Page 134 - Welder - TT - Marathi

FIVE DIGITS CODIFICATION

Electrode  E
1
1
Tensile strength
110,000 psi.  0

All position  1
electrode

Low hydrogen lime  8
plus iron powder

*To get the tensile strength of the weld in p.s.i., the number given
here should be multiplied by 1000.

CHART 2 (BS 639 : 1976 equivalent to ISO 2560)

COVERING 4 ELECTRODE
EFFICIENCY
A Acid (iron oxide) 5
AR Acid (rutile)
B Basic % recovery
STRENGTH 2 C Cellulosic to nearest
O Oxidising 10% (> 110)
Electrode Tensile Minimum yield R Rutile (medium coated)
designation strength stress. N/mm 2 RR Rutile (heavy coated) (H) 8
N/mm 2 S Other types Indicates

E43 430.550 330 hydrogen
E51 510.650 360 controlled
(> 15mg/100g)
Example (b) E 51 33 B 160 2 0 (H)

1 2 3 4 5 6 7 8
PROCESS
1

Covered WELDING POSITION 6
MMA 1 All positions
electrode 2 All positions except vertical down
3 Flat and, for fillet welds, horizontal vertical
4 Flat
5 Flat, vertical down and, flat fillet welds, horizontal
vertical
6 Any position or combination of positions not clas-
sified above.

112 C G & M : वेल्डर (NSQF -उजळिी 2022) एक्सरसाईस साठी संबंधित धिअरी 1.3.48