Copper Alloy C19800
UNS C19800
C19800 is a lightly alloyed wrought copper (C10000–C19999 family) with zinc, tin and magnesium additions that trade conductivity for strength, reaching 495 MPa yield and 520 MPa tensile at 82 HRB.
Reference datasheet — C19800 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 H04 condition
C19800 tempers and conditions
C19800 is supplied in 7 conditions, soft to hard. H04 is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick for deep drawing or severe forming where strength is added later by work hardening. | 140 | 320 | 32 | 40 HRB | 48 % IACS |
Quarter hard | Pick when forming severity is high but the annealed strength is insufficient. | 320 | 395 | 15 | 118 HB | 46 % IACS |
Half hard | Balanced temper: bends to tight radii in both grain directions while giving ~450 MPa strength. | 415 | 455 | 8 | 77 HRB | 45 % IACS |
H04Default Full hard | Default stocked strip temper for stamped connectors and terminals needing high contact force. | 495 | 520 | 4 | 82 HRB | 45 % IACS |
Mill hardened, full hard | Pick when improved stress-relaxation resistance and better bendability at similar strength are needed for under-hood connectors. | 510 | 530 | 6 | 160 HB | 47 % IACS |
Extra hard | Pick for flat springs and contacts where maximum strength matters and bends are gentle/lengthwise only. | 550 | 570 | 3 | 87 HRB | 44 % IACS |
Spring hard | Pick for thin spring contacts where the highest elastic limit is required and forming is minimal. | 595 | 615 | 2 | 11 HRC | 43 % IACS |
What is C19800?
C19800 is a lightly alloyed wrought copper (C10000–C19999 family) with zinc, tin and magnesium additions that trade conductivity for strength, reaching 495 MPa yield and 520 MPa tensile at 82 HRB. It is bought as thin strip for high-volume stamped and coined automotive terminals and connectors that need spring force with 45% IACS conductivity and 180 W/m·K thermal conductivity. Ductility is low (4% elongation) and service is limited to 150 °C, and machinability is poor at score 22. C19700 is the alternative where 80% IACS conductivity is required. C19800 has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 72% of copper alloy grades. It melts at 1,020°C (1,868 °F). C19800 has a yield strength of 495 MPa (71.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 89% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 120 GPa (17.4 Msi).
What is C19800 used for?
- automotive electrical terminals
- connectors
- battery clips
Advantages
- High strength — 495 MPa (71.8 ksi), better than 89% of copper alloy grades
- High electrical conductivity — 45 % IACS, better than 77% of copper alloy grades
- Conducts heat well — 180 W/m·K (104 BTU/hr·ft·°F), better than 75% of copper alloy grades
Limitations
- Limited ductility — 4%, worse than 96% of copper alloy grades
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Difficult to machine — 22/100, worse than 94% of copper alloy grades
C19800 properties
Typical room-temperature values for C19800-H04; bars are the position among copper alloy grades.
Physical3
C19800 has a density of 8.89 g/cm³ (0.321 lb/in³), heavier than 72% of copper alloy grades. It melts at 1,020°C (1,868 °F).
Mechanical11
C19800 has a yield strength of 495 MPa (71.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 89% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 120 GPa (17.4 Msi).
Thermal6
C19800 is rated for continuous service to 150°C (302 °F). It conducts heat at 180 W/m·K (104 BTU/hr·ft·°F), better than 75% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C19800 conducts electricity at 45 % IACS, better than 77% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C19800 takes about 58 MJ of energy and emits 3.8 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 35%.
Manufacturability7
C19800's machinability is poor (22/100, worse than 94% of copper alloy grades); weldability fair (45/100); formability fair (45/100).
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. C19800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C19800
Is C19800 easy to machine?
Gummy and low-rated (~20 % of AISI 1212); use sharp positive-rake tools, high speed, generous coolant — stamping and coining are the normal shaping routes, not turning.
Can C19800 be welded?
Resistance and laser welding of thin strip are practical; any fusion process locally anneals the cold-worked temper, and Mg/Zn loss can cause porosity, so soldering or crimping is preferred.
Can C19800 be formed, bent or molded?
Excellent progressive-die stamping stock; H04 typically bends 90° at ~1t good-way and ~2t bad-way, so orient tight bends to the rolling direction and specify TM tempers for severe forms.
C19800 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 |
|---|---|---|
| Snsolid-solution strengthener | 0.6 – 1.2 | 0.9 |
| Znimproves stress-relaxation and solderability | 0.4 – 1 | 0.7 |
| Mgdeoxidiser / relaxation resistance | 0.03 – 0.15 | 0.08 |
| Presidual deoxidiser | 0 – 0.05 | 0.02 |
| Feimpurity limit | ≤ 0.05 | |
| Pbimpurity limit | ≤ 0.02 | |
| Cubalance, Cu + named elements ≥ 99.8 % | balance |
What surface finishes work on C19800?
Not anodisable — standard finishes are hot-dip or reflow tin, tin-lead, nickel underplate with gold or silver on contact zones; solderability is excellent after light acid cleaning.
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).
How much does C19800 cost?
C19800 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.
C19800 — frequently asked
What is C19800 used for?
C19800 is typically used for automotive electrical terminals, connectors and battery clips. In short: high-strength connector copper; 495 MPa yield, 45% IACS; stamping-grade strip alloy.
What is the yield strength of C19800?
C19800 has a typical yield strength of 495 MPa (71.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 89% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C19800 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Gummy and low-rated (~20 % of AISI 1212); use sharp positive-rake tools, high speed, generous coolant — stamping and coining are the normal shaping routes, not turning.
Can C19800 be welded?
With care — weldability is rated fair (45/100). Resistance and laser welding of thin strip are practical; any fusion process locally anneals the cold-worked temper, and Mg/Zn loss can cause porosity, so soldering or crimping is preferred.
What surface finishes work on C19800?
Not anodisable — standard finishes are hot-dip or reflow tin, tin-lead, nickel underplate with gold or silver on contact zones; solderability is excellent after light acid cleaning.
Can C19800 be formed, bent or molded?
Excellent progressive-die stamping stock; H04 typically bends 90° at ~1t good-way and ~2t bad-way, so orient tight bends to the rolling direction and specify TM tempers for severe forms.
What is the maximum service temperature of C19800?
C19800 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C19800-H04 and C19800-O60?
H04 is the default condition — default stocked strip temper for stamped connectors and terminals needing high contact force. O60: pick for deep drawing or severe forming where strength is added later by work hardening. Yield strength is 495 MPa in H04 versus 140 MPa in O60.
How much does C19800 cost?
C19800 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 B888 / B465 — copper alloy strip for electrical connectors (temper definitions) — ASTM International (2021)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM International (2019)
- CDA UNS Copper Alloy Registration (C19xxx dilute copper alloys) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (copper alloys) — ASM International (2005)
- High-performance copper connector strip datasheets (Wieland / KME / Ningbo Xingye class products) — various producers (2023)
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.