- OA BK- 4370

Welding Wire OA BK- 4370

OA 4370 This is a versatile CrNiMn rutile flux-cored wire that operates with a stable, almost spatter-free arc to produce a shiny, smooth weld bead surface with a self-releasing slag. The weld metal offers exceptionally high ductility and elongation combined with outstanding crack resistance due to the high manganese content. The weld deposit also work-hardens and provides good wear and friction resistance

Applications

Dissimilar steel welding such as austenitic manganese steel to carbon steel, buffer layers prior to hard facing. and .dissimilar welding. Due to its low nickel content, it also provides a cost-effective alternative to 309 welding materials for general dissimilar welding of mild steel to stainless steel

Classification

AWS

A 5.21

EN ISO

14700: T Fe15

DIN

8555: MF 10-60-G

Typical Weld Metal Analysis

C	Mn	Si	Cr	Ni	Mo	P	Fe
0.05%	6.8%	0.6%	22%	8.5%	1.4%	0.02%	Bal.

Mechanical Properties (As Welded)

Yield Strength N/mm²	Tensile Strength N/mm²	Elongation 5d (%)
> 400 MPa	> 580 MPa	> 30%

Hardness----------

General Information

Welding process

Mig/Mag welding (FCAW)

Alloy Type

Creep resistant steels

Re-drying Temperature

At Require

Welding Position

All (Except Vertical Down)

Cleaning

Remove all cracks and fatigued metal by grinding.

Polarity

AC or DC,

Welding parameters

Diameter (mm)	Voltage (V)	Current (A)
1.6	20-30	180-320
2.4	26-32	200-400
2.8	29-32	350~450

Instruction:

Weld with low heat input.

Use a stick-out (distance from the contact tip to the extremity of the wire) of 20 to 50 mm (1-2") for open arc welding.

For a correct wire feed, use appropriate drive rolls for cored wire in the wire feeder and a water-cooled torch that is smoothly inclined.

Open arc welding Stick-out: 30 - 40 mm (1,18 - 1,57") Wire feed: 5m/min (197"per min) Remove all worn-out material. Preheat high carbon and low alloyed steel. When welding manganese steels, the temperature should remain below 300 °C (570 °F).

Remove all cracks and fatigued metal by grinding. The surface must be thoroughly cleaned from oil and grease