Copper Alloy C24000-H06
Supply condition
UNS C24000 · ASTM B36 · EN CuZn20, CW503L · JIS C2400 · GB H80
H06 = extra hard
Choose for high-strength flat stock and wire where forming is limited to shallow forming or straight cut parts.
Values for the H06 condition
Other C24000 tempers and conditions
C24000 is listed in 9 conditions; see the grade overview at C24000.
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 | Standard stocked soft temper for deep drawing, spinning, tube bending and instrument work. | 105 | 290 | 55 | 55 HB | 32 % IACS |
As hot rolled | Pick for hot-rolled plate/bar where a soft, as-worked surface is acceptable and no temper control is needed. | 105 | 290 | 50 | 58 HB | 32 % IACS |
Quarter hard | Light cold-work temper when moderate stiffness is needed but severe bending/forming still follows. | 230 | 340 | 43 | 95 HB | — |
Half hard | The workhorse cold-rolled temper: good balance of strength and remaining bend ductility. | 310 | 395 | 30 | 120 HB | — |
Three-quarter hard | Use where higher yield strength is required and only mild forming (gentle bends) remains. | 380 | 450 | 15 | 135 HB | — |
Full hard | Standard hard strip/wire temper for flat springs, contacts and stiff decorative trim. | 415 | 510 | 8 | 150 HB | — |
H06This page Extra hard | Choose for high-strength flat stock and wire where forming is limited to shallow forming or straight cut parts. | 480 | 570 | 5 | 165 HB | — |
Spring hard | Spring temper strip/wire for flexible metal hose, reeds and formed springs with high elastic limit. | 510 | 620 | 4 | 175 HB | — |
Extra spring hard | Maximum cold-rolled strength for thin spring strip; almost no bend ductility, order only when the elastic limit governs. | 525 | 640 | 3 | 180 HB | — |
What is C24000-H06?
C24000-H06 is C24000 supplied in the H06 condition — choose for high-strength flat stock and wire where forming is limited to shallow forming or straight cut parts. C24000-H06 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 105 GPa (15.2 Msi). C24000-H06 has a density of 8.67 g/cm³ (0.313 lb/in³), lighter than 57% of copper alloy grades. It melts at 1,000°C (1,832 °F). OS050 is the default condition FabDigit quotes; H06 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 — 480 MPa (69.6 ksi), better than 88% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Limited ductility — 5%, worse than 93% of copper alloy grades
C24000-H06 properties
Typical room-temperature values for C24000-H06; 11 are specific to this condition. Other listed values are C24000 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C24000-H06 has a density of 8.67 g/cm³ (0.313 lb/in³), lighter than 57% of copper alloy grades. It melts at 1,000°C (1,832 °F).
Mechanical11
C24000-H06 has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
C24000-H06 is rated for continuous service to 150°C (302 °F). It conducts heat at 138 W/m·K (79.7 BTU/hr·ft·°F), better than 71% of copper alloy grades. Thermal expansion is 18.4 µm/m·K (10.2 µin/in·°F).
Electrical3
C24000-H06 conducts electricity at 32 % IACS, better than 72% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C24000-H06 takes about 58 MJ of energy and emits 4 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C24000-H06's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability fair (45/100); formability poor (28/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C24000-H06
Is C24000 easy to machine?
Machinability only ~30 % of free-cutting C36000 — gummy, long chips; use sharp positive-rake tools, high speed, light feeds and generous emulsion, or switch to C36000 where turning dominates.
Can C24000 be welded?
Fusion welding is marginal (zinc fume, porosity); resistance spot/seam welding is fair and soldering/silver brazing is excellent — braze or solder wherever possible and ventilate for Zn.
Can C24000 be formed, bent or molded?
Outstanding cold formability in OS050: deep drawing, spinning, tube bending and flexible-hose corrugating; interstage anneal at 425–600 °C and stress-relieve cold-worked parts at 260–300 °C to avoid season cracking.
What surface finishes work on C24000?
Polishes to a bright gold luster; accepts nickel/chrome/gold plating, clear lacquer and chemical patination — not anodizable, and lacquer or oil is needed to prevent tarnish.
C24000 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 |
|---|---|---|
| CuASTM B36/B135 range for C24000 | 78.5 – 81.5 | 80 |
| Pbimpurity limit | ≤ 0.05 | — |
| Feimpurity limit | ≤ 0.05 | — |
| Znbalance, incl. minor unnamed impurities | balance | — |
C24000-H06 — frequently asked
What is C24000-H06 used for?
C24000-H06 is typically used for musical instruments, flexible metal hose, jewelry and battery caps. In short: high-elongation drawing brass; warm gold color; flexible-hose corrugating grade.
What is the yield strength of C24000-H06?
C24000-H06 has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 88% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C24000-H06 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Machinability only ~30 % of free-cutting C36000 — gummy, long chips; use sharp positive-rake tools, high speed, light feeds and generous emulsion, or switch to C36000 where turning dominates.
Can C24000-H06 be welded?
With care — weldability is rated fair (45/100). Fusion welding is marginal (zinc fume, porosity); resistance spot/seam welding is fair and soldering/silver brazing is excellent — braze or solder wherever possible and ventilate for Zn.
What surface finishes work on C24000-H06?
Polishes to a bright gold luster; accepts nickel/chrome/gold plating, clear lacquer and chemical patination — not anodizable, and lacquer or oil is needed to prevent tarnish.
Can C24000-H06 be formed, bent or molded?
Outstanding cold formability in OS050: deep drawing, spinning, tube bending and flexible-hose corrugating; interstage anneal at 425–600 °C and stress-relieve cold-worked parts at 260–300 °C to avoid season cracking.
What is the maximum service temperature of C24000-H06?
C24000-H06 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C24000-OS050 and C24000-H10?
OS050 is the default condition — standard stocked soft temper for deep drawing, spinning, tube bending and instrument work. H10: maximum cold-rolled strength for thin spring strip; almost no bend ductility, order only when the elastic limit governs. Yield strength is 105 MPa in OS050 versus 525 MPa in H10.
Sources
- ASTM B36/B36M — Brass Plate, Sheet, Strip, and Rolled Bar — ASTM International (2018)
- ASTM B135/B135M — Seamless Brass Tube — ASTM International (2017)
- Copper Alloy C24000 alloy datasheet (properties, tempers, machinability) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- EN 1652 / EN 12163 — Cu-Zn20 (CW503L) wrought copper products — CEN (2016)
- GB/T 2040 / GB/T 2059 — H80 (2017)
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.