Copper Alloy C90700
UNS C90700 · AISI/SAE 65 · EN CuSn10
CuSn10 (C90700, ZCuSn10P1) is a classic tin bronze available as cast tempers M01, M02, M05 and M07, heat-treated stock, and as gas-atomised powder for LPBF and binder jetting including sintered and HIP conditions.
Reference datasheet — C90700 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
C90700 tempers and conditions
C90700 is supplied in 7 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Binder jetted and sintered | Cost-effective route for complex small bearing/decorative parts; residual sintering porosity (3–8 %) lowers strength and conductivity. | 140 | 270 | 8 | 70 HB | 8.5 % IACS |
M01Default As sand cast | Use the standard sand cast gear-bronze condition for worm wheels, bushings and one-off castings to ASTM B427, giving 305 MPa tensile, 80 HB and 12 % elongation without further treatment. | 152 | 305 | 12 | 80 HB | 10.9 % IACS |
Binder jetted, sintered and hot isostatically pressed | HIP closes residual pores for near-full density when pressure tightness or fatigue life is required. | 160 | 330 | 18 | 80 HB | 10.5 % IACS |
As centrifugally cast | Pick for bushings, sleeves and large-bore bearing blanks where a dense, directionally solidified wall is needed. | 175 | 330 | 11 | 90 HB | 10.9 % IACS |
As plaster cast | Chill casting refines the δ-network for higher strength and hardness in series-produced small gears and bushings. | 190 | 340 | 8 | 95 HB | 11 % IACS |
As continuous cast | Most-stocked bar and tube form: dense, low-porosity stock for machined bearings, wear plates and nuts. | 205 | 345 | 9 | 100 HB | 11 % IACS |
Cast and heat treated | Use when maximum gear-tooth hardness and load capacity are required from a C90700 casting; ductility drops sharply. | 250 | 380 | 5 | 120 HB | 11.5 % IACS |
Supply forms, finishes and certifications
Ways C90700 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
LPBF-AB | Laser powder-bed fusion, as-built | Printing process |
LPBF-SR | Laser powder-bed fusion + stress relief | Surface finish |
What is C90700?
CuSn10 (C90700, ZCuSn10P1) is a classic tin bronze available as cast tempers M01, M02, M05 and M07, heat-treated stock, and as gas-atomised powder for LPBF and binder jetting including sintered and HIP conditions. Engineers use it for bearing and wear duty on the strength of 152 MPa yield, 305 MPa tensile, 12% elongation and 80 HB, with good machinability and embedability. Service is limited to about 250 °C, the alloy is hot-short and effectively not fusion weldable, and it cannot be cold formed; CuNi2SiCr is the alternative where higher strength and conductivity are needed. C90700 has a density of 8.77 g/cm³ (0.317 lb/in³), heavier than 52% of copper alloy grades. It melts at 830°C (1,526 °F). C90700 has a yield strength of 152 MPa (22 ksi) and a tensile strength of 305 MPa (44.2 ksi) — weaker than 67% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 110 GPa (16 Msi).
What is C90700 used for?
- bushings
- bearings
- decorative/art castings via AM
- wear plates
Limitations
- Limited formability — 10/100, worse than 89% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C90700 properties
Typical room-temperature values for C90700-M01; bars are the position among copper alloy grades.
Physical3
C90700 has a density of 8.77 g/cm³ (0.317 lb/in³), heavier than 52% of copper alloy grades. It melts at 830°C (1,526 °F).
Mechanical15
C90700 has a yield strength of 152 MPa (22 ksi) and a tensile strength of 305 MPa (44.2 ksi) — weaker than 67% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C90700 is rated for continuous service to 250°C (482 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), worse than 66% of copper alloy grades. Thermal expansion is 18.4 µm/m·K (10.2 µin/in·°F).
Electrical3
C90700 conducts electricity at 10.9 % IACS, worse than 71% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C90700 takes about 62 MJ of energy and emits 4.5 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 45%.
Manufacturability8
C90700's machinability is fair (45/100, better than 64% of copper alloy grades); weldability poor (25/100); 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. C90700 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C90700
Is C90700 easy to machine?
Machines to fine chips with sharp positive-rake carbide or HSS tooling at 20–25 % of free-cutting brass rates; the hard δ-phase is abrasive, so use rigid setups, generous coolant and avoid rubbing to prevent smearing.
Can C90700 be welded?
Fusion welding is not recommended (hot-short, tin oxide inclusions); repair by GTAW with matching phosphor-bronze filler and preheat only when unavoidable — soldering and silver brazing are the preferred joining routes.
Can C90700 be formed, bent or molded?
Not cold formable — supplied as sand, chill, centrifugal or continuous castings, or gas-atomised powder for LPBF/binder jetting; pour 1150–1250 °C with good feeding to avoid inter-dendritic shrinkage porosity.
C90700 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 |
|---|---|---|
| SnZCuSn10P1 nominal 9.0–11.5 | 10 – 12 | 11 |
| Pdeoxidiser; GB ZCuSn10P1 allows 0.5–1.0 P | 0.05 – 0.3 | 0.2 |
| Pb | ≤ 0.5 | |
| Zn | ≤ 0.5 | |
| Niincl. Co | ≤ 0.5 | |
| Fe | ≤ 0.15 | |
| Sb | ≤ 0.2 | |
| S | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| Cu | ≥ 88 (balance) |
What surface finishes work on C90700?
Takes a bright turned or burnished surface, accepts tin, nickel and chrome plating and chemical patination (liver-of-sulphur/brown); no anodising — protect decorative parts with lacquer.
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 C90700 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- AISI / SAE
- 65
- EN / DIN / Werkstoff-Nr.
- CuSn10
- Also called
- QSn10-1
- Similar grades
- ZCuSn10P1
How much does C90700 cost?
C90700 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.
C90700 — frequently asked
What is C90700 used for?
C90700 is typically used for bushings, bearings, decorative/art castings via AM and wear plates. In short: classic bearing bronze; binder-jet and LPBF friendly; good wear and machinability.
What is the yield strength of C90700?
C90700 has a typical yield strength of 152 MPa (22 ksi) and a tensile strength of 305 MPa (44.2 ksi) — weaker than 67% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is C90700 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines to fine chips with sharp positive-rake carbide or HSS tooling at 20–25 % of free-cutting brass rates; the hard δ-phase is abrasive, so use rigid setups, generous coolant and avoid rubbing to prevent smearing.
Can C90700 be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is not recommended (hot-short, tin oxide inclusions); repair by GTAW with matching phosphor-bronze filler and preheat only when unavoidable — soldering and silver brazing are the preferred joining routes.
What surface finishes work on C90700?
Takes a bright turned or burnished surface, accepts tin, nickel and chrome plating and chemical patination (liver-of-sulphur/brown); no anodising — protect decorative parts with lacquer.
Can C90700 be formed, bent or molded?
Not cold formable — supplied as sand, chill, centrifugal or continuous castings, or gas-atomised powder for LPBF/binder jetting; pour 1150–1250 °C with good feeding to avoid inter-dendritic shrinkage porosity.
What is the maximum service temperature of C90700?
C90700 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C90700-M01 and C90700-HT?
M01 is the default condition — use the standard sand cast gear-bronze condition for worm wheels, bushings and one-off castings to ASTM B427, giving 305 MPa tensile, 80 HB and 12 % elongation without further treatment. HT: use when maximum gear-tooth hardness and load capacity are required from a C90700 casting; ductility drops sharply. Yield strength is 152 MPa in M01 versus 250 MPa in HT.
How much does C90700 cost?
C90700 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 B427 — Gear Bronze Alloy Castings — ASTM International (2020)
- ASTM B505/B505M — Continuous Cast Copper Alloy Castings — ASTM International (2018)
- GB/T 1176 — (ZCuSn10P1) — SAC (2013)
- CDA Alloy Datasheet C90700 — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.15 — Casting — ASM International (2008)
- CuSn10 bronze powder for LPBF — material datasheet — SLM Solutions / m4p / Sandvik Osprey (2023)
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.