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The electrodes TMU - 21U

WELDING ELECTRODES TMU-21U (diameter 3; 4; 5 mm)

CLASSIFICATION: E50A in accordance with GOST 9466

LEGEND: E50A - TMU-21U - Ø - UD
                     E - 51 3 - B30

TECHNICAL REQUIREMENTS: GOST 9466-75, GOST 9467-75i TU RB 100034500.018-2007

COATING: main

PURPOSE:

Intended for welding of steel structures, pipelines, pipes and other tubular members made of carbon and low-alloy structural steels in all positions seam, except vertical "top-down", direct current reverse polarity.

CHARACTERISTICS Electrodes:

arcing

sustainable;

splashing degree

small

formation of the joint

good;

Separation of the slag crust

good

The tendency of the weld metal to pore formation

low;

deposition rate (in the lower position of the weld)

9.0-9.5 g / Ah;

deposition rate (electrode diameter 4.0 mm)

1,2-1,6 kg / h;

Electrode consumption per 1 kg of weld metal

1.5 kg;

Typical mechanical properties of weld metal (at 20 ° C):

Tensile strength, MPa

Yield strength, MPa

Relative extension, %

Impact toughness J / cm2

520

420

22

130

Chemical composition of deposited metal:

Element content,%

Carbon

Manganese

Silicon

Sulfur

Phosphorus

0.06-0.12

0.6-1.0

0,20-0,43

No more than 0,030

No more than 0,035

DIRECTIONS FOR USE:

In case of exceeding the permissible moisture content in the coating (0.3%) prior to use electrodes must be further calcined at a temperature of 380-400 ° C. calcining time of from 40 to 60 minutes.

welding conditions (current) must be as specified in Table

WELDING MODES:

Electrode diameter mm

Welding current, A

joint position

Underwear

vertical

ceiling

3

100-130

60-120

90-120

4

130-180

120-160

120-160

5

170-210

160-210

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