EMI RFI Shield Plating Inc

Silver Plating In Canada

ASTM B700 ADD PURITY

Silver Plating in Canada in accordance with QQ-S-365, ASTM B700

Silver is used in electrical applications because of its excellent conductivity. Although its corrosion resistance is inferior to gold, it serves as an economical coating on electrical conductors designed to operate at higher current in less critical applications. Silver is also used as a bearing surface. Silver Plate per QQ-S-365 Type I Grade A/B is a matte finish, Silver Plate per QQ-S-365 Type II Grade A/B is a semi-bright finish, and Silver Plate per QQ-S-365 Type III Grade A/B is a bright finish. The Grade is used to specify chromate anti-tarnish post-plating. The ASTM B700 uses the Type reference to specify plate purity, the Grade reference to specify the finish, and the anti-tarnish treatment is specified by the Class reference.

silver plating in canada
Specification Specification
QQ-S-365
Types
I
Matte
II
Semi-Bright
III
Bright
Grades
A
With supplementary tarnish resistant treatment (Chromate treatment)
B
Without supplementary tarnish resistant treatment
ASTM B700
Types (Purity)
1
99.9 % minimum Silver
2
99.0 % minimum Silver
3
98.0 % minimum Silver
Grades (Surface Appearance)
A
Matte
B
Bright
D
Semi-Bright
Classes (Supplementary Surface Treatment)
N
No Supplementary tarnish resistant treatment
S
With supplementary tarnish resistant treatment (Chromate treatment)