How to weld
SSAB offers suggestions for suitable consumables for the welding of Hardox® and Strenx®. Note that the consumables listed are only examples. In addition to these, there are numerous suitable products that meet the recommendations from SSAB.
The consumables are classified into two main groups. The most common alternatives are unalloyed and low-alloyed grades. The second type is stainless steel consumables.
In the last part suitable handling conditions are described.
The toughness values in the weld metal
The consumables with the appropriate strengths for welding the Hardox® wear plate and Strenx® performance steel grades can, in many cases, attain favorable toughness values in the all weld metal.
Unalloyed and low-alloyed consumables
Unalloyed and low-alloyed consumables should meet the specified strength criteria.
Hydrogen content
The hydrogen content of consumables depends on factors such as the welding method used. The types of consumables that can fulfill the recommended hydrogen level is stated in the table below.
Preheat/interpass temperatures due to consumable properties
When welding with consumables with yield strengths (R ₚ₀.₂) up to 690 MPa the consumable properties typically don’t influence the minimum preheat temperature of the joint. The reason is that the carbon equivalent, CET, of the parent metal typically exceeds that of the weld metal by at least 0.03 units of percentage.
High strength, low-alloy consumables with yield strengths (Rₚ₀.₂) higher than 700 MPa
Strenx® performance steel 900–1300 types are frequently welded with consumables that have yield strengths of about 750–1100 MPa in the all-weld metal.
Examples of suitable MAG solid wires
The consumables are arranged according to the yield strength (Rₚ₀.₂) for which they are classified. In reality, a given consumable normally has a higher yield strength than its standard designation. The mechanical properties of a given consumable can be obtained from its manufacturer.
Examples of suitable MAG flux cored wires
The consumables are arranged according to the yield strength (Rₚ₀.₂) for which they are classified. In reality, a given consumable normally has a higher yield strength than its standard designation. The mechanical properties of a given consumable can be obtained from its manufacturer.
Examples of suitable MAG metal cored wires
The consumables are arranged according to the yield strength (Rₚ₀.₂) for which they are classified. In reality, a given consumable normally has a higher yield strength than its standard designation. The mechanical properties of a given consumable can be obtained from its manufacturer.
Examples of suitable MMA electrodes
The consumables are arranged according to the yield strength (Rₚ₀.₂) for which they are classified. In reality, a given consumable normally has a higher yield strength than its standard designation. The mechanical properties of a given consumable can be obtained from its manufacturer.
Examples of suitable SAW flux and wire combinations
Hardox® and Strenx® can always be welded with austenitic stainless steel consumables of type AWS 307.
Handling of consumables
In order to achieve the intended hydrogen content, it is important that the consumables are handled in accordance with their manufacturer.