Rolex Metal Industries (India)

Chemical Composition Of Phosphor Bronze

Normal Composition

Material
Grade

Sn(%)

P(%)

Pb(%)

Zn(%)

Total
Imp (%)

Cu(%)

I

3.5-4.5

0.02-.40

0.02Max

0.30Max

0.50 Max

Rem.

II

4.5-5.5

 0.02-0.40

0.02Max

0.30Max

0.50 Max

Rem.

III

5.5-7.5

 0.02-0.40

0.02Max

0.30Max

0.50 Max

Rem.

* Available in Sheets and Circles form.

Phosphor Bronze - Typical Mechanical Properties

Material

Temper

Vickers Hardness
VPN

PHOSPHOR
BRONZE GRADE-I

O
1/4 H
1/2 H
H
EH

80 max
100 Min
150 Min
180 Min
180 Min

PHOSPHOR
BRONZE GRADE-II

O
1/4 H
1/2 H
H
EH
SH

85 max
110 Min
160 Min
180 Min
200 Min
230 Max

PHOSPHOR
BRONZE GRADE-III

O
1/4 H
1/2 H
H
EH
SH
ESH

9 max
115 Min
170 Min
200 Min
215 Min
240 Max
240 Min