Copper Alloy C75200-H01
Supply condition
UNS C75200 · EN CW409J
H01 = quarter hard
Best compromise when parts still need moderate bending or drawing but require more stiffness than annealed strip.
Values for the H01 condition
Other C75200 tempers and conditions
C75200 is listed in 9 conditions; see the grade overview at C75200.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose for deep drawing, spinning and severe forming of flatware and instrument parts before final work-hardening. | 172 | 400 | 40 | 100 HB | 6 % IACS |
As hot rolled | Pick for hot-rolled plate/bar stock that will be machined or subsequently cold-finished; softest commercial mill condition. | 180 | 407 | 37 | 102 HB | — |
Annealed to 0.035 mm grain size | Grain-size-controlled soft strip for consistent draw/stamp behaviour and a fine, streak-free polished surface. | 190 | 414 | 38 | 107 HB | 6 % IACS |
H01This page Quarter hard | Best compromise when parts still need moderate bending or drawing but require more stiffness than annealed strip. | 310 | 448 | 15 | 133 HB | — |
H02Default Half hard | The default stocked strip/sheet temper: enough strength for flatware, escutcheons and hardware while still allowing gentle forming. | 427 | 517 | 6 | 160 HB | — |
Full hard | Use where flatness, edge stiffness and wear resistance matter — knife handles, trim strips, blanked contacts with only gentle bends. | 517 | 586 | 3 | 177 HB | — |
Extra hard | For high-strength flat parts and light springs where only very small-radius bends parallel to rolling are needed. | 586 | 655 | 2 | 188 HB | — |
Spring hard | Select for flat springs, clips, reed/valve parts and connector contacts needing high elastic limit with non-magnetic behaviour. | 640 | 700 | 2 | 198 HB | — |
Extra spring hard | Maximum cold-worked strength for thin strip springs and shims; essentially no bending capability across the grain. | 690 | 758 | 1 | 18 HRC | 5.5 % IACS |
What is C75200-H01?
C75200-H01 is C75200 supplied in the H01 condition — best compromise when parts still need moderate bending or drawing but require more stiffness than annealed strip. C75200-H01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 125 GPa (18.1 Msi). C75200-H01 has a density of 8.73 g/cm³ (0.315 lb/in³), lighter than 53% of copper alloy grades. It melts at 1,021°C (1,870 °F). H02 is the default condition FabDigit quotes; H01 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 92/100, better than 100% of copper alloy grades
- Forms and bends easily — 68/100, better than 79% of copper alloy grades
Limitations
- Low electrical conductivity — 6 % IACS, worse than 93% of copper alloy grades
- High embodied carbon — 5.6 kg CO₂/kg, worse than 91% of copper alloy grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades
C75200-H01 properties
Typical room-temperature values for C75200-H01; 13 are specific to this condition. Other listed values are C75200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C75200-H01 has a density of 8.73 g/cm³ (0.315 lb/in³), lighter than 53% of copper alloy grades. It melts at 1,021°C (1,870 °F).
Mechanical12
C75200-H01 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 125 GPa (18.1 Msi).
Thermal6
C75200-H01 is rated for continuous service to 220°C (428 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C75200-H01 conducts electricity at 6 % IACS, worse than 93% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C75200-H01 takes about 82 MJ of energy and emits 5.6 kg of CO₂ — more than 91% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C75200-H01's machinability is poor (26/100, worse than 81% of copper alloy grades); weldability fair (45/100); formability good (68/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C75200-H01
Is C75200 easy to machine?
Gummy and abrasive on tooling — rating ~20 % of free-cutting brass; use sharp positive-rake carbide, high speed, low feed and generous coolant, or switch to leaded C79200 for screw-machine work.
Can C75200 be welded?
Solders and silver-brazes excellently; resistance and GTAW welding are workable with low heat input and matching Cu-Ni filler, but zinc fuming, hot-shortness and post-weld colour mismatch limit fusion welding.
Can C75200 be formed, bent or molded?
Anneal at 600–750 °C for deep drawing/spinning; work-hardens fast, so plan interstage anneals and stress-relieve cold-worked parts (~250 °C) to avoid ammonia-related stress-corrosion cracking.
What surface finishes work on C75200?
Polishes to a bright silver-white lustre and takes silver, nickel or chrome plating readily; lacquer or plate for tarnish protection — it cannot be anodized.
C75200 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 + named elements ≥ 99.5 % | 63.5 – 66.5 | 65 |
| NiNi + Co | 16.5 – 19.5 | 18 |
| Pb | ≤ 0.05 | — |
| Fe | ≤ 0.25 | — |
| Mn | ≤ 0.5 | — |
| Zn | balance | — |
C75200-H01 — frequently asked
What is C75200-H01 used for?
C75200-H01 is typically used for flatware and cutlery, musical instrument fittings, zippers, coinage blanks and optical frames. In short: whitest nickel silver; highest-nickel 65-18 grade; flatware-grade appearance.
What is the yield strength of C75200-H01?
C75200-H01 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 448 MPa (65 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C75200-H01 easy to machine?
Not especially — machinability is rated poor (26/100, worse than 81% of copper alloy grades). Gummy and abrasive on tooling — rating ~20 % of free-cutting brass; use sharp positive-rake carbide, high speed, low feed and generous coolant, or switch to leaded C79200 for screw-machine work.
Can C75200-H01 be welded?
With care — weldability is rated fair (45/100). Solders and silver-brazes excellently; resistance and GTAW welding are workable with low heat input and matching Cu-Ni filler, but zinc fuming, hot-shortness and post-weld colour mismatch limit fusion welding.
What surface finishes work on C75200-H01?
Polishes to a bright silver-white lustre and takes silver, nickel or chrome plating readily; lacquer or plate for tarnish protection — it cannot be anodized.
Can C75200-H01 be formed, bent or molded?
Anneal at 600–750 °C for deep drawing/spinning; work-hardens fast, so plan interstage anneals and stress-relieve cold-worked parts (~250 °C) to avoid ammonia-related stress-corrosion cracking.
What is the maximum service temperature of C75200-H01?
C75200-H01 is rated for continuous use to about 220°C (428 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C75200-H02 and C75200-H10?
H02 is the default condition — the default stocked strip/sheet temper: enough strength for flatware, escutcheons and hardware while still allowing gentle forming. H10: maximum cold-worked strength for thin strip springs and shims; essentially no bending capability across the grain. Yield strength is 427 MPa in H02 versus 690 MPa in H10.
Sources
- ASTM B122/B122M — Copper-Nickel-Zinc (Nickel Silver) 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 Alloy C75200 property datasheet — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- EN 12163 / CW409J (CuNi18Zn20) wrought nickel silver — CEN (2016)
- GB/T 2059 / GB/T 2040 (BZn18-17) — SAC (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.