H4R controlled low hydrogen classification
Excellent impact toughness
Excellent resistance to hydrogen-induced cracking
Superior mechanical properties
Product Overview
ISOARC E7018-H4R is a premium basic-coated low hydrogen electrode specifically developed for the welding of carbon and low alloy steels in critical fabrication where weld quality, toughness and resistance to hydrogen cracking are essential.
Manufactured using tightly controlled production processes and rigorous quality assurance, ISOARC E7018-H4R provides exceptionally low diffusible hydrogen levels, excellent mechanical properties and outstanding moisture resistance. The electrode delivers smooth arc characteristics, easy restriking, excellent slag removal and superior weld appearance while complying with the stringent quality requirements demanded by the petrochemical, power generation, mining and heavy engineering industries.
Typical Applications
For use on petrochemical plants
Oil and gas facilities
Power Stations
Pressure vessels
Technical Specifications
Classification
AWS A5.5 E7018-H4R
Type
Basic type coating
Current
AC or DCEP
Welding Positions
All positions except vertical down
Typical Use
High Speed maximum deposition
Redrying Temperature
If electrodes become moist redry at 300 deg C for 1 - 2 hours
Storage
Keep dry and in vacuum sealed packets
Mechanical Properties
Tensile Strength
470 - 540 Mpa
Yield Strength
> 22%
Elongation
420 - 440 Mpa
Chemical Composition
C 0.05 - 0.08
Mn 0.9 - 1.2
Si 0.06 - 0.09
P < 0.025
S < 0.025
Hydrogen < 4ml/100g
Why Choose E7018-H4R C5
Manufactured by Thuthuka Welding Products (Pty) Ltd
This electrode has a smooth stable arc while performing consistently