Copper Alloy C11300
UNS C11300 · ASTM B48 · EN CW011A, CR013A
C11300 is an electrolytic tough-pitch copper with a minimum silver addition (CW011A, CuAg0.10) that raises softening resistance while holding ETP-level conductivity of 98 % IACS and 388 W/m·K.
Reference datasheet — C11300 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the H04 condition
C11300 tempers and conditions
C11300 is supplied in 13 conditions, soft to hard. H04 is the default FabDigit quotes; the values on this page are for it.
Compare all 13 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot rolled and annealed | Soft heavy plate/bar for deep forming, bending of busbars and welded fabrications. | 62 | 220 | 48 | 42 HB | 101 % IACS |
Soft annealed | Standard fully annealed condition for maximum ductility, drawing, spinning and gasket/roofing use. | 76 | 235 | 45 | 45 HB | 101 % IACS |
As hot rolled | Mill product taken straight off the hot mill — cheapest heavy plate/bar for busbar and grounding parts where temper is not critical. | 90 | 235 | 42 | 50 HB | 100 % IACS |
1/8 hard | Lightly stiffened strip that still bends freely — good for formed terminals needing slight springback control. | 170 | 250 | 32 | 60 HB | 100 % IACS |
Light drawn | Lightly drawn tube/rod that still bends and flares, common for conductive tubing and machined blanks. | 205 | 260 | 25 | 68 HB | 99 % IACS |
Quarter hard | Best compromise of formability and strength for stamped, bent contacts and clips. | 215 | 275 | 25 | 70 HB | 99 % IACS |
Half hard | General-purpose semi-rigid strip/bar: busbar links, commutator risers, moderate 90° bends across grain. | 255 | 300 | 14 | 85 HB | 99 % IACS |
Three-quarter hard | Higher stiffness with limited bending — used for flat springs and stiff conductor strip. | 285 | 320 | 10 | 93 HB | 98 % IACS |
H04Default Full hard | The workhorse stocked temper: full-hard strip/bar/rod that keeps its hardness through soldering thanks to the silver addition. | 310 | 345 | 6 | 100 HB | 98 % IACS |
Extra hard | Extra-hard strip for stiff, flat-formed parts and blanking where minimal bending is required. | 330 | 365 | 5 | 105 HB | 97.5 % IACS |
Spring hard | Spring temper strip for conductive leaf springs and contacts that must not soften during reflow soldering. | 345 | 380 | 4 | 110 HB | 97 % IACS |
Hard drawn | Hard-drawn wire/rod for magnet-wire, commutator bars and windings that must resist softening during soldering or short-term overload. | 350 | 400 | 3 | 105 HB | 97.5 % IACS |
Extra spring hard | Maximum cold-worked strength available in the grade; for thin flat springs and shims with essentially no forming. | 360 | 395 | 3.5 | 115 HB | 97 % IACS |
What is C11300?
C11300 is an electrolytic tough-pitch copper with a minimum silver addition (CW011A, CuAg0.10) that raises softening resistance while holding ETP-level conductivity of 98 % IACS and 388 W/m·K. It is used as strip, bar and wire for commutator bars, lead-in wires and motor conductors that must keep their temper through soldering or brazing; the listed temper gives 345 MPa tensile, 310 MPa yield and 6 % elongation. Residual oxygen of 0.02–0.05 % limits fusion welding and prohibits hydrogen-bearing atmospheres, and service is rated to 200 °C. C11600 carries more silver for higher softening resistance; C12200 suits welded work. C11300 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). C11300 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi).
What is C11300 used for?
- commutator bars
- lead-in wires
- motor conductors
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
Limitations
- Limited ductility — 6%, worse than 89% of copper alloy grades
C11300 properties
Typical room-temperature values for C11300-H04; bars are the position among copper alloy grades.
Physical3
C11300 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
C11300 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C11300 is rated for continuous service to 200°C (392 °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
C11300 conducts electricity at 98 % IACS, better than 94% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C11300 takes about 57 MJ of energy and emits 3.6 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 35%.
Manufacturability8
C11300's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability fair (35/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C11300 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C11300
Is C11300 easy to machine?
Gummy and stringy like ETP copper (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant, and avoid dwelling; consider C14500/C36000 if heavy machining dominates.
Can C11300 be welded?
Resistance and brazing/soldering are excellent; fusion welding is compromised by the 0.02–0.05 % oxygen (porosity, hydrogen embrittlement) so prefer deoxidised C12200 filler, EB/laser or friction welding for critical joints.
Can C11300 be formed, bent or molded?
Annealed and 1/8–1/4 hard tempers deep draw, coin and bend to very tight radii; hard tempers need generous bend radii (≥1–2 t across grain) and interstage annealing at 400–600 °C.
C11300 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 |
|---|---|---|
| Ag8 troy oz/short ton minimum; C11400 = 10 oz, C11600 = 25 oz variants | ≥ 0.03 | 0.03 |
| Otypical tough-pitch oxygen level, not a specified limit | 0.02 – 0.05 | 0.03 |
| CuCu + Ag counted together, ASTM B152/B133; oxygen present as Cu2O | ≥ 99.9 (balance) |
What surface finishes work on C11300?
Not anodisable — tin, nickel or silver electroplate for solderability and tarnish control, or use chemical blackening/clear lacquer; polishes to a high lustre but oxidises quickly if unprotected.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C11300 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does C11300 cost?
C11300 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C11300 — frequently asked
What is C11300 used for?
C11300 is typically used for commutator bars, lead-in wires and motor conductors. In short: silver-bearing ETP copper; holds temper through soldering; full ETP conductivity.
What is the yield strength of C11300?
C11300 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 345 MPa (50 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 13 listed tempers.
Is C11300 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Gummy and stringy like ETP copper (≈20 % of free-cutting brass) — use sharp positive-rake tools, high speed, generous coolant, and avoid dwelling; consider C14500/C36000 if heavy machining dominates.
Can C11300 be welded?
With care — weldability is rated fair (35/100). Resistance and brazing/soldering are excellent; fusion welding is compromised by the 0.02–0.05 % oxygen (porosity, hydrogen embrittlement) so prefer deoxidised C12200 filler, EB/laser or friction welding for critical joints.
What surface finishes work on C11300?
Not anodisable — tin, nickel or silver electroplate for solderability and tarnish control, or use chemical blackening/clear lacquer; polishes to a high lustre but oxidises quickly if unprotected.
Can C11300 be formed, bent or molded?
Annealed and 1/8–1/4 hard tempers deep draw, coin and bend to very tight radii; hard tempers need generous bend radii (≥1–2 t across grain) and interstage annealing at 400–600 °C.
What is the maximum service temperature of C11300?
C11300 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C11300-H04 and C11300-O25?
H04 is the default condition — the workhorse stocked temper: full-hard strip/bar/rod that keeps its hardness through soldering thanks to the silver addition. O25: soft heavy plate/bar for deep forming, bending of busbars and welded fabrications. Yield strength is 310 MPa in H04 versus 62 MPa in O25.
How much does C11300 cost?
C11300 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM B152/B152M — Copper Sheet, Strip, Plate, and Rolled Bar — ASTM International (2019)
- ASTM B133 — Copper Rod, Bar, and Shapes — ASTM International (2020)
- CDA Alloy Database — C11300 Silver-Bearing Tough Pitch Copper — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- EN 13601 / CW011A copper designations — CEN (2013)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.