Machining-Friendly Cu Alloy · Phosphor Bronze
Copper Alloy C54400
Copper Alloy C54400 is a machining-friendly copper alloy — free-machining phosphor bronze. Typical values: 345 MPa yield, 8.89 g/cm³, rated to 200 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the H04 (full Hard) condition. Metric first, imperial in gray. The bars show where C54400 sits against the other 36 copper alloy grades in the catalog.
Datasheet
| Yield strength | 345 MPa50 ksi |
|---|---|
| Tensile strength | 470 MPa68 ksi |
| Hardness | 85 HRB≈ 168 HB |
| Density | 8.89 g/cm³0.321 lb/in³ |
| Specific strength (yield ÷ density) | 39 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 200 °C392 °F |
| Electrical conductivity | 11 % IACS6.4 MS/m |
| Machinability | Excellent85 / 100 |
| Weldability | Poor15 / 100 |
| Formability | Fair40 / 100 |
| ISO 513 machining group | N |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other copper alloy grades
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C54400 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to C54400. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Excellent85 / 100 |
|---|---|
| ISO material group | N.5 |
| Cutting speed (rough / finish) | 180 / 220 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Fair40 / 100 |
|---|---|
| Weldability | Fair15 / 100 |
| Bendable | Yes |
Conditions and tempers
How C54400 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
H04Default Full Hard (H04) | Full-hard — electrical contacts, flat springs; no forming | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on C54400, ranked by how often they make sense for this grade.
Heat treatment
| Full Anneal | Restore ductility; relieve residual stress; coarsen grain |
|---|---|
| Stress Relief | Reduce residual stress without changing structure |
| Age C17200 (Beryllium Cu) | Cu-Be peak strength (TF00) |
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for C54400
Coatings and treatments compatible with copper alloy on the processes C54400 runs on. Pick them in the quote configurator or call them out on the drawing.
Passivation
- Electropolishing
Plating
- Chrome Plating
- Copper Plating
- Electroless Nickel (EN)
- Gold Plating
- Nickel Plating
- Silver Plating
- Tin Plating
Organic Coating
- Painting
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Copper Alloy C54400 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- Free-Machining Phosphor Bronze
- Other
- 544
Stock forms
Raw-material forms FabDigit sources C54400 in.
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.