Copper Alloy C14520-H00
Supply condition
UNS C14520
H00 = eighth hard
Light draw pass for straightness and size tolerance while keeping good ductility for staking or bending.
Values for the H00 condition
Other C14520 tempers and conditions
C14520 is listed in 7 conditions; see the grade overview at C14520.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Choose when maximum conductivity, bending or riveting/upsetting is required after machining. | 70 | 225 | 50 | 45 HB | 93 % IACS |
As hot rolled | Mill hot-worked bar for large diameters that will be fully machined; lowest strength but best conductivity. | 95 | 235 | 40 | 50 HB | 93 % IACS |
H00This page Eighth hard | Light draw pass for straightness and size tolerance while keeping good ductility for staking or bending. | 180 | 255 | 30 | 65 HB | 92 % IACS |
Quarter hard | Intermediate temper when both moderate strength and some cold-forming (bending, flaring) are needed. | 215 | 275 | 25 | 80 HB | 92 % IACS |
Half hard | Best all-round temper for screw-machine parts that still need some bending or crimping ductility. | 240 | 290 | 20 | 88 HB | 91 % IACS |
H04Default Full hard | Standard stocked bar temper for high-volume CNC/screw-machine electrical parts — maximum strength and best chip control. | 305 | 335 | 10 | 100 HB | 90 % IACS |
Extra hard | Small-diameter wire/bar where maximum hardness and stiffness of the finished pin or contact matters. | 340 | 365 | 7 | 110 HB | 89 % IACS |
What is C14520-H00?
C14520-H00 is C14520 supplied in the H00 condition — light draw pass for straightness and size tolerance while keeping good ductility for staking or bending. C14520-H00 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 255 MPa (37 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 117 GPa (17 Msi). C14520-H00 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,051°C (1,924 °F). H04 is the default condition FabDigit quotes; H00 is available on request or by drawing note.
Advantages
- Conducts heat well — 360 W/m·K (208 BTU/hr·ft·°F), better than 90% of copper alloy grades
- High electrical conductivity — 92 % IACS, better than 89% of copper alloy grades
- Easy to machine — 80/100, better than 86% of copper alloy grades
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Limited service temperature — 175°C (347 °F), worse than 92% of copper alloy grades
C14520-H00 properties
Typical room-temperature values for C14520-H00; 20 are specific to this condition. Other listed values are C14520 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C14520-H00 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,051°C (1,924 °F).
Mechanical13
C14520-H00 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 255 MPa (37 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C14520-H00 is rated for continuous service to 175°C (347 °F). It conducts heat at 360 W/m·K (208 BTU/hr·ft·°F), better than 90% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C14520-H00 conducts electricity at 92 % IACS, better than 89% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C14520-H00 takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C14520-H00's machinability is very good (80/100, better than 86% of copper alloy grades); weldability good (55/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C14520-H00
Is C14520 easy to machine?
Excellent free-cutting copper — run high speeds with sharp positive-rake carbide, light feeds and flood coolant; chips break cleanly, ~80–90 % of free-cutting brass throughput.
Can C14520 be welded?
Resistance and brazing/soldering are excellent thanks to P-deoxidation; GTAW/GMAW is only fair — tellurium can cause hot cracking, so keep heat input low and avoid heavily restrained joints.
Can C14520 be formed, bent or molded?
Anneal (450–600 °C) before severe bending or upsetting; hard tempers tolerate only mild bends because Cu₂Te particles limit ductility.
What surface finishes work on C14520?
Not anodisable; bright dip, mechanically polish, or electroplate with Ni/Ag/Sn (use a nickel barrier for high-temperature contacts); protect bare surfaces with lacquer or benzotriazole against tarnish.
C14520 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 |
|---|---|---|
| Teforms Cu₂Te chip-breaking particles | 0.4 – 0.7 | 0.5 |
| Pdeoxidiser — prevents hydrogen embrittlement in brazing/annealing | 0 – 0.02 | 0.01 |
| CuCu + Ag + Te + P ≥ 99.90 % per CDA/ASTM B301 | ≥ 99.9 (balance) | — |
C14520-H00 — frequently asked
What is C14520-H00 used for?
C14520-H00 is typically used for machined electrical fittings, terminals and brazed connector components. In short: brazable free-machining copper; 90% IACS with chip control; better joining than C14510.
What is the yield strength of C14520-H00?
C14520-H00 has a typical yield strength of 180 MPa (26.1 ksi) and a tensile strength of 255 MPa (37 ksi) — weaker than 59% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C14520-H00 easy to machine?
Yes — machinability is rated very good (80/100, better than 86% of copper alloy grades). Excellent free-cutting copper — run high speeds with sharp positive-rake carbide, light feeds and flood coolant; chips break cleanly, ~80–90 % of free-cutting brass throughput.
Can C14520-H00 be welded?
Yes — weldability is rated good (55/100). Resistance and brazing/soldering are excellent thanks to P-deoxidation; GTAW/GMAW is only fair — tellurium can cause hot cracking, so keep heat input low and avoid heavily restrained joints.
What surface finishes work on C14520-H00?
Not anodisable; bright dip, mechanically polish, or electroplate with Ni/Ag/Sn (use a nickel barrier for high-temperature contacts); protect bare surfaces with lacquer or benzotriazole against tarnish.
Can C14520-H00 be formed, bent or molded?
Anneal (450–600 °C) before severe bending or upsetting; hard tempers tolerate only mild bends because Cu₂Te particles limit ductility.
What is the maximum service temperature of C14520-H00?
C14520-H00 is rated for continuous use to about 175°C (347 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C14520-H04 and C14520-O61?
H04 is the default condition — standard stocked bar temper for high-volume CNC/screw-machine electrical parts — maximum strength and best chip control. O61: choose when maximum conductivity, bending or riveting/upsetting is required after machining. Yield strength is 305 MPa in H04 versus 70 MPa in O61.
Sources
- ASTM B301/B301M Free-Cutting Copper Rod, Bar, Wire and Shapes — ASTM International (2020)
- CDA Alloy Datasheets C14500 / C14520 (Tellurium Copper) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Tellurium copper bar technical data — Wieland / Aurubis (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.