
available shapes & sizes
Bar
Pipe
Tube
Sheet/Plate
Wire
Profile
Typical Uses for C21000 Gilding Brass Alloy
| Product Category | Product | Reason Category | Reason |
| Architecture | Ornamental Trim | Appearance | Appearance |
| Ornamental Trim | Corrosion Resistance | Corrosion Resistance | |
| Ornamental Trim | Mechanical Properties | Moderate Strength | |
| Ornamental Trim | Plating Characteristics | Plateable | |
| Consumer | Emblems | Appearance | Appearance |
| Emblems | Corrosion Resistance | Corrosion Resistance | |
| Emblems | Forming Characteristics | Formability | |
| Emblems | Mechanical Properties | Moderate Strength | |
| Emblems | Plating Characteristics | Plateable | |
| Jewelry | Appearance | Appearance | |
| Jewelry | Corrosion Resistance | Corrosion Resistance | |
| Jewelry | Forming Characteristics | Formability | |
| Jewelry | Mechanical Properties | Moderate Strength | |
| Jewelry | Plating Characteristics | Plateable | |
| Plaques, Medallions | Appearance | Appearance | |
| Plaques, Medallions | Finishing Characteristics | Accepts Lacquers | |
| Plaques, Medallions | Forming Characteristics | Coinability | |
| Plaques, Medallions | Forming Characteristics | Formability | |
| Plaques, Medallions | Plating Characteristics | Base for Gold Plate | |
| Electrical | Connectors | Conductivity (Electrical) | Electrical Conductivity |
| Connectors | Conductivity (Thermal) | Thermal Conductivity | |
| Connectors | Corrosion Resistance | Corrosion Resistance | |
| Connectors | Forming Characteristics | Formability | |
| Connectors | Mechanical Properties | Moderate Strength | |
| Rotor Bars, AC Motors | Brazing Characteristics | Brazability | |
| Rotor Bars, AC Motors | Conductivity (Electrical) | Electrical Resistivity | |
| Rotor Bars, AC Motors | Mechanical Properties | Moderate Strength | |
| Fasteners | Fasteners | Appearance | Appearance |
| Fasteners | Corrosion Resistance | Corrosion Resistance | |
| Fasteners | Forming Characteristics | Formability | |
| Fasteners | Mechanical Properties | Moderate Strength | |
| Industrial | Base for Gold Plate | Mechanical Properties | Moderate Strength |
| Base for Gold Plate | Plating Characteristics | Plateable | |
| Base for Vitreous Enamel | Mechanical Properties | Moderate Strength | |
| Base for Vitreous Enamel | Plating Characteristics | Plateable | |
| Ordinance | Bullet Jackets | Corrosion Resistance | Corrosion Resistance |
| Bullet Jackets | Forming Characteristics | Formability | |
| Bullet Jackets | Mechanical Properties | Moderate Strength | |
| Firing Pin Support Shells | Corrosion Resistance | Corrosion Resistance | |
| Firing Pin Support Shells | Forming Characteristics | Formability | |
| Firing Pin Support Shells | Mechanical Properties | Moderate Strength | |
| Fuse Caps | Corrosion Resistance | Corrosion Resistance | |
| Fuse Caps | Forming Characteristics | Formability | |
| Fuse Caps | Mechanical Properties | Moderate Strength | |
| Fuse Caps | Plating Characteristics | Plateable | |
| Primers | Corrosion Resistance | Corrosion Resistance | |
| Primers | Forming Characteristics | Formability | |
| Primers | Mechanical Properties | Moderate Strength | |
| Small Arm Ammunition:Primer Caps, Bullet Jackets | Corrosion Resistance | Corrosion Resistance | |
| Small Arm Ammunition:Primer Caps, Bullet Jackets | Corrosion Resistance | Stress Corrosion Cracking Resistance | |
| Small Arm Ammunition:Primer Caps, Bullet Jackets | Forming Characteristics | Formability | |
| Small Arm Ammunition:Primer Caps, Bullet Jackets | Mechanical Properties | Moderate Strength | |
| Other | Coins | Appearance | Appearance |
| Coins | Forming Characteristics | Coinability | |
| Coins | Plating Characteristics | Plateable | |
| Medals | Appearance | Appearance | |
| Medals | Corrosion Resistance | Corrosion Resistance | |
| Medals | Forming Characteristics | Formability | |
| Medals | Mechanical Properties | Moderate Strength | |
| Medals | Plating Characteristics | Plateable | |
| Tokens | Corrosion Resistance | Corrosion Resistance | |
| Tokens | Forming Characteristics | Coinability | |
| Tokens | Forming Characteristics | Formability | |
| Tokens | Mechanical Properties | Moderate Strength |




Chemical Composition
| Cu(1) | Pb | Zn | Fe | |||||||||
| (1) Cu + Sum of Named Elements 99.8% min. | ||||||||||||
| Min (%) | 94.0 | - | - | - | ||||||||
| Max (%) | 96.0 | 0.05 | Rem | 0.05 | ||||||||
Equivalent materials to UNS C21000
ASTM B134
ASTM B36
ASTM B587
ASTM B698
QQ W321
SAE J461
SAE J463
FAQ
| Q: What are the mechanical properties of C21000? A: Typical mechanical properties of C21000 (annealed condition) include a tensile strength of about 38–45 ksi (260–310 MPa), yield strength around 10–15 ksi (70–105 MPa), and elongation of 45–55%. Hardness is approximately 45–55 HRB. |
| Q: What is the equivalent of C21000 in European standards? A: C21000 is roughly equivalent to CuZn5 in EN standards (EN 1652) and may correspond to C2100 in JIS (Japanese standards). However, exact equivalents depend on specific composition and application requirements. |
| Q: What is C21000 brass used for? A: C21000 is commonly used in architectural decoration, jewelry crafting, medals, nameplates, electrical connectors, and decorative hardware due to its aesthetic appeal, formability, and good conductivity. |
| Q: Can C21000 be welded or brazed? A: Yes, C21000 can be welded and brazed using appropriate techniques. Oxyacetylene welding, TIG, and resistance welding are suitable, while brazing with silver-based or phosphorus-copper fillers is common. |
| Q: Is C21000 corrosion resistant? A: C21000 offers good corrosion resistance in atmospheric, freshwater, and mild chemical environments. However, it is not recommended for prolonged exposure to seawater or highly acidic/alkaline conditions. |
| Q: What is the difference between C21000 and C26000? A: The primary difference is copper content: C21000 (~95% Cu) is softer and more ductile with a reddish-gold color, while C26000 (~70% Cu) is stronger and more widely used in cartridges and mechanical parts. |
| Q: Where can I buy C21000 brass sheet or strip? A: C21000 products are supplied by specialized metal distributors, mills, and online metal suppliers. Ensure the supplier provides certified Mill Test Reports (MTR) for quality assurance. |
| Q: Does C21000 contain lead? A: Standard C21000 is typically lead-free. However, always verify with the supplier's material certification to ensure compliance with regulations like RoHS or NSF for specific applications. |
| Q: What tempers or forms is C21000 available in? A: C21000 is commonly supplied in annealed (soft), half-hard, and hard tempers. Available forms include sheet, strip, foil, wire, tube, and occasionally rod. |
Our factory
Our factory is a modern, specialized manufacturer of copper and copper alloy products with over 19 years of experience. We integrate R&D, production, and sales into one seamless operation. Equipped with advanced production lines-including continuous casting and rolling, precision drawing, cold rolling, and automated finishing equipment-we strictly adhere to the ISO 9001 quality management system and international standards such as ASTM and EN. We focus on producing high-quality copper tubes, sheets, plates, rods, wires, and strips.

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Copper product packaging
We are committed to providing safe and efficient end-to-end logistics support for every order you place. Upon completion of production, all products are professionally and custom-packaged according to their shape and transportation requirements: copper tubes are lined with moisture-proof padding and secured in reinforced wooden cases or heavy-duty steel strapping; sheets and strips are sealed with waterproof stretch film and fixed on reinforced wooden pallets, with corner protectors added to the edges; wires and rods are bundled and coated with anti-rust protection. All packaging meets export standards and can withstand long-distance sea freight and complex land transportation. We offer a variety of trade terms, including EXW, FOB, and CIF, and collaborate with multiple international logistics companies to arrange door-to-door delivery and provide real-time shipment tracking, ensuring your goods arrive at your designated destination on time and in perfect condition.





