Copper Alloy C19800-H08
Supply condition
UNS C19800
H08 = spring hard
Pick for thin spring contacts where the highest elastic limit is required and forming is minimal.
Values for the H08 condition
Other C19800 tempers and conditions
C19800 is listed in 7 conditions; see the grade overview at C19800.
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 |
H08This page 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-H08?
C19800-H08 is C19800 supplied in the H08 condition — pick for thin spring contacts where the highest elastic limit is required and forming is minimal. C19800-H08 has a yield strength of 595 MPa (86.3 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 94% of copper alloy grades. Elongation at break is 2% and the elastic modulus is 125 GPa (18.1 Msi). C19800-H08 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). H04 is the default condition FabDigit quotes; H08 is available on request or by drawing note.
Advantages
- High strength — 595 MPa (86.3 ksi), better than 94% of copper alloy grades
- High electrical conductivity — 43 % IACS, better than 75% of copper alloy grades
Limitations
- Limited service temperature — 130°C (266 °F), worse than 100% of copper alloy grades
- Limited ductility — 2%, worse than 98% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
C19800-H08 properties
Typical room-temperature values for C19800-H08; 23 are specific to this condition. Other listed values are C19800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C19800-H08 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-H08 has a yield strength of 595 MPa (86.3 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 94% of copper alloy grades. Elongation at break is 2% and the elastic modulus is 125 GPa (18.1 Msi).
Thermal6
C19800-H08 is rated for continuous service to 130°C (266 °F). It conducts heat at 172 W/m·K (99.4 BTU/hr·ft·°F), better than 74% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C19800-H08 conducts electricity at 43 % IACS, better than 75% 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-H08 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-H08's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability fair (35/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C19800-H08
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.
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.
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 | — |
C19800-H08 — frequently asked
What is C19800-H08 used for?
C19800-H08 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-H08?
C19800-H08 has a typical yield strength of 595 MPa (86.3 ksi) and a tensile strength of 615 MPa (89.2 ksi) — stronger than 94% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C19800-H08 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% 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-H08 be welded?
With care — weldability is rated fair (35/100). 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-H08?
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-H08 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-H08?
C19800-H08 is rated for continuous use to about 130°C (266 °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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.