Ark Welding Covered Electrode

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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

You can overlay directly to the cast iron with these electrodes, and can obtain the predetermined hardness at the 2-3rd layer.
The first layer changes to austenite and the 2-3rd layer changes to martensite.
You do not have to underlay, and can armour with one kind of electrode.
SF-0 , SF are good for armour to the cutting-edge because of their high hardness.
SF-2, SF-3 are good for the drawing die and for bead-laying.

NOTE ON WELDING OPERATION

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.
Adopt the arc starting plate method or the backstep welding method, because the start part tends to generate blowholes.
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.
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: 12 chromium vanadium molybdenum with what electrode?: Do you need domestic or imported ones?

Q: What does E4315 mean on the electrode?: E stands for "43" electrode, the tensile strength of the minimum value, "1" means 0 and 1 indicate the position of welding, suitable for all position welding, suitable for welding and 2 horizontal fillet welding, 4 for vertical down welding, welding current "5" type and type of coating.In fact, J427 low hydrogen electrode

Q: Is it used for welding power plant construction?: Base metal is 10, 20 steel with J427Stainless steel with A102

Q: When welding, for example, 3.2 of the electrode should choose how much current: Personal summary of 4 times to the electrode diameter, good to be divided into vertical welding and welding is different, the package has recommended the use of current electrode. 3.2 of the welding rod is between 90-120A and standing 90-100.

Q: Why can not welding machine welding electrode spark?: 1 subway did not catch, 2 medicine skin covered electrode. 3 the current of the welder is too small, the internal circuit of the 4 electric welder

Q: What is the current of 2,6 electrode?: The main specifications of manual arc welding are welding current, welding rod diameter and welding layer. 1) electrode and the current matching parameters of 1.6 2 2.5 3.2 4 electrode diameter 5 5.8 current (A) 25 ~ 4040 ~ 6050 ~ 80100 ~ 130160 ~ 210200 ~ 270260 ~ 300 note: vertical welding, horizontal welding, overhead welding welding current should be smaller than usual 10% ~ 20%. 2) the diameter of the electrode and the diameter of the electrode are usually selected according to the thickness of the component and the position of the welding. When the welding electrode diameter can choose some welding when the electrode diameter is less than 5mm, and the maximum overhead welding horizontal welding electrode diameter is 4mm, and the first layer of multilayer welding groove weld using electrode diameter is 3.2 ~ 4mm. diameter of electrode selection of welding thickness (mm) of 2336 to 12 more than 13 electrode diameter (mm 23.2) 3.2 ~ 44 ~ 54 ~ 6

Q: Welding method of 506 electrode: 506 is AC and DC electrode, but it is better to use dc. With AC welding machine, the no-load voltage can not be too low, otherwise it is easy to stick the strip.

Q: What kind of welding rod is ECoCr-A?: D802 cobalt based electrode

Q: What is bubble welding? What's the difference between a common electrode and an ordinary one?: It should be (gas shielded welding)...... It means gas shielded arc welding! Protect welding with inert gas......

Q: What type of pig iron electrode?: Pig iron electrode is cast iron electrode, the vernacular is the pig iron electrode.Cast iron electrode commonly used model:CMC-E46NDirect welding on cast iron is very effective for metal wear of stamping dies. The first layer of welded metal is austenitic, and the martensite is from the 2 layer, so the wear resistance is good. Flame hardened cast iron can also be directly welded.CMC-MS64NCast iron welding rod, high strength and good plasticity. Suitable for gray cast iron and nodular cast iron, and can be machined.CMC-E47NDirect welding on cast iron is very effective for metal wear of stamping dies. The first layer of welded metal is austenitic, and the martensite is from the 2 layer, so the wear resistance is good. Flame hardened cast iron can also be directly welded.CMC-E67NEspecially suitable for cast steel hardfaced making render buffer layer, cracking of welding, welding reconstruction.CMC-E65NCmc-e65n low temperature welding, low expansion coefficient, slight hardening, especially suitable for cast iron cast steel (fc.fcd) steel hardfaced making render buffer layer.CMC-E61NSuitable for welding all kinds of cast iron, alloy cast iron, steel and cast iron joint, nickel and its alloy, or welding of water proof die castings.WE777 special cast iron welding rodSuitable for the full range of cold welding welding, welding cast iron base material can almost all, and it is easy to achieve cast iron and carbon steel dissimilar metal welding, such as solving matrix fracture, crack, wear, hole filling defects after welding can be machined, many applications in the engine casing, cylinder head, casting machine, gear base the tooth of iron castings.

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