• Ark Welding Covered Electrode System 1
Ark Welding Covered Electrode

Ark Welding Covered Electrode

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100 Boxes carton
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SF-0  SF SF-2SF-3

 

Arc welding covered electrode

 

SF-0  low hydrogen type    tip color  green

 

SF    low hydrogen type    tip color  violet

 

SF-2  lime-titania type      tip color  vermilion

 

SF-3  low hydrogen type    tip color  orange

 

APPLICATIONS : SF series is used for direct armour (hard facing) of cast iron metal molds.

 

CHARACTERISTICS

  1. You can overlay directly to the cast iron with these electrodes, and can obtain the predetermined hardness at the 2-3rd layer.

  2. The first layer changes to austenite and the 2-3rd layer changes to martensite.

  3. You do not have to underlay, and can armour with one kind of electrode.

  4. SF-0 , SF are good for armour to the cutting-edge because of their high hardness.

  5. SF-2, SF-3 are good for the drawing die and for bead-laying.

 

NOTE ON WELDING OPERATION

  1. It is effective for preventing the cracks to weld with preheating of about 100°C and with interpass temperature. Over 150°C preheating and interpass temperature should be avoided.

  2. Adopt the arc starting plate method or the backstep welding method, because the start part tends to generate blowholes.

  3. Weld with the current as low as possible. The arc length should be short, the weaving should avoid, and the bead length should limit to about 100 mm, and be sure to perform peening.

  4. Re-dry the electrode for 30-60 minutes at 200-300°C before using.

 

TYPICAL HARDNESS OF WELDED METAL (as welded)

 

Product No.

1st layer(HV)

2nd layer(HV)

3rd layer(HV)

SF-0

440-540

550-650

600-700

SF

250-350

460-560

460-560

SF-2

250-350

460-540

440-500

SF-3

250-350

360-440

360-440

 

OPTIMUM WELDING CURRENT (AC or DC +)

 

Diameter(mm)

2.6

3.2

4

Length(mm)

300

350

400

Current(A)

70-90

90-110

110-130

 

Q:What is the difference between A507 welding rod and J507?
J507 is the structural steel welding rod, A507 has not touched, I don't know! I have a book. If you need me, look for it! A507 may be aluminum or steel electrode does not show, you will not find you, you do not give points,!!
Q:It's expired. What color is it? It's better to have screenshots
Sure.Welding rod can not be damp, otherwise it will seriously affect weld quality.
Q:A022 what kind of material is the welding rod?
A022 E316L-16 welding equipment for urea and synthetic fiber
Q:What welding Q235 and 16 steel, please enlighten Masters
In the past, high strength welding was used to reduce the strength of the lower material. Therefore, E43 series welding rod should be adopted and E50 series should not be used
Q:What welding rod should be used for welding between No. 20 and No. 45 steel?
J427When welding, pay attention to the small current at the bottom, and the weldability of No. 45 steel is poor
Q:What type of welding machine does not use electrode welding machine?
The welding machine without electrode is of the same type, that is, common standard welder.Because the welding machine interface size can be adjusted, you can use a variety of electrodes. Instead of an electrode with a welding machine.The electrode (covered electrode) is a strip of metal gas welding or welding when the filler metal in the joint welding of the workpiece. The electrode material is usually the same as the material of the workpiece.
Q:What is the difference between tin strip and electrode?
Tin bars are welded by welding iron, used in electronic products and welding electrodes, and used in Engineering (for example, construction, shipbuilding).
Q:When 507560 electrodes are used at the same time, which electrode should be selected?
Should be 506 electrodes bar, J507 is DC alkaline welding rod, and J506 is AC and DC dual basic electrode.Their selection depends mainly on the welding properties, if welding welding seam is important, the general should use J507 electrode; if the weld is not high, is connected to weld, then select the J506 electrode.In addition, if only the AC power supply, you can only choose J506 electrode.In short, under normal circumstances, the basic electrode should try to choose the DC power supply electrode, because it tends to be less than the gas and DC welding electrode.
Q:2.5 what is the current of the welding rod sheet?
Welding sheet iron generally use 43 kg class acid electrode J422, current in 80-100A, welding thin sheet iron current should not be too small, the current is too small, but easy to weld through.
Q:How are the electrodes made up?
The electrode composition is divided into two parts, metal core and coating (coating). It is composed of manganese, silicon, chromium, nickel, iron alloy, organic substance and so on.Core: generally use low carbon steel as the core, and adding manganese, silicon, chromium, nickel and other ingredients.Coating: Minerals (such as marble, fluorite etc.), iron alloy and metal powder (such as manganese, ferro titanium), organic matter (such as wood powder, starch), chemical products (such as titanium dioxide, water glass, etc.).
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