Copper Alloy TU2-H80
Temper
GB TU2 · UNS C10200, C12200 · JIS C1020
H80 = hard drawn
Rigid drawn tube for pressure lines, waveguide and vacuum plumbing where straightness and pressure rating matter.
Values for the H80 condition
Other TU2 tempers and conditions
TU2 is listed in 8 conditions; see the grade overview at TU2.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
MDefault Thermomechanically controlled processed | Default stock condition: maximum conductivity and ductility for deep drawing, gaskets, vacuum parts, ACR tube and busbar bending. | 70 | 230 | 45 | 42 HB | 101 % IACS |
Light drawn tube | Semi-flexible drawn tube for refrigeration/medical-gas lines that must still be bent but hold shape. | 190 | 250 | 25 | 70 HB | 100 % IACS |
quarter hard, cold worked ~11 % | Light cold work for stiffer sheet/strip that still bends and forms; used for stamped terminals and shielding. | 195 | 260 | 30 | 70 HB | 100 % IACS |
half hard | Common compromise temper for bar, strip and busbar needing handling stiffness with moderate bendability. | 225 | 285 | 16 | 85 HB | 99 % IACS |
H80This page Hard drawn | Rigid drawn tube for pressure lines, waveguide and vacuum plumbing where straightness and pressure rating matter. | 275 | 315 | 10 | 95 HB | 98 % IACS |
hard drawn / hard rolled | Choose for straight rod, machined electrodes, commutator bars and busbar where strength and dimensional stability outrank formability. | 290 | 330 | 8 | 100 HB | 98 % IACS |
extra hard | Heavily cold-worked strip/rod for maximum strength copper contacts and springy clips where forming is minimal. | 320 | 355 | 5 | 105 HB | 97 % IACS |
Spring hard | Maximum cold-worked strength for conductive springs, gaskets and RF finger stock; almost no forming reserve. | 350 | 390 | 4 | 115 HB | 97 % IACS |
What is TU2-H80?
TU2-H80 is TU2 in the H80 temper — rigid drawn tube for pressure lines, waveguide and vacuum plumbing where straightness and pressure rating matter. TU2-H80 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 315 MPa (45.7 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 119 GPa (17.3 Msi). TU2-H80 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F). M is the default condition FabDigit quotes; H80 is available on request or by drawing note.
Advantages
- Conducts heat well — 388 W/m·K (224.2 BTU/hr·ft·°F), better than 95% of copper alloy grades
- High electrical conductivity — 98 % IACS, better than 94% of copper alloy grades
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
TU2-H80 properties
Typical room-temperature values for TU2-H80; 22 are specific to this condition. Other listed values are TU2 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
TU2-H80 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F).
Mechanical12
TU2-H80 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 315 MPa (45.7 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 119 GPa (17.3 Msi).
Thermal6
TU2-H80 is rated for continuous service to 150°C (302 °F). It conducts heat at 388 W/m·K (224.2 BTU/hr·ft·°F), better than 95% of copper alloy grades. Thermal expansion is 17 µm/m·K (9.44 µin/in·°F).
Electrical3
TU2-H80 conducts electricity at 98 % IACS, better than 94% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of TU2-H80 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 10%.
Manufacturability7
TU2-H80's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability good (65/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with TU2-H80
Is TU2 easy to machine?
Gummy and stringy — use sharp positive-rake tools, high speed with low feed, generous coolant, and prefer half-hard/hard temper to reduce burring.
Can TU2 be welded?
GTAW/EBW/laser and friction welding all work well; oxygen-free chemistry avoids hydrogen embrittlement, but preheat 200–500 °C and high heat input are needed because of 390 W/m·K conductivity.
Can TU2 be formed, bent or molded?
In M temper it deep-draws, spins and cold-heads readily with no intermediate cracking; interstage anneal at 375–650 °C after ~60 % reduction.
What surface finishes work on TU2?
Not anodisable — electroplate Ni/Ag/Sn or Au for contacts, or use chemical blackening/clear lacquer; takes a bright mirror polish but tarnishes without a coating.
TU2 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 |
|---|---|---|
| Ooxygen ceiling that defines the OF grade | ≤ 0 | 0 |
| P | ≤ 0 | — |
| Bi | ≤ 0 | — |
| Sb | ≤ 0 | — |
| As | ≤ 0 | — |
| Fe | ≤ 0 | — |
| Ni | ≤ 0 | — |
| Pb | ≤ 0 | — |
| Sn | ≤ 0 | — |
| S | ≤ 0 | — |
| Zn | ≤ 0 | — |
| CuCu + Ag, oxygen-free; total impurities ≤ 0.05 % | ≥ 99.95 (balance) | — |
TU2-H80 — frequently asked
What is TU2-H80 used for?
TU2-H80 is typically used for refrigeration tubing, bus conductors, vacuum parts and welding cable. In short: standard oxygen-free copper; weldable without embrittlement; refrigeration tube grade.
What is the yield strength of TU2-H80?
TU2-H80 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 315 MPa (45.7 ksi) — stronger than 57% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is TU2-H80 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Gummy and stringy — use sharp positive-rake tools, high speed with low feed, generous coolant, and prefer half-hard/hard temper to reduce burring.
Can TU2-H80 be welded?
Yes — weldability is rated good (65/100). GTAW/EBW/laser and friction welding all work well; oxygen-free chemistry avoids hydrogen embrittlement, but preheat 200–500 °C and high heat input are needed because of 390 W/m·K conductivity.
What surface finishes work on TU2-H80?
Not anodisable — electroplate Ni/Ag/Sn or Au for contacts, or use chemical blackening/clear lacquer; takes a bright mirror polish but tarnishes without a coating.
Can TU2-H80 be formed, bent or molded?
In M temper it deep-draws, spins and cold-heads readily with no intermediate cracking; interstage anneal at 375–650 °C after ~60 % reduction.
What is the maximum service temperature of TU2-H80?
TU2-H80 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 TU2-M and TU2-H08?
M is the default condition — default stock condition: maximum conductivity and ductility for deep drawing, gaskets, vacuum parts, ACR tube and busbar bending. H08: maximum cold-worked strength for conductive springs, gaskets and RF finger stock; almost no forming reserve. Yield strength is 70 MPa in M versus 350 MPa in H08.
Sources
- ASTM B170 Oxygen-Free Electrolytic Copper — Refinery Shapes — ASTM (2019)
- ASTM B152/B152M Copper Sheet, Strip, Plate and Rolled Bar — ASTM (2019)
- ASTM B75/B68 Seamless Copper Tube — ASTM (2020)
- C10200 Oxygen-Free Copper alloy datasheet — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys — ASM International (1990)
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.