Copper Alloy C65600
UNS C65600
C65600 is a copper-silicon (silicon bronze) filler wire used for MIG brazing galvanized and coated steel sheet and for welding silicon bronze, valued for low fuming and good wetting.
Reference datasheet — C65600 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 AW condition
C65600 tempers and conditions
C65600 is supplied in one standard condition, AW. AW is the default FabDigit quotes; the values on this page are for it.
Supply forms, finishes and certifications
Ways C65600 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
H-WIRE | Hard-drawn spooled GMAW wire | Supply form |
O-ROD | Annealed straight-length TIG rod | Supply form |
MIG-BRAZE | Brazed joint on galvanized/coated steel sheet | Supply option |
What is C65600?
C65600 is a copper-silicon (silicon bronze) filler wire used for MIG brazing galvanized and coated steel sheet and for welding silicon bronze, valued for low fuming and good wetting. Deposits give about 190 MPa yield, 350 MPa tensile, 35% elongation and 85 HB (50 HRB), with 7% IACS and 36 W/(m·K) — low conductivity for a copper alloy, so specify C18980 filler for electrical work. It is supplied as hard-drawn spool wire and annealed rod. Service is limited to 200 °C and the deposit is hot-crack sensitive if heat input and interpass temperature are allowed to rise. C65600 has a density of 8.53 g/cm³ (0.308 lb/in³), lighter than 62% of copper alloy grades. It melts at 970°C (1,778 °F). C65600 has a yield strength of 190 MPa (27.6 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 57% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 103 GPa (14.9 Msi).
What is C65600 used for?
- MIG brazing of galvanized auto body sheet
- silicon bronze fabrication
- dissimilar steel-to-copper joints
- sheet metal HVAC ductwork
Advantages
- Readily welded — 92/100, better than 99% of copper alloy grades
- Forms and bends easily — 85/100, better than 85% of copper alloy grades
- Good corrosion resistance — 72/100, better than 84% of copper alloy grades
- Ductile — tolerates forming and impact — 35%, better than 80% of copper alloy grades
Limitations
- Poor heat conductor — 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades
- Low electrical conductivity — 7 % IACS, worse than 86% of copper alloy grades
C65600 properties
Typical room-temperature values for C65600-AW; bars are the position among copper alloy grades.
Physical3
C65600 has a density of 8.53 g/cm³ (0.308 lb/in³), lighter than 62% of copper alloy grades. It melts at 970°C (1,778 °F).
Mechanical12
C65600 has a yield strength of 190 MPa (27.6 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 57% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C65600 is rated for continuous service to 200°C (392 °F). It conducts heat at 36 W/m·K (20.8 BTU/hr·ft·°F), worse than 86% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C65600 conducts electricity at 7 % IACS, worse than 86% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 84% of copper alloy grades.
Sustainability4
Producing a kilogram of C65600 takes about 62 MJ of energy and emits 4 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C65600's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability excellent (92/100); formability excellent (85/100).
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. C65600 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C65600
Is C65600 easy to machine?
Weld beads machine like silicon bronze — gummy, ~30 % of free-cutting brass; use sharp positive-rake tools, generous rake angles and flood coolant.
Can C65600 be welded?
Run GMAW/GTAW with pure argon, short-arc or pulsed transfer and low heat input; keep interpass below ~150 °C and stringer beads to avoid hot cracking, and clean oxides before each pass.
Can C65600 be formed, bent or molded?
Wire is cold-drawn to size; annealed rod bends readily, hard-drawn spool wire must not be sharply kinked or feeding suffers.
C65600 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 |
|---|---|---|
| Siprimary deoxidizer/strengthener | 2.8 – 4 | 3.1 |
| Mn | ≤ 1.5 | 1 |
| Sn | ≤ 1.5 | 0.1 |
| Zn | ≤ 1.5 | 0.2 |
| Fe | ≤ 0.5 | 0.1 |
| Alkept very low to avoid oxide inclusions | ≤ 0.01 | 0.01 |
| Pb | ≤ 0.02 | 0.01 |
| Other (total)sum of unspecified elements | ≤ 0.5 | |
| Curemainder, typically 95–97 % | balance |
What surface finishes work on C65600?
Deposits wire-brush (stainless brush only) and polish to a bronze lustre; can be patinated or clear-lacquered but not anodized, and zinc-rich coatings should be re-applied at MIG-brazed joints.
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 C65600 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- ERCuSi-A
How much does C65600 cost?
C65600 is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C65600 — frequently asked
What is C65600 used for?
C65600 is typically used for MIG brazing of galvanized auto body sheet, silicon bronze fabrication, dissimilar steel-to-copper joints and sheet metal HVAC ductwork. In short: standard MIG-brazing wire; low fuming, good wetting; low-heat-input sheet joining.
What is the yield strength of C65600?
C65600 has a typical yield strength of 190 MPa (27.6 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 57% of copper alloy grades.
Is C65600 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Weld beads machine like silicon bronze — gummy, ~30 % of free-cutting brass; use sharp positive-rake tools, generous rake angles and flood coolant.
Can C65600 be welded?
Yes — weldability is rated excellent (92/100). Run GMAW/GTAW with pure argon, short-arc or pulsed transfer and low heat input; keep interpass below ~150 °C and stringer beads to avoid hot cracking, and clean oxides before each pass.
What surface finishes work on C65600?
Deposits wire-brush (stainless brush only) and polish to a bronze lustre; can be patinated or clear-lacquered but not anodized, and zinc-rich coatings should be re-applied at MIG-brazed joints.
Can C65600 be formed, bent or molded?
Wire is cold-drawn to size; annealed rod bends readily, hard-drawn spool wire must not be sharply kinked or feeding suffers.
What is the maximum service temperature of C65600?
C65600 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C65600 cost?
C65600 is a high-cost copper alloy ($$$$), 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
- AWS A5.7/A5.7M — Specification for Copper and Copper-Alloy Bare Welding Rods and Electrodes — American Welding Society (2021)
- UNS C65600 alloy record / Copper Alloy Data Sheets — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ERCuSi-A / CuSi3 MIG brazing wire datasheets — ESAB / Lincoln Electric / Böhler Welding (2022)
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.