UNS/CDA C68000
NICKEL BRONZE

 


Specifications

AWS A5.27 Class RBCuZn-B
ASME SFA5.7 Class RBCuZn-B
QQ-R-571C, MIL-R-19631B
Type RcuZn-B

Description
  Nickel Bronze (also referred to as Manganese Bronze) is similar to Naval Bronze, however iron, manganese and nickel have been added to the analysis. The iron and manganese increases the hardness and strength of the weld deposit while nickel ensures uniform distribution of iron in the deposit. Nickel Bronze is primarily used to braze or oxyacetylene weld steel, cast iron, brass and bronze. Also used for building-up wearing surfaces and bearings. Flux required. Use a boric acid or borax commercial flux. A neutral or slightly oxidizing flame should be used. Preheating may be required for some applications.

Chemical Composition
(%max., unless shown as range or min.)

 

Cu(1)

Al

Fe

Pb

Mn

Ni(2)

Si

Sn

Zn

Min./Max.

56.0-60.0

.01

.25-1.25

.05

.01-.50

.20-.8

.04-.15

.75-1.10

Rem.

Nominal

58.0

-

.8

-

.25

.50

.09

.92

-

(1) Cu value includes Ag.
(2) Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.5% min.

Applicable Specifications

Product

Specification

Rod, Welding

AWS A5.15, A5.27

 

Physical Properties

 

US Customary

Metric

Density

0.296 lb/in3
at 68 F

8.19 gm/cm3
@ 20 C

Specific Gravity

8.19

8.19


Typical Uses

Industrial
Welding Rod for Cast Iron