Diameter, inch (mm)

Tolerance, +/-inch (mm)

0.125~0.187 excl (3.175~4.750)

0.003 (0.076)

0.187~0.375 excl (4.750~9.525)

0.004 (0.102)

0.375~0.500 excl (9.525~12.70)

0.005 (0.127)

0.500~0.625 excl (12.70~15.88)

0.007 (0.178)

0.625~0.750 excl (15.88~19.05)

0.008 (0.203)

0.750~1.000 excl (19.05~25.40)

0.010 (0.254)

1.000~1.500 excl (25.40~38.10)

0.015 (0.381)

1.500~2.000 excl (38.10~50.80)

0.020 (0.508)

2.000~2.500 excl (50.80~63.50)

0.030 (0.762)

Chemistry                                                                %

Designation

Chief component

Impurities  maxmium

Ta

Nb

Fe

Si

Ni

W

Mo

Ti

Nb

O

C

H

N

Ta1

Remainder

0.004

0.003

0.002

0.004

0.004

0.002

0.03

0.015

0.004

0.0015

0.002

Ta2

Remainder

0.01

0.01

0.005

0.02

0.02

0.005

0.08

0.02

0.01

0.0015

0.01