Copper Alloy C19400
UNS C19400 · ASTM B465 · EN CW107C, CuFe2P · JIS C1940
C19400 (CuFe2P, CW107C, C1940, ASTM B465) is an iron- and phosphorus-bearing copper that combines improved strength and stress-relaxation resistance with the stamping formability needed for lead frames and connectors.
Reference datasheet — C19400 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the H02 condition
C19400 tempers and conditions
C19400 is supplied in 10 conditions, soft to hard. H02 is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Maximum ductility for deep drawing and severe forming; lowest strength. | 145 | 315 | 32 | 40 HRB | 65 % IACS |
Light annealed | Partially recrystallised, fine grain: good formability with a useful strength floor and flat strip. | 190 | 340 | 25 | 82 HB | 65 % IACS |
Quarter hard | Intermediate temper when forming severity is still high but annealed strength is insufficient. | 290 | 380 | 16 | 100 HB | 65 % IACS |
Annealed to temper, half hard | Half-hard strength level reached by controlled anneal rather than final rolling — better flatness and more uniform bend behaviour than rolled H02. | 330 | 415 | 14 | 112 HB | 65 % IACS |
H02Default Half hard | Default stocking temper for lead frames and stamped terminals: balanced strength, bendability and conductivity. | 370 | 420 | 10 | 63 HRB | 65 % IACS |
Full hard | Higher strength for terminals and shields with mild bends only (bend radius ≥ 1t across grain). | 420 | 455 | 6 | 68 HRB | 64 % IACS |
Extra hard | For flat parts and gentle forms needing higher contact force and stress-relaxation resistance. | 460 | 490 | 4 | 136 HB | 64 % IACS |
Spring hard | Spring temper for contact springs where high yield and low relaxation matter more than bend severity. | 495 | 520 | 3 | 144 HB | 63 % IACS |
Extra spring hard | Near-maximum cold work for flat springs and stiff terminals; bends must be with-grain and generous. | 530 | 550 | 2.5 | 152 HB | 63 % IACS |
Strain hardened, half hard | Highest commercially rolled strength for C19400 — flat, blanked or lightly formed spring parts only. | 565 | 585 | 2 | 163 HB | 62 % IACS |
What is C19400?
C19400 (CuFe2P, CW107C, C1940, ASTM B465) is an iron- and phosphorus-bearing copper that combines improved strength and stress-relaxation resistance with the stamping formability needed for lead frames and connectors. The default condition gives 370 MPa yield, 420 MPa tensile, 10 % elongation and 63 HRB at 65 % IACS and 260 W/m·K — the highest conductivity in this group — in tempers O60 through H14. Service is limited to 200 °C and machinability is low at 30, so parts are stamped rather than cut; C19500 is the higher-strength alternative when spring force matters more than conductivity. C19400 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,080°C (1,976 °F). C19400 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 121 GPa (17.5 Msi).
What is C19400 used for?
- lead frames
- electronic connectors
- relay and switch parts
- terminals
Advantages
- Conducts heat well — 260 W/m·K (150.2 BTU/hr·ft·°F), better than 82% of copper alloy grades
- High electrical conductivity — 65 % IACS, better than 82% of copper alloy grades
- High strength — 370 MPa (53.7 ksi), better than 75% of copper alloy grades
Limitations
- Limited ductility — 10%, worse than 76% of copper alloy grades
C19400 properties
Typical room-temperature values for C19400-H02; bars are the position among copper alloy grades.
Physical3
C19400 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,080°C (1,976 °F).
Mechanical12
C19400 has a yield strength of 370 MPa (53.7 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 121 GPa (17.5 Msi).
Thermal6
C19400 is rated for continuous service to 200°C (392 °F). It conducts heat at 260 W/m·K (150.2 BTU/hr·ft·°F), better than 82% of copper alloy grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
C19400 conducts electricity at 65 % 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 C19400 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 35%.
Manufacturability8
C19400's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability fair (45/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C19400 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C19400
Is C19400 easy to machine?
Gummy and low machinability (~20 % of free-cutting brass): use sharp positive-rake tools, high speed, generous coolant; stamping/blanking is far more economical than chip cutting.
Can C19400 be welded?
Resistance and laser spot welding are routine; fusion welding is fair — the heat-affected zone recrystallises and loses cold-worked strength, so soldering/brazing is usually preferred.
Can C19400 be formed, bent or molded?
Excellent progressive-die stamping and bending in O/H01/H02; for H06 and harder keep bends with-grain and use radii ≥ 2t to avoid edge cracking.
C19400 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 precipitates provide strengthening | 2.1 – 2.6 | 2.35 |
| P | 0.02 – 0.15 | 0.03 |
| Znimproves solder-joint/thermal stability | 0.05 – 0.2 | 0.12 |
| Pb | ≤ 0.03 | |
| CuCu + named elements ≥ 99.8 %; Cu ≈ 97.0–97.8 % (Ag counted as Cu) | balance |
What surface finishes work on C19400?
Not anodizable; takes bright electroplated or electroless Sn, Ag, Ni and Ni/Pd/Au finishes well, and forms an adherent oxide for good epoxy mold-compound adhesion in lead frames.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C19400 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B465
- EN / DIN / Werkstoff-Nr.
- CW107CCuFe2P
- JIS
- C1940
How much does C19400 cost?
C19400 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C19400 — frequently asked
What is C19400 used for?
C19400 is typically used for lead frames, electronic connectors, relay and switch parts and terminals. In short: standard lead-frame copper; 65 % IACS, 260 W/m·K; excellent stamping formability.
What is the yield strength of C19400?
C19400 has a typical yield strength of 370 MPa (53.7 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 75% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C19400 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy and low machinability (~20 % of free-cutting brass): use sharp positive-rake tools, high speed, generous coolant; stamping/blanking is far more economical than chip cutting.
Can C19400 be welded?
With care — weldability is rated fair (45/100). Resistance and laser spot welding are routine; fusion welding is fair — the heat-affected zone recrystallises and loses cold-worked strength, so soldering/brazing is usually preferred.
What surface finishes work on C19400?
Not anodizable; takes bright electroplated or electroless Sn, Ag, Ni and Ni/Pd/Au finishes well, and forms an adherent oxide for good epoxy mold-compound adhesion in lead frames.
Can C19400 be formed, bent or molded?
Excellent progressive-die stamping and bending in O/H01/H02; for H06 and harder keep bends with-grain and use radii ≥ 2t to avoid edge cracking.
What is the maximum service temperature of C19400?
C19400 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 C19400-H02 and C19400-O60?
H02 is the default condition — default stocking temper for lead frames and stamped terminals: balanced strength, bendability and conductivity. O60: maximum ductility for deep drawing and severe forming; lowest strength. Yield strength is 370 MPa in H02 versus 145 MPa in O60.
How much does C19400 cost?
C19400 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B465 — Copper-Iron Alloy Plate, Sheet, Strip and Rolled Bar — ASTM International (2020)
- EN 1652 / CW107C (CuFe2P) wrought copper alloys — CEN (1998)
- CDA Alloy C19400 property sheet — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Lead-frame copper strip (CuFe2P) mill datasheet — strip mill (Olin/Wieland-class) (2022)
- GB/T 2059 / GB/T 2040 — SAC (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.