Copper Alloy C63000-H04
Supply condition
UNS C63000 · ASTM B150 · EN CW307G, CuAl10Ni5Fe4 · GB QAl10-4-4
H04 = full hard
Small-diameter cold-drawn rod and wire where higher yield strength and better surface/straightness are wanted; ductility is reduced.
Values for the H04 condition
Other C63000 tempers and conditions
C63000 is listed in 8 conditions; see the grade overview at C63000.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Softened condition (slow-cooled anneal) used for maximum ductility before further hot/cold forming or machining of complex parts. | 310 | 655 | 25 | 150 HB | 7.2 % IACS |
Hot rolled and annealed | Hot-rolled plate/bar fully annealed for maximum ductility and lowest residual stress at somewhat reduced strength. | 325 | 655 | 20 | 170 HB | 7 % IACS |
Hot Extruded and Temper Annealed | Extruded nickel-aluminium bronze given a temper (sub-critical) anneal to stabilise the structure and relieve residual stress with only slight strength loss. | 340 | 670 | 18 | 180 HB | 7 % IACS |
As hot extruded | Cheapest as-supplied condition for large sections and forging stock where only nominal strength is required. | 345 | 690 | 20 | 170 HB | 7 % IACS |
As hot forged and air cooled | Nickel-aluminium bronze forged to shape and air cooled from the hot-working temperature; retains a fine worked structure with high strength and good toughness. | 380 | 690 | 13 | 197 HB | 7 % IACS |
HR50Default Hot rolled / hot finished to specified hardness | Standard stocked condition for ASTM B150 / AMS 4640 nickel-aluminium bronze rod, bar and shapes for marine shafting and valve stems. | 415 | 760 | 15 | 197 HB | 7 % IACS |
Quench hardened and temper annealed | Choose when maximum and most uniform strength/hardness through heavy sections is needed (heavy forgings, landing-gear bushings, high-load stems). | 485 | 825 | 12 | 212 HB | — |
H04This page Full hard | Small-diameter cold-drawn rod and wire where higher yield strength and better surface/straightness are wanted; ductility is reduced. | 550 | 830 | 10 | 19 HRC | 6.5 % IACS |
What is C63000-H04?
C63000-H04 is C63000 supplied in the H04 condition — small-diameter cold-drawn rod and wire where higher yield strength and better surface/straightness are wanted; ductility is reduced. C63000-H04 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 117 GPa (17 Msi). C63000-H04 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,043°C (1,909 °F). HR50 is the default condition FabDigit quotes; H04 is available on request or by drawing note.
Advantages
- Lightweight — 7.58 g/cm³ (0.274 lb/in³), better than 94% of copper alloy grades
- High strength — 550 MPa (79.8 ksi), better than 92% of copper alloy grades
- Good corrosion resistance — 76/100, better than 91% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
Limitations
- Low electrical conductivity — 6.5 % IACS, worse than 91% of copper alloy grades
- Poor heat conductor — 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 85% of copper alloy grades
- Limited formability — 15/100, worse than 79% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
C63000-H04 properties
Typical room-temperature values for C63000-H04; 22 are specific to this condition. Other listed values are C63000 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C63000-H04 has a density of 7.58 g/cm³ (0.274 lb/in³), lighter than 94% of copper alloy grades. It melts at 1,043°C (1,909 °F).
Mechanical14
C63000-H04 has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C63000-H04 is rated for continuous service to 250°C (482 °F). It conducts heat at 37 W/m·K (21.4 BTU/hr·ft·°F), worse than 85% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C63000-H04 conducts electricity at 6.5 % IACS, worse than 91% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 91% of copper alloy grades.
Sustainability4
Producing a kilogram of C63000-H04 takes about 62 MJ of energy and emits 3.9 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C63000-H04's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability good (60/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C63000-H04
Is C63000 easy to machine?
Machines like a tough duplex material: rigid setups, sharp carbide with positive rake, 60–120 m/min, heavy feed and flood coolant to avoid work hardening and gummy chips (rating ≈30% of free-cutting brass).
Can C63000 be welded?
GTAW/GMAW with matching C63000/NAB filler works well; preheat 150–250 °C for heavy sections, avoid excessive heat input and interpass oxide entrapment, no post-weld quench required.
Can C63000 be formed, bent or molded?
Hot work 700–900 °C (excellent forgeability); cold forming is poor — limit to gentle bends with generous radii and interstage annealing.
What surface finishes work on C63000?
Not anodisable; use fine polishing, shot blasting or chemical patination, and avoid electroplating unless a nickel strike is applied over the Al-oxide film.
C63000 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 |
|---|---|---|
| Al | 9 – 11 | 10 |
| NiNi + Co | 4 – 5.5 | 4.8 |
| Fe | 2 – 4 | 3 |
| Mn | ≤ 1.5 | 0.8 |
| Si | ≤ 0.25 | — |
| Zn | ≤ 0.3 | — |
| Sn | ≤ 0.2 | — |
| Pb | ≤ 0.02 | — |
| Curemainder, 78% min | ≥ 78 (balance) | — |
C63000-H04 — frequently asked
What is C63000-H04 used for?
C63000-H04 is typically used for marine propeller shafting, valve stems, pump sleeves and bushings, aircraft landing-gear bushings, aircraft bearings and heavy-duty gears. In short: extremely tough bronze.
What is the yield strength of C63000-H04?
C63000-H04 has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 92% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C63000-H04 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Machines like a tough duplex material: rigid setups, sharp carbide with positive rake, 60–120 m/min, heavy feed and flood coolant to avoid work hardening and gummy chips (rating ≈30% of free-cutting brass).
Can C63000-H04 be welded?
Yes — weldability is rated good (60/100). GTAW/GMAW with matching C63000/NAB filler works well; preheat 150–250 °C for heavy sections, avoid excessive heat input and interpass oxide entrapment, no post-weld quench required.
What surface finishes work on C63000-H04?
Not anodisable; use fine polishing, shot blasting or chemical patination, and avoid electroplating unless a nickel strike is applied over the Al-oxide film.
Can C63000-H04 be formed, bent or molded?
Hot work 700–900 °C (excellent forgeability); cold forming is poor — limit to gentle bends with generous radii and interstage annealing.
What is the maximum service temperature of C63000-H04?
C63000-H04 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 C63000-HR50 and C63000-H04?
HR50 is the default condition — standard stocked condition for ASTM B150 / AMS 4640 nickel-aluminium bronze rod, bar and shapes for marine shafting and valve stems. H04: small-diameter cold-drawn rod and wire where higher yield strength and better surface/straightness are wanted; ductility is reduced. Yield strength is 415 MPa in HR50 versus 550 MPa in H04.
Can FabDigit make parts in C63000-H04?
Yes — C63000-H04 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B150/B150M — Aluminum Bronze Rod, Bar and Shapes — ASTM (2019)
- AMS 4640 — Nickel-Aluminum Bronze Bar, Rod, Shapes, Forgings — SAE International (2018)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM (2019)
- CDA Alloy Datasheet C63000 (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13C — Corrosion: Environments and Industries — ASM International (2006)
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.