No.

Index name

3112 3122 3113

3123 3114 3124

3212 3222 3213

3223 3214 3224

3313

1

Cleanliness

a. The surface is clean and the texture is uniform, and no impurities are allowed
. b. There is no obvious color difference in the cross section of the 57mm rod

The surface is clean, the texture is uniform, no metal impurities are allowed, and no more than 2 impurities less than or equal to 1mm

The surface is not clean, the texture is uneven, or there are small metal impurities, more than 2 impurities less than or equal to 1mm

2

Tensile strength MP≥

25.5

22.5

16.0

3

Elongation%

250

250

200

4

Moisture content%

0.04

0.04

0.05

5

Melting point °C

327±5

327±5

-

6

Standard relative density

2.13-2.18

2.13-2.18

-

7

Thermal instability index ≤

50

50

-

8

Electric strength MV/m ≥

60

-

-