Copper Alloy C19500-H01
Supply condition
UNS C19500
H01 = quarter hard
Light cold work when tight forming is still needed but annealed strength is too low.
Values for the H01 condition
Other C19500 tempers and conditions
C19500 is listed in 7 conditions; see the grade overview at C19500.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Maximum formability for deep drawing or severe bending before hardening/aging. | 170 | 400 | 24 | 55 HRB | 45 % IACS |
H01This page Quarter hard | Light cold work when tight forming is still needed but annealed strength is too low. | 440 | 483 | 9 | 74 HRB | 50 % IACS |
Solution heat treated and precipitation hardened | Choose when both good formability and high conductivity with stable strength after forming are required — aging restores conductivity and stress-relaxation resistance. | 470 | 540 | 10 | 78 HRB | 55 % IACS |
H02Default Half hard | Standard stocked strip temper: balanced strength, bendability and 50% IACS for terminals and lead frames. | 517 | 552 | 5 | 80 HRB | 50 % IACS |
Three-quarter hard | Higher strength for stamped contacts with only gentle bends. | 552 | 586 | 4 | 84 HRB | 50 % IACS |
Full hard | High-strength strip for flat springs and contacts formed with generous bend radii. | 586 | 621 | 3 | 88 HRB | 50 % IACS |
Spring hard | Maximum as-rolled strength for spring contacts; bends must be along favourable grain direction. | 640 | 670 | 2 | 92 HRB | 50 % IACS |
What is C19500-H01?
C19500-H01 is C19500 supplied in the H01 condition — light cold work when tight forming is still needed but annealed strength is too low. C19500-H01 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 483 MPa (70.1 ksi) — stronger than 85% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 131 GPa (19 Msi). C19500-H01 has a density of 8.78 g/cm³ (0.317 lb/in³), heavier than 53% of copper alloy grades. It melts at 1,030°C (1,886 °F). H02 is the default condition FabDigit quotes; H01 is available on request or by drawing note.
Advantages
- Stiff — 131 GPa (19 Msi), better than 91% of copper alloy grades
- High strength — 440 MPa (63.8 ksi), better than 85% of copper alloy grades
- Forms and bends easily — 70/100, better than 80% of copper alloy grades
- High electrical conductivity — 50 % IACS, better than 79% of copper alloy grades
- Conducts heat well — 200 W/m·K (115.6 BTU/hr·ft·°F), better than 78% of copper alloy grades
Limitations
- Limited ductility — 9%, worse than 79% of copper alloy grades
C19500-H01 properties
Typical room-temperature values for C19500-H01; 11 are specific to this condition. Other listed values are C19500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C19500-H01 has a density of 8.78 g/cm³ (0.317 lb/in³), heavier than 53% of copper alloy grades. It melts at 1,030°C (1,886 °F).
Mechanical11
C19500-H01 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 483 MPa (70.1 ksi) — stronger than 85% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 131 GPa (19 Msi).
Thermal6
C19500-H01 is rated for continuous service to 200°C (392 °F). It conducts heat at 200 W/m·K (115.6 BTU/hr·ft·°F), better than 78% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
C19500-H01 conducts electricity at 50 % IACS, better than 79% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C19500-H01 takes about 53 MJ of energy and emits 3.6 kg of CO₂ — less than 85% of copper alloy grades. Typical recycled content is 40%.
Manufacturability7
C19500-H01's machinability is poor (27/100, worse than 81% of copper alloy grades); weldability fair (40/100); formability very good (70/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C19500-H01
Is C19500 easy to machine?
Gummy like most high-conductivity coppers (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant; stamping and blanking are the normal routes.
Can C19500 be welded?
Resistance and laser welding are practical; fusion welding is poor due to high conductivity and risk of overaging/softening in the HAZ.
Can C19500 be formed, bent or molded?
Excellent progressive-die stamping in O60–H02; in H04/H08 keep bend radii ≥1–2t and bend transverse to rolling direction; stress-relieve/age after forming to restore relaxation resistance.
What surface finishes work on C19500?
Solders and brazes readily; commonly tin-, nickel-, silver- or gold-plated for contacts; not anodizable — passivate or plate to prevent tarnish.
C19500 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 |
|---|---|---|
| Fe | 1 – 2 | 1.5 |
| Co | 0.3 – 1.3 | 0.8 |
| Sn | 0.1 – 1 | 0.6 |
| P | 0.01 – 0.35 | 0.05 |
| Zn | ≤ 0.2 | — |
| Pb | ≤ 0.02 | — |
| Curemainder, ≈96 % min including Ag | balance | — |
C19500-H01 — frequently asked
What is C19500-H01 used for?
C19500-H01 is typically used for electrical connectors, switch and relay parts and wear-resistant electrical contacts. In short: age-hardenable contact alloy; 517 MPa yield at 50 % IACS; highest wear resistance in family.
What is the yield strength of C19500-H01?
C19500-H01 has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 483 MPa (70.1 ksi) — stronger than 85% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C19500-H01 easy to machine?
Not especially — machinability is rated poor (27/100, worse than 81% of copper alloy grades). Gummy like most high-conductivity coppers (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant; stamping and blanking are the normal routes.
Can C19500-H01 be welded?
With care — weldability is rated fair (40/100). Resistance and laser welding are practical; fusion welding is poor due to high conductivity and risk of overaging/softening in the HAZ.
What surface finishes work on C19500-H01?
Solders and brazes readily; commonly tin-, nickel-, silver- or gold-plated for contacts; not anodizable — passivate or plate to prevent tarnish.
Can C19500-H01 be formed, bent or molded?
Excellent progressive-die stamping in O60–H02; in H04/H08 keep bend radii ≥1–2t and bend transverse to rolling direction; stress-relieve/age after forming to restore relaxation resistance.
What is the maximum service temperature of C19500-H01?
C19500-H01 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C19500-H02 and C19500-O60?
H02 is the default condition — standard stocked strip temper: balanced strength, bendability and 50% IACS for terminals and lead frames. O60: maximum formability for deep drawing or severe bending before hardening/aging. Yield strength is 517 MPa in H02 versus 170 MPa in O60.
Sources
- ASTM B465 / B888 (Cu-Fe alloy strip and lead-frame strip) — ASTM International (2019)
- CDA Alloy Database — C19500 property sheet — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- High-performance copper strip for connectors and lead frames — Copper strip producers (Wieland / Olin-Brass class data) (2022)
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.