Copper Alloy C75400-H00
Supply condition
UNS C75400
H00 = 1/8 hard
Slightly stiffened strip for parts needing flatness and moderate bending without full annealed softness.
Values for the H00 condition
Other C75400 tempers and conditions
C75400 is listed in 10 conditions; see the grade overview at C75400.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed to 0.070 mm grain size | Softest commercial anneal — pick for deep drawing, spinning and severe bending of decorative parts. | 120 | 360 | 42 | 70 HB | — |
Annealed to 0.035 mm grain size | General-purpose anneal balancing formability with a fine surface after forming; common etching and stamping stock. | 145 | 380 | 40 | 78 HB | — |
Annealed to 0.025 mm grain size | Fine-grain anneal for moderate forming with smooth (orange-peel-free) polished and etched surfaces. | 165 | 395 | 37 | 85 HB | — |
Annealed to 0.015 mm grain size | Finest anneal — choose for shallow forming plus best etched detail and mirror polish on thin strip. | 190 | 415 | 32 | 95 HB | — |
H00This page 1/8 hard | Slightly stiffened strip for parts needing flatness and moderate bending without full annealed softness. | 260 | 430 | 25 | 105 HB | — |
Quarter hard | Standard temper for etched nameplates and formed hardware needing some spring-back control. | 320 | 460 | 20 | 118 HB | — |
H02Default Half hard | Most stocked temper — good strength with enough ductility for 90° bends in quality hardware and trim. | 425 | 515 | 12 | 140 HB | — |
Full hard | Full-hard strip for flat springs, contacts and stiff formed sections with only gentle bends. | 510 | 585 | 5 | 165 HB | — |
Extra hard | Extra-hard temper for high-stiffness spring contacts and shear-cut flat parts; bending must follow the rolling-grain rule. | 570 | 640 | 3 | 185 HB | — |
Spring hard | Spring temper strip for flat springs and diaphragms where maximum elastic limit is needed; stress-relieve after forming. | 605 | 675 | 2 | 12 HRC | 6.3 % IACS |
What is C75400-H00?
C75400-H00 is C75400 supplied in the H00 condition — slightly stiffened strip for parts needing flatness and moderate bending without full annealed softness. C75400-H00 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 55% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 125 GPa (18.1 Msi). C75400-H00 has a density of 8.72 g/cm³ (0.315 lb/in³), lighter than 54% of copper alloy grades. It melts at 1,021°C (1,870 °F). H02 is the default condition FabDigit quotes; H00 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 88/100, better than 97% of copper alloy grades
- Forms and bends easily — 72/100, better than 82% of copper alloy grades
Limitations
- Low electrical conductivity — 6.5 % IACS, worse than 91% of copper alloy grades
- High embodied carbon — 5.2 kg CO₂/kg, worse than 88% of copper alloy grades
- Poor heat conductor — 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 85% of copper alloy grades
C75400-H00 properties
Typical room-temperature values for C75400-H00; 10 are specific to this condition. Other listed values are C75400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C75400-H00 has a density of 8.72 g/cm³ (0.315 lb/in³), lighter than 54% of copper alloy grades. It melts at 1,021°C (1,870 °F).
Mechanical12
C75400-H00 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 55% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 125 GPa (18.1 Msi).
Thermal5
C75400-H00 is rated for continuous service to 230°C (446 °F). It conducts heat at 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 85% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C75400-H00 conducts electricity at 6.5 % IACS, worse than 91% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 64% of copper alloy grades.
Sustainability4
Producing a kilogram of C75400-H00 takes about 78 MJ of energy and emits 5.2 kg of CO₂ — more than 90% of copper alloy grades. Typical recycled content is 40%.
Manufacturability7
C75400-H00's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (45/100); formability very good (72/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C75400-H00
Is C75400 easy to machine?
Gummy and abrasive — rating ~20 % of free-cutting brass; use sharp positive-rake carbide, high speed with light feeds and generous soluble-oil coolant.
Can C75400 be welded?
Solders and brazes readily and resistance-welds well; fusion welding is fair at best due to zinc fuming — prefer GTAW with matched Cu-Ni filler and good extraction.
Can C75400 be formed, bent or molded?
Excellent cold formability in OS tempers (deep draw, spin, coin); interanneal 600–750 °C between severe draws and stress-relieve cold-worked parts near 260 °C to avoid ammonia SCC.
What surface finishes work on C75400?
Polishes to a bright silver-white finish; ideal for photochemical etching, bright/electroless nickel, silver or chrome plating, and clear lacquer for tarnish control (not anodizable).
C75400 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 |
|---|---|---|
| Cu | 63.5 – 66.5 | 65 |
| Niincludes Co | 14 – 16 | 15 |
| Mn | ≤ 0.5 | — |
| Fe | ≤ 0.25 | — |
| Pb | ≤ 0.1 | — |
| Znremainder, nominally ~20 % | balance | — |
C75400-H00 — frequently asked
What is C75400-H00 used for?
C75400-H00 is typically used for etching plates, hardware fittings, musical instrument parts and decorative trim. In short: balanced whiteness and formability; preferred etching stock; mid-nickel strip grade.
What is the yield strength of C75400-H00?
C75400-H00 has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 55% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C75400-H00 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy and abrasive — rating ~20 % of free-cutting brass; use sharp positive-rake carbide, high speed with light feeds and generous soluble-oil coolant.
Can C75400-H00 be welded?
With care — weldability is rated fair (45/100). Solders and brazes readily and resistance-welds well; fusion welding is fair at best due to zinc fuming — prefer GTAW with matched Cu-Ni filler and good extraction.
What surface finishes work on C75400-H00?
Polishes to a bright silver-white finish; ideal for photochemical etching, bright/electroless nickel, silver or chrome plating, and clear lacquer for tarnish control (not anodizable).
Can C75400-H00 be formed, bent or molded?
Excellent cold formability in OS tempers (deep draw, spin, coin); interanneal 600–750 °C between severe draws and stress-relieve cold-worked parts near 260 °C to avoid ammonia SCC.
What is the maximum service temperature of C75400-H00?
C75400-H00 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C75400-H02 and C75400-OS070?
H02 is the default condition — most stocked temper — good strength with enough ductility for 90° bends in quality hardware and trim. OS070: softest commercial anneal — pick for deep drawing, spinning and severe bending of decorative parts. Yield strength is 425 MPa in H02 versus 120 MPa in OS070.
Sources
- ASTM B122/B122M — Copper-Nickel-Tin, Copper-Nickel-Zinc Plate, Sheet, Strip and Rolled Bar — ASTM International (2022)
- ASTM B151/B151M — Copper-Nickel-Zinc and Copper-Nickel Rod and Bar — ASTM International (2021)
- CDA Standard Designation & Properties Database, alloy C75400 — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (nickel silvers) — ASM International (1990)
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.