Spring Cu Alloy · Phosphor Bronze
Copper Alloy C51900
Copper Alloy C51900 is a spring copper alloy — spring-grade phosphor bronze. Typical values: 380 MPa yield, 8.86 g/cm³, rated to 200 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values for the default supply condition. Metric first, imperial in gray. The bars show where C51900 sits against the other 36 copper alloy grades in the catalog.
Datasheet
| Yield strength | 380 MPa55 ksi |
|---|---|
| Tensile strength | 470 MPa68 ksi |
| Hardness | 85 HRB≈ 168 HB |
| Density | 8.86 g/cm³0.32 lb/in³ |
| Specific strength (yield ÷ density) | 43 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 200 °C392 °F |
| Electrical conductivity | 10 % IACS5.8 MS/m |
| Machinability | Good55 / 100 |
| Weldability | Good65 / 100 |
| Formability | Very good72 / 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. C51900 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to C51900. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better55 / 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 | Better72 / 100 |
|---|---|
| Weldability | Better65 / 100 |
| Bendable | Yes |
Surface finishes for C51900
Coatings and treatments compatible with copper alloy on the processes C51900 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 C51900 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuSn6CW452K2.1020
- Also called
- Phosphor BronzePhosphor Bronze 6%C
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.