Basic Carbon steel electrodes|J427

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GB：E4315
AWS：
Application：Used for welding vital steel structures under pressure and loads, low-carbon steel thick plate structures and low-alloy steel structures, such as machinery, shipbuilding, bridges, pressure vessels, etc.：

J427

According with GB E4315

Introduction: J427 is a kind of carbon steel electrode with low-hydrogen natrium type coating. DCRP (Direct Current Reversed Polarity). All-position welding. The deposited metal has excellent mechanical properties, crack-resistance and good low temperature impact toughness.

Applications: Used for welding key steel structures under pressure and loads, low-carbon steel thick plate structures and low-alloy steel structures, such as machinery, shipbuilding, bridges, pressure vessels, etc.

Chemical Composition of Deposited Metal (%)

Chemical Composition	C	Mn	Si	S	P
Guarantee Value	≤0.12	≤1.25	≤0.90	≤0.035	≤0.040

Mechanical Properties of Deposited Metal

Test Item	R_m(MPa)	R_eL(Mpa)	A(%)	KV₂(J)	KV₂(J)
Guarantee Value	≥420	≥330	≥22	-(-20℃)	≥27(-30℃)
General Result	460~540	≥340	25~35	110~260(-20℃)	100~240(-30℃)

Diffusible Hydrogen Content in Deposited Metal: ≤8.0ml/100g(Glycerine Hydrogen Test)

X-ray Radiographic Inspection: ⅠDegree

Reference Current (DC+)

Electrode Diameter(mm)	φ2.5	φ3.2	φ4.0	φ5.0
Welding Current (A)	60~100	80~140	110~210	160~230

Instructions:
1.The electrodes must be baked under 300~350℃ for an hour before welding and used as soon as baking is completed.
2. The stains on the weld, such as rust, oil stains, moisture, etc., must be cleared away before welding.
3. When welding, short arc must be used and stringer bead is suitable.
4.This kind of electrodes can also be used in AC welders, but the welding performance will be a little worse than that of the electrodes used in DC welders.

Packing details: In carton of 20kgs/net, consisting of 8 boxes x 2.5kgs for 2.5mm, & 4 boxes x 5kgs for other sizes.

With/ without pallets (Fumigation-free pallets) upon customer’s request.

ng is completed.
2.The stains on the weld, such as rust, oil stains, moisture, etc., must be cleared away before welding.
3.When welding, short arc must be used and stringer bead is suitable.

Packing details: In carton of 20kgs/net, consisting of 8 boxes x 2.5kgs for 2.5mm, & 4 boxes x 5kgs for other sizes.

With/ without pallets (Fumigation-free pallets) upon customer’s request.

or 2.5mm, & 4 boxes x 5kgs for other sizes.

With/ without pallets (Fumigation-free pallets) upon customer’s request.