Copper Alloy C90200
UNS C90200
C90200 is a low-tin cast bronze in the C90000 tin-bronze family, supplied only in cast form.
Reference datasheet — C90200 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 M01 condition
C90200 tempers and conditions
C90200 is supplied in 4 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard general-purpose sand-cast condition for valve bodies, fittings and pressure-tight castings. | 124 | 276 | 30 | 60 HB | 14 % IACS |
As plaster cast | For small, thin-walled or intricate near-net-shape parts where machining allowance must be minimal. | 130 | 280 | 25 | 62 HB | 14 % IACS |
As centrifugally cast | Choose for rings, sleeves and bushings needing denser, sounder metal than sand casting. | 138 | 300 | 25 | 65 HB | 14 % IACS |
As continuous cast | Best choice for stock bar/tube to be machined: fine grain, low porosity, highest as-cast strength. | 145 | 310 | 22 | 70 HB | 14 % IACS |
What is C90200?
C90200 is a low-tin cast bronze in the C90000 tin-bronze family, supplied only in cast form. It is chosen for pressure-tight, corrosion-resistant general-purpose castings and fittings, providing 276 MPa tensile strength, 124 MPa yield, 30 % elongation, 60 HB and 14 % IACS conductivity. Machinability is about 30 % of free-cutting brass because the alloy carries no lead, and the long freezing range requires directional solidification for sound heavy sections. Where higher hardness and load capacity are needed, C90400 is the closer choice. C90200 has a density of 8.72 g/cm³ (0.315 lb/in³), lighter than 54% of copper alloy grades. It melts at 855°C (1,571 °F). C90200 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 100 GPa (14.5 Msi).
What is C90200 used for?
- Valve bodies
- Pump parts
- Bearings
- Fittings
Advantages
- Good corrosion resistance — 72/100, better than 84% of copper alloy grades
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
- Low strength — 124 MPa (18 ksi), worse than 78% of copper alloy grades
C90200 properties
Typical room-temperature values for C90200-M01; bars are the position among copper alloy grades.
Physical3
C90200 has a density of 8.72 g/cm³ (0.315 lb/in³), lighter than 54% of copper alloy grades. It melts at 855°C (1,571 °F).
Mechanical15
C90200 has a yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C90200 is rated for continuous service to 230°C (446 °F). It conducts heat at 71 W/m·K (41 BTU/hr·ft·°F), worse than 54% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C90200 conducts electricity at 14 % IACS, worse than 56% 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 C90200 takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 70%.
Manufacturability8
C90200's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability fair (45/100); formability not recommended (10/100).
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. C90200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C90200
Is C90200 easy to machine?
Machinability ≈30% of free-cutting brass — gummy without lead; use sharp positive-rake carbide, high speed, light feed and good lubrication; continuous-cast stock machines best.
Can C90200 be welded?
Braze and solder readily; arc/gas welding is fair — use ERCuSn-A filler, preheat 150–200 °C and avoid heavy restraint to prevent hot cracking.
Can C90200 be formed, bent or molded?
Casting alloy only (no wrought forms); long freezing range means directional solidification with generous risers and chills is needed for pressure-tight sections.
C90200 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 |
|---|---|---|
| Sn | 6 – 8 | 7 |
| Pb | ≤ 0.3 | |
| Zn | ≤ 0.5 | |
| Fe | ≤ 0.2 | |
| NiNi incl. Co | ≤ 0.5 | |
| Sb | ≤ 0.2 | |
| S | ≤ 0.05 | |
| P | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| CuCu + named elements ≥ 99.4% | ≥ 91 (balance) |
What surface finishes work on C90200?
Not anodizable; finish by machining/polishing, chemical patination (statuary brown/green), tin or nickel plating for potable-water service, and lacquer to hold bright colour.
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 C90200 cost?
C90200 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.
C90200 — frequently asked
What is C90200 used for?
C90200 is typically used for valve bodies, pump parts, bearings and fittings. In short: general-purpose tin bronze; pressure-tight castings; unleaded, ductile at 30 %.
What is the yield strength of C90200?
C90200 has a typical yield strength of 124 MPa (18 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 78% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C90200 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Machinability ≈30% of free-cutting brass — gummy without lead; use sharp positive-rake carbide, high speed, light feed and good lubrication; continuous-cast stock machines best.
Can C90200 be welded?
With care — weldability is rated fair (45/100). Braze and solder readily; arc/gas welding is fair — use ERCuSn-A filler, preheat 150–200 °C and avoid heavy restraint to prevent hot cracking.
What surface finishes work on C90200?
Not anodizable; finish by machining/polishing, chemical patination (statuary brown/green), tin or nickel plating for potable-water service, and lacquer to hold bright colour.
Can C90200 be formed, bent or molded?
Casting alloy only (no wrought forms); long freezing range means directional solidification with generous risers and chills is needed for pressure-tight sections.
What is the maximum service temperature of C90200?
C90200 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C90200-M01 and C90200-M07?
M01 is the default condition — standard general-purpose sand-cast condition for valve bodies, fittings and pressure-tight castings. M07: best choice for stock bar/tube to be machined: fine grain, low porosity, highest as-cast strength. Yield strength is 124 MPa in M01 versus 145 MPa in M07.
How much does C90200 cost?
C90200 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 B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- CDA Standard Designation C90200 alloy datasheet — Copper Development Association (copper.org) (2024)
- 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.