Copper Alloy C19200-O50
Temper
UNS C19200 · ASTM B111
O50 = light annealed
Use when good formability is needed but slightly higher strength and better handling stiffness than fully soft material is wanted.
Values for the O50 condition
Other C19200 tempers and conditions
C19200 is listed in 10 conditions; see the grade overview at C19200.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick for maximum ductility: deep drawing, bending, tube expanding and coining before any strengthening cold work. | 85 | 260 | 40 | 50 HB | 62 % IACS |
O50This page Light annealed | Use when good formability is needed but slightly higher strength and better handling stiffness than fully soft material is wanted. | 105 | 275 | 38 | 58 HB | 61 % IACS |
H55Default Light drawn | Standard condenser/heat-exchanger tube condition: enough strength and straightness for tube-sheet rolling while still expandable and bendable. | 235 | 305 | 20 | 80 HB | 60 % IACS |
Quarter hard | Balanced strip temper for parts still needing 90° bends and moderate forming with better spring-back control than annealed. | 265 | 305 | 12 | 85 HB | 60 % IACS |
Half hard | Most common strip temper for stamped terminals, lead frames and radiator fins needing strength plus limited bending. | 300 | 335 | 8 | 95 HB | 59 % IACS |
Hard drawn | Hard-drawn tube or rod for pressure service and self-supporting runs where high strength matters more than bending ability. | 345 | 380 | 8 | 110 HB | 58 % IACS |
Full hard | Choose for flat springs, contacts and shear-formed parts where high yield strength and stress-relaxation resistance dominate over bendability. | 355 | 380 | 4 | 105 HB | 58 % IACS |
Extra hard | For high-strength flat stock where only gentle forming or flat blanking is required. | 380 | 400 | 3 | 115 HB | 57 % IACS |
Spring hard | Spring temper strip for contact springs and clips needing high elastic limit with usable conductivity. | 400 | 420 | 2 | 120 HB | 57 % IACS |
Extra spring hard | Highest cold-rolled strength level offered; use only for flat springs and shims with minimal forming. | 415 | 440 | 2 | 128 HB | 56 % IACS |
What is C19200-O50?
C19200-O50 is C19200 in the O50 temper — use when good formability is needed but slightly higher strength and better handling stiffness than fully soft material is wanted. C19200-O50 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 85% of copper alloy grades. Elongation at break is 38% and the elastic modulus is 117 GPa (17 Msi). C19200-O50 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,075°C (1,967 °F). H55 is the default condition FabDigit quotes; O50 is available on request or by drawing note.
Advantages
- Forms and bends easily — 88/100, better than 87% of copper alloy grades
- Ductile — tolerates forming and impact — 38%, better than 82% of copper alloy grades
- High electrical conductivity — 61 % IACS, better than 82% of copper alloy grades
- Conducts heat well — 218 W/m·K (126 BTU/hr·ft·°F), better than 80% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
Limitations
- Low strength — 105 MPa (15.2 ksi), worse than 85% of copper alloy grades
C19200-O50 properties
Typical room-temperature values for C19200-O50; 12 are specific to this condition. Other listed values are C19200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C19200-O50 has a density of 8.91 g/cm³ (0.322 lb/in³), heavier than 80% of copper alloy grades. It melts at 1,075°C (1,967 °F).
Mechanical12
C19200-O50 has a yield strength of 105 MPa (15.2 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 85% of copper alloy grades. Elongation at break is 38% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C19200-O50 is rated for continuous service to 240°C (464 °F). It conducts heat at 218 W/m·K (126 BTU/hr·ft·°F), better than 80% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
C19200-O50 conducts electricity at 61 % IACS, better than 82% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C19200-O50 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 35%.
Manufacturability8
C19200-O50's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability good (60/100); formability excellent (88/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C19200-O50
Is C19200 easy to machine?
Gummy like pure copper (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant and chip breaking; harder tempers cut cleaner.
Can C19200 be welded?
Good with resistance and GTAW/GMAW using phosphor-bronze or Cu filler; soldering and brazing are excellent, but weld heat destroys cold-work strength locally.
Can C19200 be formed, bent or molded?
Excellent cold formability in O60/O50 and H01 (deep drawing, tube expanding, fin rolling); interstage anneal at 400–550 °C, and expect springback plus limited bend radii above H04.
What surface finishes work on C19200?
Not anodizable; tin, nickel, silver or gold plate for solderability/contacts, or apply benzotriazole/lacquer to control tarnish; takes a bright buffed finish.
C19200 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 |
|---|---|---|
| Fe | 0.8 – 1.2 | 1 |
| P | 0.01 – 0.04 | 0.03 |
| Zn | ≤ 0.2 | — |
| Pbmax (typical producer limit) | ≤ 0.05 | — |
| CuCu + Ag ≥ 98.5 %, remainder | ≥ 98.5 (balance) | — |
C19200-O50 — frequently asked
What is C19200-O50 used for?
C19200-O50 is typically used for welded tube, electrical connectors and heat exchanger components. In short: most formable Cu-Fe grade; 60 % IACS tube alloy; better relaxation than pure copper.
What is the yield strength of C19200-O50?
C19200-O50 has a typical yield strength of 105 MPa (15.2 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 85% of copper alloy grades. Strength varies by condition: see the 10 listed tempers.
Is C19200-O50 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Gummy like pure copper (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant and chip breaking; harder tempers cut cleaner.
Can C19200-O50 be welded?
Yes — weldability is rated good (60/100). Good with resistance and GTAW/GMAW using phosphor-bronze or Cu filler; soldering and brazing are excellent, but weld heat destroys cold-work strength locally.
What surface finishes work on C19200-O50?
Not anodizable; tin, nickel, silver or gold plate for solderability/contacts, or apply benzotriazole/lacquer to control tarnish; takes a bright buffed finish.
Can C19200-O50 be formed, bent or molded?
Excellent cold formability in O60/O50 and H01 (deep drawing, tube expanding, fin rolling); interstage anneal at 400–550 °C, and expect springback plus limited bend radii above H04.
What is the maximum service temperature of C19200-O50?
C19200-O50 is rated for continuous use to about 240°C (464 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C19200-H55 and C19200-H10?
H55 is the default condition — standard condenser/heat-exchanger tube condition: enough strength and straightness for tube-sheet rolling while still expandable and bendable. H10: highest cold-rolled strength level offered; use only for flat springs and shims with minimal forming. Yield strength is 235 MPa in H55 versus 415 MPa in H10.
Sources
- ASTM B111/B111M — Copper and Copper-Alloy Seamless Condenser Tubes — ASTM International (2021)
- ASTM B465 — Copper-Iron Alloy Plate, Sheet, Strip and Rolled Bar — ASTM International (2020)
- CDA Alloy Datasheet C19200 — Copper Development Association (copper.org) (2024)
- 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.