Copper Alloy C12000-H02
Supply condition
UNS C12000 · EN CW023A, Cu-DLP · JIS C1201 · GB TP1, TP2
H02 = half hard
Workhorse strength temper for bus bars, terminals and stamped parts needing moderate forming plus rigidity.
Values for the H02 condition
Other C12000 tempers and conditions
C12000 is listed in 13 conditions; see the grade overview at C12000.
Compare all 13 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
O60Default Soft annealed | Most stocked condition for tube and sheet: maximum formability, bendability and conductivity for coils, pipe bending and deep drawing. | 70 | 225 | 45 | 45 HB | 95 % IACS |
Hot rolled and annealed | Heavy plate/bus bar condition supplied soft after hot rolling; pick when thickness prevents cold-rolled tempers. | 76 | 220 | 45 | 45 HB | 95 % IACS |
As hot rolled | Mill hot-rolled plate/bar with no further processing; cheapest heavy-section form for bus bars and machined blanks. | 90 | 235 | 40 | 50 HB | 95 % IACS |
1/8 hard | Slightly stiffened sheet/strip that still deep-draws and bends tightly; used for roofing, gaskets and formed electrical parts. | 170 | 250 | 30 | 60 HB | 94 % IACS |
Light drawn | Light-drawn tube temper: enough strength for straight lengths yet still bendable and flareable for plumbing/HVAC lines. | 200 | 260 | 25 | 70 HB | 94 % IACS |
Quarter hard | General-purpose light temper: better flatness and handling stiffness than annealed while retaining good bendability. | 205 | 265 | 25 | 70 HB | 94 % IACS |
H02This page Half hard | Workhorse strength temper for bus bars, terminals and stamped parts needing moderate forming plus rigidity. | 250 | 290 | 14 | 85 HB | 94 % IACS |
Three-quarter hard | Higher-strength strip for flat springs, contacts and clamps where only mild forming is required. | 275 | 310 | 10 | 90 HB | 93 % IACS |
Hard drawn | Standard hard-drawn condition for rigid straight tube, rod and wire; brazes readily but must be re-annealed before tight bending. | 290 | 330 | 10 | 95 HB | 93 % IACS |
Full hard | Standard hard temper for rigid bus bar, rod and strip; best strength/conductivity balance without further work. | 305 | 330 | 6 | 95 HB | 93 % IACS |
Extra hard | Heavily cold-worked strip/wire for stiff, low-deflection parts; forming must be limited to gentle radii. | 330 | 350 | 4 | 100 HB | 93 % IACS |
Spring hard | Spring-tempered strip/wire for conductive springs, contacts and clips where elastic limit matters most. | 345 | 365 | 4 | 105 HB | 93 % IACS |
Extra spring hard | Maximum cold-worked strength available in this grade; for thin conductive springs and contact blades, essentially non-formable. | 360 | 380 | 3 | 110 HB | 92 % IACS |
What is C12000-H02?
C12000-H02 is C12000 supplied in the H02 condition — workhorse strength temper for bus bars, terminals and stamped parts needing moderate forming plus rigidity. C12000-H02 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 54% of copper alloy grades. Elongation at break is 14% and the elastic modulus is 115 GPa (16.7 Msi). C12000-H02 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F). O60 is the default condition FabDigit quotes; H02 is available on request or by drawing note.
Advantages
- High electrical conductivity — 94 % IACS, better than 90% of copper alloy grades
- Readily welded — 75/100, better than 89% of copper alloy grades
- Conducts heat well — 345 W/m·K (199.3 BTU/hr·ft·°F), better than 87% of copper alloy grades
Limitations
- 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
C12000-H02 properties
Typical room-temperature values for C12000-H02; 11 are specific to this condition. Other listed values are C12000 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C12000-H02 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F).
Mechanical13
C12000-H02 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 54% of copper alloy grades. Elongation at break is 14% and the elastic modulus is 115 GPa (16.7 Msi).
Thermal6
C12000-H02 is rated for continuous service to 150°C (302 °F). It conducts heat at 345 W/m·K (199.3 BTU/hr·ft·°F), better than 87% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C12000-H02 conducts electricity at 94 % IACS, better than 90% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C12000-H02 takes about 57 MJ of energy and emits 3.8 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C12000-H02's machinability is poor (22/100, worse than 94% of copper alloy grades); weldability very good (75/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C12000-H02
Is C12000 easy to machine?
Gummy and stringy — rating only ~20 % of AISI 1212; use sharp positive-rake tools, high speed, generous coolant, or switch to a free-machining copper for turned parts.
Can C12000 be welded?
Low residual phosphorus makes it far less hydrogen-embrittlement prone than ETP copper: GTAW/GMAW with ERCu, preheat 200–500 °C on heavy sections; brazing and soldering are excellent.
Can C12000 be formed, bent or molded?
Outstanding cold formability in O60/H00 (deep draw, spin, bend to tight radii); interanneal 400–600 °C after ~50 % reduction; hard tempers need generous bend radii.
What surface finishes work on C12000?
Not anodisable — polish and lacquer, or tin/nickel/silver plate for contacts; benzotriazole or chromate passivation slows tarnish and patina formation.
C12000 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 |
|---|---|---|
| Presidual deoxidiser; low level preserves conductivity | 0 – 0.01 | 0.01 |
| CuCu + Ag, min 99.90 % per ASTM B152 / GB/T 5231 TP1 | ≥ 99.9 (balance) | — |
C12000-H02 — frequently asked
What is C12000-H02 used for?
C12000-H02 is typically used for welded/brazed tubing, heat exchangers and roofing. In short: best-forming weldable copper; weldable alternative to ETP; 95 % IACS tube grade.
What is the yield strength of C12000-H02?
C12000-H02 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 54% of copper alloy grades. Strength varies by condition: see the 13 listed tempers.
Is C12000-H02 easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Gummy and stringy — rating only ~20 % of AISI 1212; use sharp positive-rake tools, high speed, generous coolant, or switch to a free-machining copper for turned parts.
Can C12000-H02 be welded?
Yes — weldability is rated very good (75/100). Low residual phosphorus makes it far less hydrogen-embrittlement prone than ETP copper: GTAW/GMAW with ERCu, preheat 200–500 °C on heavy sections; brazing and soldering are excellent.
What surface finishes work on C12000-H02?
Not anodisable — polish and lacquer, or tin/nickel/silver plate for contacts; benzotriazole or chromate passivation slows tarnish and patina formation.
Can C12000-H02 be formed, bent or molded?
Outstanding cold formability in O60/H00 (deep draw, spin, bend to tight radii); interanneal 400–600 °C after ~50 % reduction; hard tempers need generous bend radii.
What is the maximum service temperature of C12000-H02?
C12000-H02 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 C12000-O60 and C12000-H10?
O60 is the default condition — most stocked condition for tube and sheet: maximum formability, bendability and conductivity for coils, pipe bending and deep drawing. H10: maximum cold-worked strength available in this grade; for thin conductive springs and contact blades, essentially non-formable. Yield strength is 70 MPa in O60 versus 360 MPa in H10.
Sources
- ASTM B152/B152M Copper Sheet, Strip, Plate and Rolled Bar — ASTM International (2019)
- ASTM B75/B75M Seamless Copper Tube — ASTM International (2019)
- ASTM B601 Temper Designations for Copper and Copper Alloys — ASTM International (2019)
- CDA Alloy C12000 (Cu-DLP) datasheet — Copper Development Association / copper.org (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- EN 1652 / EN 12449 Cu-DLP (CW023A) — CEN (2012)
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.