Copper Alloy C95400-HT
Heat-treated state
UNS C95400 · ASTM B148 C95400 · EN CuAl10Fe3
Pick when maximum strength, hardness and wear resistance are needed (heavily loaded worm gears, dies, bearing sleeves) and when de-aluminification resistance must be improved.
Values for the HT condition
Other C95400 tempers and conditions
C95400 is listed in 3 conditions; see the grade overview at C95400.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As CastDefault sand/centrifugal cast, no heat treatment (ASTM B148 C95400) | Default stocked condition for gears, bushings and valve components where 586 MPa UTS and ~170 HB are sufficient. | 241 | 586 | 12 | 170 HB | 13 % IACS |
continuous/permanent-mould cast bar and tube (ASTM B505 C95400) | Choose for machined bushings and sleeves cut from bar/tube stock: finer, denser structure than sand cast with slightly higher strength and better machined-surface quality. | 262 | 620 | 12 | 175 HB | 13 % IACS |
HTThis page quenched from ~870 °C and tempered ~600 °C (ASTM B148 C95400-HT) | Pick when maximum strength, hardness and wear resistance are needed (heavily loaded worm gears, dies, bearing sleeves) and when de-aluminification resistance must be improved. | 372 | 758 | 8 | 18 HRC | — |
What is C95400-HT?
C95400-HT is C95400 heat treated to HT — pick when maximum strength, hardness and wear resistance are needed (heavily loaded worm gears, dies, bearing sleeves) and when de-aluminification resistance must be improved. C95400-HT has a yield strength of 372 MPa (54 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi). C95400-HT has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 99% of copper alloy grades. It melts at 1,038°C (1,900 °F). As Cast is the default condition FabDigit quotes; HT is available on request or by drawing note.
Advantages
- Lightweight — 7.45 g/cm³ (0.269 lb/in³), better than 99% of copper alloy grades
- Good corrosion resistance — 78/100, better than 94% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
- High strength — 372 MPa (54 ksi), better than 75% of copper alloy grades
Limitations
- Limited ductility — 8%, worse than 83% of copper alloy grades
C95400-HT properties
Typical room-temperature values for C95400-HT; 13 are specific to this condition. Other listed values are C95400 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C95400-HT has a density of 7.45 g/cm³ (0.269 lb/in³), lighter than 99% of copper alloy grades. It melts at 1,038°C (1,900 °F).
Mechanical12
C95400-HT has a yield strength of 372 MPa (54 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 75% of copper alloy grades. Elongation at break is 8% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C95400-HT is rated for continuous service to 300°C (572 °F). It conducts heat at 58.6 W/m·K (33.9 BTU/hr·ft·°F), worse than 63% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C95400-HT conducts electricity at 13 % IACS, worse than 58% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of copper alloy grades.
Sustainability4
Producing a kilogram of C95400-HT takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 50%.
Manufacturability8
C95400-HT's machinability is fair (40/100, better than 57% of copper alloy grades); weldability good (60/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C95400-HT
Is C95400 easy to machine?
Machines at about 60 % of free-cutting brass: tough, gummy chips need sharp positive-rake carbide, rigid setup, moderate speed and generous coolant; HT material is harder and abrasive on tooling.
Can C95400 be welded?
GTAW/GMAW with matching aluminium-bronze filler (ERCuAl-A2) works well with 150–250 °C preheat and clean oxide removal; avoid oxyfuel and soldering because of the tenacious alumina film.
Can C95400 be formed, bent or molded?
Casting alloy — sand, centrifugal and continuous cast; use bottom gating and good filtering to keep alumina dross out, feed heavily due to high solidification shrinkage; not cold formable.
What surface finishes work on C95400?
Takes a good mechanical polish and develops a stable olive-brown patina; not anodizable — use passivation, lacquer or paint for appearance, and electroless nickel/chrome where extra wear resistance is needed.
C95400 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 |
|---|---|---|
| Alprimary strengthening element | 10 – 11.5 | 11 |
| Fegrain refiner, forms κ phases | 3 – 5 | 4 |
| Mn | ≤ 0.5 | 0.2 |
| NiNi + Co | ≤ 1.5 | 0.3 |
| Si | ≤ 0.25 | |
| Zn | ≤ 0.5 | |
| Cu | ≥ 83 (balance) |
C95400-HT — frequently asked
What is C95400-HT used for?
C95400-HT is typically used for aluminum bronze gears and worm wheels, heavy-duty bushings and bearing sleeves, valve seats and valve components, wear plates and gib strips, forming die and press inserts and pump casings and impellers. In short: shock-load bearing bronze.
What is the yield strength of C95400-HT?
C95400-HT has a typical yield strength of 372 MPa (54 ksi) and a tensile strength of 758 MPa (110 ksi) — stronger than 75% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C95400-HT easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Machines at about 60 % of free-cutting brass: tough, gummy chips need sharp positive-rake carbide, rigid setup, moderate speed and generous coolant; HT material is harder and abrasive on tooling.
Can C95400-HT be welded?
Yes — weldability is rated good (60/100). GTAW/GMAW with matching aluminium-bronze filler (ERCuAl-A2) works well with 150–250 °C preheat and clean oxide removal; avoid oxyfuel and soldering because of the tenacious alumina film.
What surface finishes work on C95400-HT?
Takes a good mechanical polish and develops a stable olive-brown patina; not anodizable — use passivation, lacquer or paint for appearance, and electroless nickel/chrome where extra wear resistance is needed.
Can C95400-HT be formed, bent or molded?
Casting alloy — sand, centrifugal and continuous cast; use bottom gating and good filtering to keep alumina dross out, feed heavily due to high solidification shrinkage; not cold formable.
What is the maximum service temperature of C95400-HT?
C95400-HT is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C95400 As Cast and C95400-HT?
As Cast is the default condition — default stocked condition for gears, bushings and valve components where 586 MPa UTS and ~170 HB are sufficient. HT: pick when maximum strength, hardness and wear resistance are needed (heavily loaded worm gears, dies, bearing sleeves) and when de-aluminification resistance must be improved. Yield strength is 241 MPa in As Cast versus 372 MPa in HT.
Can FabDigit make parts in C95400-HT?
Yes — C95400-HT is available for CNC machining with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B148 — Aluminum-Bronze Sand Castings — ASTM (2019)
- ASTM B505/B505M — Continuous Cast Copper Alloy Castings — ASTM (2018)
- CDA Alloy Datasheet C95400 (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- GB/T 1176 (ZCuAl10Fe3) — SAC (2013)
- AMPCO 18 / aluminium bronze product data — AMPCO Metal (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.