Copper Alloy C22600-H08
Supply condition
UNS C22600
H08 = spring hard
Pick for flat springs, contacts and snap features where the gold color must be retained.
Values for the H08 condition
Other C22600 tempers and conditions
C22600 is listed in 8 conditions; see the grade overview at C22600.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for deep drawing, coining, spinning and heavy bending of jewelry blanks. | 100 | 290 | 45 | 58 HB | 41 % IACS |
Quarter hard | Pick when moderate bending or shallow forming is still needed but annealed material is too limp. | 276 | 359 | 25 | 90 HB | 40 % IACS |
H02Default Half hard | Default stock condition: good balance of stiffness for stamped/blanked decorative parts with useful residual ductility. | 330 | 400 | 12 | 105 HB | 40 % IACS |
Three-quarter hard | Pick for flat stamped hardware needing higher yield strength with only light forming. | 359 | 435 | 8 | 118 HB | 40 % IACS |
Full hard | Pick for flat or lightly formed parts needing maximum strength with acceptable blanking behavior. | 400 | 462 | 5 | 130 HB | 39 % IACS |
Extra hard | Pick for stiff decorative strip, clips and light spring-like flat parts made without forming. | 448 | 517 | 4 | 145 HB | 39 % IACS |
H08This page Spring hard | Pick for flat springs, contacts and snap features where the gold color must be retained. | 483 | 552 | 3 | 155 HB | 38 % IACS |
Extra spring hard | Pick for the highest strength/stiffness available in this alloy; essentially no forming capability. | 503 | 579 | 3 | 162 HB | 38 % IACS |
What is C22600-H08?
C22600-H08 is C22600 supplied in the H08 condition — pick for flat springs, contacts and snap features where the gold color must be retained. C22600-H08 has a yield strength of 483 MPa (70.1 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 3% and the elastic modulus is 117 GPa (17 Msi). C22600-H08 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,005°C (1,841 °F). H02 is the default condition FabDigit quotes; H08 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 90/100, better than 99% of copper alloy grades
- High strength — 483 MPa (70.1 ksi), better than 88% of copper alloy grades
Limitations
- Limited ductility — 3%, worse than 97% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
C22600-H08 properties
Typical room-temperature values for C22600-H08; 12 are specific to this condition. Other listed values are C22600 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C22600-H08 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,005°C (1,841 °F).
Mechanical11
C22600-H08 has a yield strength of 483 MPa (70.1 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 88% of copper alloy grades. Elongation at break is 3% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C22600-H08 is rated for continuous service to 150°C (302 °F). It conducts heat at 172 W/m·K (99.4 BTU/hr·ft·°F), better than 74% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
C22600-H08 conducts electricity at 38 % IACS, better than 73% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C22600-H08 takes about 58 MJ of energy and emits 3.8 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 50%.
Manufacturability8
C22600-H08's machinability is fair (36/100, better than 55% of copper alloy grades); weldability good (55/100); formability poor (28/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C22600-H08
Is C22600 easy to machine?
Gummy, unleaded alpha brass — use sharp positive-rake tools, high speed, light feed and generous lubricant; expect roughly 30 % of free-cutting brass throughput.
Can C22600 be welded?
Solders and brazes superbly and resistance-welds well; fusion welding (GTAW) is only fair due to zinc fume/porosity, so mechanical or brazed joints are preferred.
Can C22600 be formed, bent or molded?
Excellent cold formability in O61/H01 — deep draws, coins, spins and stamps cleanly; interanneal near 425–650 °C and stress-relieve heavily worked parts to avoid ammonia SCC.
What surface finishes work on C22600?
Buffs to a bright warm-gold luster; not anodizable — protect with clear lacquer, or nickel/gold/rhodium electroplate, or chemically patinate for antique effects.
C22600 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 |
|---|---|---|
| CuCu may include Ag | 86 – 89 | 87.5 |
| Pbimpurity limit | ≤ 0.05 | — |
| Feimpurity limit | ≤ 0.05 | — |
| Zn | balance | — |
C22600-H08 — frequently asked
What is C22600-H08 used for?
C22600-H08 is typically used for jewelry, decorative hardware and name plates. In short: warm gold-tone brass; excellent deep-draw formability; poor machining rating.
What is the yield strength of C22600-H08?
C22600-H08 has a typical yield strength of 483 MPa (70.1 ksi) and a tensile strength of 552 MPa (80.1 ksi) — stronger than 88% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C22600-H08 easy to machine?
Not especially — machinability is rated fair (36/100, better than 55% of copper alloy grades). Gummy, unleaded alpha brass — use sharp positive-rake tools, high speed, light feed and generous lubricant; expect roughly 30 % of free-cutting brass throughput.
Can C22600-H08 be welded?
Yes — weldability is rated good (55/100). Solders and brazes superbly and resistance-welds well; fusion welding (GTAW) is only fair due to zinc fume/porosity, so mechanical or brazed joints are preferred.
What surface finishes work on C22600-H08?
Buffs to a bright warm-gold luster; not anodizable — protect with clear lacquer, or nickel/gold/rhodium electroplate, or chemically patinate for antique effects.
Can C22600-H08 be formed, bent or molded?
Excellent cold formability in O61/H01 — deep draws, coins, spins and stamps cleanly; interanneal near 425–650 °C and stress-relieve heavily worked parts to avoid ammonia SCC.
What is the maximum service temperature of C22600-H08?
C22600-H08 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 C22600-H02 and C22600-O61?
H02 is the default condition — default stock condition: good balance of stiffness for stamped/blanked decorative parts with useful residual ductility. O61: pick for deep drawing, coining, spinning and heavy bending of jewelry blanks. Yield strength is 330 MPa in H02 versus 100 MPa in O61.
Sources
- C22600 Jewelry Bronze alloy data (properties, tempers, fabrication ratings) — Copper Development Association (copper.org) (2023)
- ASTM B36/B36M — Brass Plate, Sheet, Strip and Rolled Bar — ASTM International (2018)
- ASTM B134/B134M — Brass Wire — ASTM International (2020)
- 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.