Heat input for rods min/max

[kevlar49]

When a manufacturer posts guidelines for volts/amps/travel for their rod? Are they suggested min/max heat input or just where the optimal performance is? .e.g

http://products.esab.com/Templates/T041.asp?id=2464

 

[qcrobert]

I did not see any guidelines at the link you posted but usually a manufacturer will list the min/max volts/amps range for each electrode, not optimal performance.

This is only a guideline and you would need to qualify a welding procedure to determine the actual volt/amp range for your particular application.

 

[heathot]

Normally welding consumables manufacturers suggest the range of electrical parameters to be used during welding.
In the "specifications" page of the link you have provided you can see that it is suggested a certain voltage and a range of current.
Optimal welding parameters (not only electrical, but also travel speed, type of bead, welding position, ...) are related to many factors and can hardly be summarized in a catalog.
The "typical mecanichal properties" as shown in catalogs are generally reached in optimal condition: flat position, string bead, optimal electrical parameters, controlled heat input, ...
As general rule heat input should be kept as low as possible.

 

[blacksmith37]

In reading the mfgr info , I see a few "red flags".
I see no AWS designation, so I assume it does not meet any. It mentions "low alloy" and "no stress relieving" : a welding engr hates to see those two in the same sentence. I assume this rod produces a high strength weld metal : Do you need that ?
Lincoln marketed HYP (high yield pipe) electrodes (No AWS designation for years, eventually they called it E8010 G), this electrode caused many problems because the weldors loved to use it (where it should not have been used).
Why aren't you using MIG ? Flux core, gas shielded -whatever.

 

[metengr]

The above mentioned SMAW weld rod OK 48.00 by esab does have an AWS classification, read the Specifications tab next to the features tab. With that said, the stated vols and amps are considered recommended values based on testing performed by the electrode manufacturer.

 

[kevlar49]

blacksmith,

Actually, I am actually working with 7018 rod. Spec sheet given as an example. Thanks.

 

[blacksmith37]

Oooops; new to this site; I "spoke" too soon.
7018 is commonly used in refineries : as I remember it often contained a little alloy ,like suffix G or A1.