Copper Alloy C19410-H04
Supply condition
UNS C19410
H04 = full hard
Standard temper for high-speed stamped contacts and lead frames needing higher yield and flat-part stiffness.
Values for the H04 condition
Other C19410 tempers and conditions
C19410 is listed in 9 conditions; see the grade overview at C19410.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick for deep drawing, severe forming or when maximum conductivity and ductility matter more than strength. | 130 | 310 | 32 | 66 HB | 65 % IACS |
1/8 hard | Light temper for parts needing tight bends with slightly higher strength than annealed. | 240 | 340 | 20 | 90 HB | 64 % IACS |
Quarter hard | Balanced temper for stamped shields and terminals with 90° bends transverse and longitudinal. | 305 | 365 | 14 | 104 HB | 63 % IACS |
H02Default Half hard | Most widely stocked lead-frame / connector strip temper: good stamping and bend performance at ~415 MPa. | 370 | 415 | 8 | 118 HB | 62 % IACS |
H04 + stress relieved | Use when flatness after stamping and improved stress-relaxation resistance at 100–150 °C are required. | 410 | 440 | 7 | 128 HB | 63 % IACS |
H04This page Full hard | Standard temper for high-speed stamped contacts and lead frames needing higher yield and flat-part stiffness. | 420 | 450 | 5 | 132 HB | 61 % IACS |
Extra hard | For flat springs and contacts where higher yield and stress-relaxation resistance are needed and bends are shallow. | 455 | 480 | 3 | 140 HB | 61 % IACS |
Spring hard | Spring temper strip for contact fingers; bending must follow the rolling direction, expect springback. | 490 | 510 | 2 | 146 HB | 60 % IACS |
Extra spring hard | Maximum cold-rolled strength for thin spring contacts; very limited formability. | 520 | 540 | 2 | 152 HB | 60 % IACS |
What is C19410-H04?
C19410-H04 is C19410 supplied in the H04 condition — standard temper for high-speed stamped contacts and lead frames needing higher yield and flat-part stiffness. C19410-H04 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 83% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 122 GPa (17.7 Msi). C19410-H04 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,085°C (1,985 °F). H02 is the default condition FabDigit quotes; H04 is available on request or by drawing note.
Advantages
- High strength — 420 MPa (60.9 ksi), better than 83% of copper alloy grades
- Conducts heat well — 255 W/m·K (147.3 BTU/hr·ft·°F), better than 82% of copper alloy grades
- High electrical conductivity — 61 % IACS, better than 82% of copper alloy grades
Limitations
- Limited ductility — 5%, worse than 93% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
C19410-H04 properties
Typical room-temperature values for C19410-H04; 19 are specific to this condition. Other listed values are C19410 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C19410-H04 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,085°C (1,985 °F).
Mechanical13
C19410-H04 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 83% of copper alloy grades. Elongation at break is 5% and the elastic modulus is 122 GPa (17.7 Msi).
Thermal6
C19410-H04 is rated for continuous service to 180°C (356 °F). It conducts heat at 255 W/m·K (147.3 BTU/hr·ft·°F), better than 82% of copper alloy grades. Thermal expansion is 16.6 µm/m·K (9.22 µin/in·°F).
Electrical3
C19410-H04 conducts electricity at 61 % IACS, better than 82% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of C19410-H04 takes about 62 MJ of energy and emits 3.8 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 35%.
Manufacturability7
C19410-H04's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability fair (50/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C19410-H04
Is C19410 easy to machine?
Poor chip-breaking, gummy like most high-copper alloys (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, flood coolant; prefer stamping/etching over milling.
Can C19410 be welded?
Resistance and laser welding are practical on thin strip; fusion welding with filler is rarely used because heat softens the cold-worked temper — soldering and brazing are the normal joining routes.
Can C19410 be formed, bent or molded?
Excellent progressive-die stamping stock; specify H01/H02 for 90° bends across the rolling direction and H06–H10 only for shallow forms, allowing for springback.
What surface finishes work on C19410?
Not anodizable; standard finishes are hot-dip/reflow tin, matte tin, nickel underplate with Ag/Au flash for contacts, and it can be bright-rolled or chemically brightened.
C19410 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 |
|---|---|---|
| Fedispersed Fe-rich phase gives strength and softening resistance | 1.8 – 2.3 | 2.05 |
| Prange per CDA registration; verify against mill certificate | 0.05 – 0.2 | 0.12 |
| ZnZn addition aids solder/tin-plate behaviour | 0.05 – 0.2 | 0.12 |
| Pbimpurity limit | ≤ 0.03 | — |
| Curemainder, Cu + named elements ≥ 99.5 % | ≥ 97 (balance) | — |
C19410-H04 — frequently asked
What is C19410-H04 used for?
C19410-H04 is typically used for lead frames, connector terminals, fuse clips and switch contacts. In short: solderable connector strip; zinc-modified C19400 variant; strength over conductivity.
What is the yield strength of C19410-H04?
C19410-H04 has a typical yield strength of 420 MPa (60.9 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 83% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C19410-H04 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Poor chip-breaking, gummy like most high-copper alloys (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, flood coolant; prefer stamping/etching over milling.
Can C19410-H04 be welded?
With care — weldability is rated fair (50/100). Resistance and laser welding are practical on thin strip; fusion welding with filler is rarely used because heat softens the cold-worked temper — soldering and brazing are the normal joining routes.
What surface finishes work on C19410-H04?
Not anodizable; standard finishes are hot-dip/reflow tin, matte tin, nickel underplate with Ag/Au flash for contacts, and it can be bright-rolled or chemically brightened.
Can C19410-H04 be formed, bent or molded?
Excellent progressive-die stamping stock; specify H01/H02 for 90° bends across the rolling direction and H06–H10 only for shallow forms, allowing for springback.
What is the maximum service temperature of C19410-H04?
C19410-H04 is rated for continuous use to about 180°C (356 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C19410-H02 and C19410-O60?
H02 is the default condition — most widely stocked lead-frame / connector strip temper: good stamping and bend performance at ~415 MPa. O60: pick for deep drawing, severe forming or when maximum conductivity and ductility matter more than strength. Yield strength is 370 MPa in H02 versus 130 MPa in O60.
Sources
- ASTM B465 — Copper-Iron Alloy Plate, Sheet, Strip and Rolled Bar — ASTM International (2020)
- CDA Alloy Database — C19400/C19410 high-copper iron alloys — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- High-performance copper strip for lead frames and connectors (194-type) — Copper strip producers (e.g. Wieland, Olin/Global Brass, Ningbo Xingye) (2023)
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.