- OA BK- 58

Welding Welding Wire E BK OA 58

E BK OA 58 deposit is a high chromium-iron alloy recommended for application subject to severe abrasion and moderate impact and heat. High chromium cast iron deposit containing a high proportion of hard primary chromium carbides in a tough austenitic matrix

Applications

Cement industry, pumps, mixer blades, earthmoving equipment, dredging equipment and parts, wear plates, and Deposits are not machinable or forgeable and can be used in hot wear applications up to 900F In the rebuilding of coal pulverizer rolls, however, multiple layers can be applied using specific welding procedures. It can be applied to carbon, low alloy, and manganese steels. Crusher, Cement industry, wear plates ….etc

Classification

AWS

A 5.21

EN ISO

14700: T Fe15

DIN

8555: MF 10-60-G

Typical Weld Metal Analysis %

C	Mn	Mo	Cr	Si	Fe
5%	0.7%	1.5%	28%	1%	Bal.

Mechanical Properties (As Welded)

Abrasion Resistance	Impact Resistance	Deposit Layers
Extreme	medium	Multiple

Hardness58–62 HRC (AS WELDED 03 layers)

General Information

Welding process

Mig/Mag welding (FCAW)

Alloy Type

C-Cr Carbide basis

Re-drying Temperature

At Require

Welding Position

PA, PB, PC

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. On crack-sensitive steels or for hard facings where heavy impact occurs, use a base layer of OA 4370.