Copper Alloy C47000
UNS C47000
C47000 is a copper-zinc-tin low-fuming bronze rod of the naval brass type, used as a braze-welding filler for steel, cast iron, galvanized steel and brass, with a close colour match to yellow brass.
Reference datasheet — C47000 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 AS-WELDED condition
C47000 tempers and conditions
C47000 is supplied in 2 conditions, soft to hard. AS-WELDED is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick when maximum ductility is needed for coiling, spooled wire feed or forming before use. | 150 | 370 | 42 | 90 HB | 26 % IACS |
AS-WELDEDDefault deposited braze-weld metal (RBCuZn-A) | Default condition: properties of the solidified braze-weld/fillet deposit on steel or cast iron. | 160 | 350 | 32 | 100 HB | 26 % IACS |
Supply forms, finishes and certifications
Ways C47000 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ROD-BARE | Bare rod, as-drawn | Supply form |
ROD-COATED | Flux-coated rod | Supply form |
What is C47000?
C47000 is a copper-zinc-tin low-fuming bronze rod of the naval brass type, used as a braze-welding filler for steel, cast iron, galvanized steel and brass, with a close colour match to yellow brass. Deposits are ductile and machinable at 350 MPa tensile, 160 MPa yield, 32 % elongation and HB 100 (HRB 60), and rod is supplied bare, flux-coated or in the O60 temper. It is applied at 850-900 °C with borate flux, keeping the base metal below its melting point; electrical conductivity is only 26 % IACS, service is limited to about 200 °C, and zinc fume requires ventilation. C47000 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 885°C (1,625 °F). C47000 has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 32% and the elastic modulus is 100 GPa (14.5 Msi).
What is C47000 used for?
- cast iron repair welding
- sheet metal braze welding
- galvanized steel joints
- brass fabrication
Advantages
- Ductile — tolerates forming and impact — 32%, better than 77% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
Limitations
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
C47000 properties
Typical room-temperature values for C47000-AS-WELDED; bars are the position among copper alloy grades.
Physical3
C47000 has a density of 8.41 g/cm³ (0.304 lb/in³), lighter than 72% of copper alloy grades. It melts at 885°C (1,625 °F).
Mechanical14
C47000 has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 32% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C47000 is rated for continuous service to 200°C (392 °F). It conducts heat at 116 W/m·K (67 BTU/hr·ft·°F), better than 64% of copper alloy grades. Thermal expansion is 21.2 µm/m·K (11.8 µin/in·°F).
Electrical3
C47000 conducts electricity at 26 % IACS, better than 63% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C47000 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 55%.
Manufacturability8
C47000's machinability is good (55/100, better than 71% of copper alloy grades); weldability good (60/100); formability fair (50/100).
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. C47000 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C47000
Is C47000 easy to machine?
Braze deposits machine like naval brass (~30 % of AISI 1212): use sharp positive-rake tools, light feeds; unleaded, so chips are stringy.
Can C47000 be welded?
Braze weld with neutral-to-slightly-oxidising oxy-acetylene flame or TIG at 850–900 °C with borate flux; keep base metal below its melting point and ventilate for zinc fume.
Can C47000 be formed, bent or molded?
Rod is supplied straight or coiled; α+β structure cold-bends moderately, anneal near 500 °C if heavy forming is required.
C47000 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 |
|---|---|---|
| CuAWS A5.8/A5.27 RBCuZn-A | 57 – 61 | 59 |
| Snsuppresses zinc fuming, raises dezincification resistance | 0.25 – 1 | 0.6 |
| Pb | ≤ 0.05 | |
| Femax (impurity) | ≤ 0.25 | |
| Al | ≤ 0.01 | |
| Other (total)total of unspecified elements | ≤ 0.5 | |
| Znbalance, nominally ~40 % | balance |
What surface finishes work on C47000?
Wire-brush/pickle off flux residue immediately; deposit takes polishing, tin or nickel plating, and clear lacquer — no anodizing.
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).
How much does C47000 cost?
C47000 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.
C47000 — frequently asked
What is C47000 used for?
C47000 is typically used for cast iron repair welding, sheet metal braze welding, galvanized steel joints and brass fabrication. In short: low-fuming braze-welding rod; colour-matched brass filler; joins dissimilar steel and brass.
What is the yield strength of C47000?
C47000 has a typical yield strength of 160 MPa (23.2 ksi) and a tensile strength of 350 MPa (50.8 ksi) — weaker than 65% of copper alloy grades. Strength varies by condition: see the 2 listed tempers.
Is C47000 easy to machine?
Reasonably — machinability is rated good (55/100, better than 71% of copper alloy grades). Braze deposits machine like naval brass (~30 % of AISI 1212): use sharp positive-rake tools, light feeds; unleaded, so chips are stringy.
Can C47000 be welded?
Yes — weldability is rated good (60/100). Braze weld with neutral-to-slightly-oxidising oxy-acetylene flame or TIG at 850–900 °C with borate flux; keep base metal below its melting point and ventilate for zinc fume.
What surface finishes work on C47000?
Wire-brush/pickle off flux residue immediately; deposit takes polishing, tin or nickel plating, and clear lacquer — no anodizing.
Can C47000 be formed, bent or molded?
Rod is supplied straight or coiled; α+β structure cold-bends moderately, anneal near 500 °C if heavy forming is required.
What is the maximum service temperature of C47000?
C47000 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 C47000 AS-WELDED and C47000-O60?
AS-WELDED is the default condition — default condition: properties of the solidified braze-weld/fillet deposit on steel or cast iron. O60: pick when maximum ductility is needed for coiling, spooled wire feed or forming before use. Yield strength is 160 MPa in AS-WELDED versus 150 MPa in O60.
How much does C47000 cost?
C47000 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 A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- AWS A5.27/A5.27M — Copper and Copper-Alloy Rods for Oxyfuel Gas Welding — American Welding Society (2017)
- UNS C47000 alloy data (naval-brass welding rod) — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.