Brass reference / Tin brass
C464 naval brass
About 1 percent tin added for seawater and dezincification resistance, at a heavy cost in machinability.
Also known as Naval brass, Tobin bronze, Alloy 464. Published typical values for the alloy, never a promise from a shop.
30Machinability, C360 = 100
under 0.20%Lead, under the 0.25% line
HighDezincification resistance
380 to 600 MPaTypical tensile strength
Composition
| Element | Nominal weight % |
|---|---|
| Copper | 59.0 to 62.0 |
| Tin | 0.50 to 1.0 |
| Lead | 0.20 max |
| Zinc | remainder |
Properties
- UNSC46400
- EN equivalentCuZn38Sn1 / CW712R
- Hardness55 to 80 HRB
- Density8.41 g/cm3
- Typical tolerance±0.02 mm typical
- Common formsRound bar, plate, forging stock
What it is for, and what it is not
Specify it for
- Seawater and marine hardware
- Heat exchanger and condenser components
- Hot water service above roughly 60 degrees Celsius
- Parts where the environment strips zinc from ordinary brass
Do not specify it for
- Anything chosen on price, it is rated 30 against C360 at 100
- High volume turned parts in dry service
- Parts where C360 would survive the environment
What a buyer should know
The tin suppresses dezincification, the failure mode where zinc leaches out of brass and leaves a porous copper sponge. That rating of 30 is the price you pay: long chips and slow cycles. Specify it because the environment demands it, never because it sounds like a stronger material.
Closest alternatives
| Alloy | Lead % | Mach. | DZR | Why you might switch |
|---|---|---|---|---|
| C260 cartridge brassC26000 | trace | 30 | Poor | Made for deep drawing and cold forming, not for cutting, and rated 30 against C360 at 100. |
| C377 forging brassC37700 | 1.5 to 2.5 | 80 | Poor | Hot forged to a near net shape then machined only where a sealing face or thread requires it. |
| C69300 silicon brassC69300 | under 0.09 | 80 | High | The usual lead-free answer for potable water, roughly twice as strong as C360 and highly dezincification resistant. |
Need a shop that runs C464?
Send the drawing and we match it with up to 3 shops that turn brass. Free for buyers, reply within 24 business hours.