What is c28000 brass?
UNS C28000 brass, often known as Muntz metal, is a copper-zinc alloy composed of roughly 60% copper and 40% zinc. It was named after George F. Muntz, who invented the alloy in the early 1800s. C28000 brass is corrosion-resistant, machinable, and has high strength and ductility. Inconel may also be easily linked using soldering or brazing, making it appropriate for a wide range of applications.
UNS C28000 brass has better oxidation resistance. It is resistant to rust and other types of corrosion, particularly when exposed to air and moisture. However, like most copper alloys, it tarnishes with time due to oxygen and other atmospheric contaminants. It is critical to keep the surface of UNS C28000 brass clean and free of pollution in order to preserve its oxidation resistance.
c28000 brass chemical composition
Copper (Cu): 60.0% minimum, 63.0% maximum. This is the primary alloying element.
Zinc (Zn): The remainder, constituting approximately 37.0% to 40.0% of the alloy. It is the balancing element.
Lead (Pb): 0.30% maximum. In modern production, the lead content is typically maintained well below this maximum, often under 0.07%, making it suitable for applications with lead restrictions.
Iron (Fe): 0.07% maximum. Iron is controlled as an impurity.
Other Elements: The total of all other unnamed impurities shall not exceed 0.15%.
C28000 MUNTZ METAL CHEMICAL COMPOSITION
(%max., unless shown as range or min.)
| Cu | Pb | Zn | Fe | |
| Min./Max. | 59.0-63.0 | .09 | Rem | .07 |
C28000 MUNTZ METAL MECHANICAL PROPERTIES
(measured at room temperature, 68 F (20 C)
| Form | Temper | Temper Code |
Tensile Strength (ksi) |
Yield Strength (0.5% ext. under load) |
Elongation | Rockwell Hardness "B" |
Rockwell Hardness "F" |
Rockwell Hardness "30T" |
Shear Strength |
Torsion Modulus (ksi) Hard. |
Ultimate Tensile Strength in Shear (ksi) |
Section Size (in) |
Cold Work (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flat Products | 1/2 Hard | H02 | 70 Typ | 50 Typ | 10 Typ | 75 Typ | - | 67 Typ | 44 Typ | - | - | 0.04 | - |
| 1/8 Hard | H00 | 60 Typ | 35 Typ | 30 Typ | 88 Typ | - | 54 Typ | 42 Typ | - | - | 0.04 | - | |
| As Hot Rolled | M20 | 54 Typ | 21 Typ | 45 Typ | - | 85 Typ | 49 Typ | 40 Typ | - | - | 0.04 | - | |
| Soft Anneal | O60 | 54 Typ | 21 Typ | 45 Typ | - | 80 Typ | 46 Typ | 40 Typ | - | - | 0.04 | - | |
| Flat Products And Rod |
Annealed | O61 | 54 Typ | 21 Typ | 45 Typ | - | - | - | - | - | 40 Typ | 0.04 | - |
| O61 | 54 Typ | 21 Typ | 50 Typ | - | - | - | - | - | 40 Typ | 1 | - | ||
| Rod | 1/4 Hard | H01 | 72 Typ | 50 Typ | 25 Typ | 78 Typ | - | - | - | 5.7 Typ | 45 Typ | 1 | - |
| As Hot Extruded | M30 | 52 Typ | 20 Typ | 52 Typ | - | 78 Typ | - | 39 Typ | - | - | 1 | - | |
| Soft Anneal | O60 | 54 Typ | 21 Typ | 50 Typ | - | 80 Typ | - | 40 Typ | - | - | 1 | - | |
| Tube | Hard | H04 | 74 Typ | 55 Typ | 10 Typ | 80 Typ | - | - | - | - | - | - | 30 |
| Light Anneal | O50 | 56 Typ | 23 Typ | 50 Typ | - | 82 Typ | 47 Typ | - | - | - | - | - |
Applications of UNS C28000 Brass
Because of its high corrosion resistance and strength, UNS C28000 brass is frequently utilized in the electrical and electronic, construction, marine, and other industries.
Screws, bolts, nuts and other fasteners
Taps, valves and other plumbing fixtures
Electrical components
Propellers, shafts and accessories
Door handles, hinges, locks and other building accessories
Musical instrument
Gears, bearings
Coins, medals
FAQ
| What is the density of C28000 brass? The density of C28000 brass is approximately 8.43 grams per cubic centimeter (g/cm³), or 0.304 pounds per cubic inch (lb/in³). |
| Is C28000 brass corrosion resistant? C28000 brass offers good corrosion resistance in atmospheric, fresh water, and many mild chemical environments. However, it can be susceptible to dezincification in specific stagnant or high-chloride waters. |
| What is the difference between C28000 and C26000 brass? The main difference is copper content. C28000 brass (60% Cu) is stronger and better for hot working, while C26000 brass (70% Cu) is more ductile, has better cold formability, and higher corrosion resistance. |
| What is the melting point of C28000 brass? C28000 brass has a melting range of approximately 900 to 925 degrees Celsius (1650 to 1700 degrees Fahrenheit). |
| Does C28000 brass contain lead? Yes, but in very low amounts. The ASTM specification allows a maximum of 0.30% lead, but commercial C28000 brass is typically supplied with a much lower lead content, often below 0.07%, qualifying it as "low-lead." |
| What tempers is C28000 brass available in? C28000 brass strip, sheet, and plate are commonly available in tempers such as annealed (soft), quarter hard (H01), half hard (H02), hard (H03), and spring hard (H04). |
| How does C28000 brass compare to C36000 brass? C36000 brass is a high-lead, free-machining alloy with excellent chip-breaking properties (100% machinability). C28000 brass has much lower lead content, inferior machinability (~40%), but significantly better cold workability and formability. |
| What standards cover C28000 brass strip and sheet? The primary standard for C28000 brass plate, sheet, and strip in the U.S. is ASTM B36. Other relevant standards include ASTM B370 for plate and ASTM B134 for wire. |
Our product range
1. Pure Copper (Sheet, Tube, Wire)
Primary Grades: T1 (C11000), T2 (C10100). We prioritize C11000 (T1) for its excellent conductivity.
Standards: ASTM B152 (Sheet), ASTM B75/B88 (Tube), ASTM B1/B3 (Wire), EN, JIS, GB/T.
Typical Sizes:
Tube: OD 6mm – 200mm.
Sheet: Thickness 0.5mm – 50mm.
Wire: Diameter 1.0mm – 10mm.
2. Phosphorus Deoxidized Copper (Tube, Sheet)
Primary Grades: TP1 (C12000 / CW023A), TP2 (C12200). Ideal for welding and plumbing.
Standards: ASTM B188, ASTM B75/B88, EN 12451, JIS H3300.
Typical Sizes:
Tube: OD 8mm – 150mm.
Sheet: Thickness 1.0mm – 30mm.
3. Brass (Strip & Coil)
Primary Grades: H96, H68, H62 (CuZn37 / C28000). We strongly recommend H62 for its excellent balance of strength and machinability.
Standards: ASTM B36, ASTM B134, EN 1652, JIS H3100.
Typical Sizes:
Strip/Coil: Thickness 0.1mm – 3.0mm, Width up to 600mm.
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Our factory
Our facility is equipped with industry-advanced continuous casting and rolling production lines, precision rolling mills, multi-pass drawing units, and automated forming equipment, enabling efficient and stable transformation from copper rods to finished products. Our core machinery allows us to flexibly manufacture a full range of grades-including pure copper (e.g., C11000/T1), phosphorus deoxidized copper (e.g., C12200/TP2), and brass (e.g., H62)-in the form of sheets, tubes, rods, strips, and wires. We also provide tailored processing services such as cutting, slitting, and precision finishing.
