Copper Alloy C26800-H03
Supply condition
UNS C26800 · EN CW506L, CuZn33
H03 = three-quarter hard
Choose when higher yield is needed but the part still requires mild forming or riveting.
Values for the H03 condition
Other C26800 tempers and conditions
C26800 is listed in 9 conditions; see the grade overview at C26800.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OS050Default Annealed to 0.050 mm grain size | Softest standard stock condition — pick for deep drawing, spinning, severe bending and re-forming. | 110 | 324 | 55 | 55 HB | 27 % IACS |
As hot rolled | Mill hot-rolled plate/bar condition — soft, cheap, for parts that will be machined or further worked. | 117 | 331 | 50 | 58 HB | 27 % IACS |
Quarter hard | Light cold work — still very formable but with useful added stiffness for stamped brackets and trim. | 276 | 379 | 43 | 90 HB | 27 % IACS |
Half hard | The workhorse temper: good strength with enough ductility for 90° bends across the grain. | 358 | 427 | 23 | 115 HB | 27 % IACS |
H03This page Three-quarter hard | Choose when higher yield is needed but the part still requires mild forming or riveting. | 400 | 476 | 15 | 130 HB | 26.5 % IACS |
Full hard | Standard hard sheet/strip for flat stamped parts, washers and contacts needing stiffness, minimal forming. | 427 | 524 | 8 | 145 HB | 26.5 % IACS |
Extra hard | High-strength strip for flat springs and shims where only slight forming is required. | 462 | 586 | 5 | 160 HB | 26 % IACS |
Spring hard | Spring strip: highest practical elastic limit for clips, contact fingers and diaphragms. | 500 | 634 | 4 | 170 HB | 26 % IACS |
Extra spring hard | Maximum-strength thin strip; bend only along generous radii parallel to rolling direction. | 540 | 683 | 3 | 180 HB | 26 % IACS |
What is C26800-H03?
C26800-H03 is C26800 supplied in the H03 condition — choose when higher yield is needed but the part still requires mild forming or riveting. C26800-H03 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 476 MPa (69 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 105 GPa (15.2 Msi). C26800-H03 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 909°C (1,668 °F). OS050 is the default condition FabDigit quotes; H03 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- High strength — 400 MPa (58 ksi), better than 80% of copper alloy grades
C26800-H03 properties
Typical room-temperature values for C26800-H03; 13 are specific to this condition. Other listed values are C26800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C26800-H03 has a density of 8.47 g/cm³ (0.306 lb/in³), lighter than 68% of copper alloy grades. It melts at 909°C (1,668 °F).
Mechanical12
C26800-H03 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 476 MPa (69 ksi) — stronger than 80% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
C26800-H03 is rated for continuous service to 180°C (356 °F). It conducts heat at 121 W/m·K (69.9 BTU/hr·ft·°F), better than 68% of copper alloy grades. Thermal expansion is 20 µm/m·K (11.1 µin/in·°F).
Electrical3
C26800-H03 conducts electricity at 26.5 % IACS, better than 66% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C26800-H03 takes about 62 MJ of energy and emits 3.8 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C26800-H03's machinability is fair (40/100, better than 57% of copper alloy grades); weldability fair (45/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C26800-H03
Is C26800 easy to machine?
Machinability only ~30 % of free-cutting brass — gummy, long chips; use sharp positive-rake carbide, high speed, light feeds, or switch to C36000 if turning-intensive.
Can C26800 be welded?
Resistance and oxy-fuel brazing/soldering are excellent; fusion welding is fair — zinc fume and porosity require silicon-bronze filler, low heat input and ventilation.
Can C26800 be formed, bent or molded?
Outstanding cold formability in OS050/H01 for deep drawing, spinning and stamping; interanneal ~450–600 °C and stress-relieve ~260–300 °C after forming to prevent season cracking.
What surface finishes work on C26800?
Not anodizable; bright-dips, tumbling and buffing give a high polish — protect with lacquer or clear coat, or nickel/chrome/PVD plate for wear and tarnish resistance.
C26800 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cuincludes Ag | 64 – 68.5 | 66 |
| Pbimpurity limit | ≤ 0.15 | — |
| Feimpurity limit | ≤ 0.05 | — |
| Zn | balance | — |
C26800-H03 — frequently asked
What is C26800-H03 used for?
C26800-H03 is typically used for fasteners, plumbing hardware, electrical hardware and stamped and drawn parts. In short: top-formability yellow brass; 55 % elongation annealed; standard drawing and stamping brass.
What is the yield strength of C26800-H03?
C26800-H03 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 476 MPa (69 ksi) — stronger than 80% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C26800-H03 easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Machinability only ~30 % of free-cutting brass — gummy, long chips; use sharp positive-rake carbide, high speed, light feeds, or switch to C36000 if turning-intensive.
Can C26800-H03 be welded?
With care — weldability is rated fair (45/100). Resistance and oxy-fuel brazing/soldering are excellent; fusion welding is fair — zinc fume and porosity require silicon-bronze filler, low heat input and ventilation.
What surface finishes work on C26800-H03?
Not anodizable; bright-dips, tumbling and buffing give a high polish — protect with lacquer or clear coat, or nickel/chrome/PVD plate for wear and tarnish resistance.
Can C26800-H03 be formed, bent or molded?
Outstanding cold formability in OS050/H01 for deep drawing, spinning and stamping; interanneal ~450–600 °C and stress-relieve ~260–300 °C after forming to prevent season cracking.
What is the maximum service temperature of C26800-H03?
C26800-H03 is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C26800-OS050 and C26800-H10?
OS050 is the default condition — softest standard stock condition — pick for deep drawing, spinning, severe bending and re-forming. H10: maximum-strength thin strip; bend only along generous radii parallel to rolling direction. Yield strength is 110 MPa in OS050 versus 540 MPa in H10.
Sources
- ASTM B36/B36M — Brass Plate, Sheet, Strip, and Rolled Bar — ASTM International (2018)
- EN 1652 / EN 12164 — CuZn33 (CW506L) — CEN (2016)
- CDA Alloy Datasheet C26800 (Yellow Brass 66/34) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.