 |
- E-BKhard MnCr
|
Welding Electrode E BK Hard MnCr
E BK Hard MnCr is manganese steel with chromium carbide coated electrode for high impact and wear resistance
Applications
It is suitable for multi-layer build-up and has excellent work hardening. Hard facing of mining and rock-crushing machine parts as well as of hard manganese steel . austenitic manganese steel, high impact loads, hammers, crushers, rebuilding, hard facing, rails, crossings, Breaker teeth, etc.
Properties
This electrode with a recovery of 140% can be used for joining and overlay on manganese steels that are worn out and need to be rebuilt. Heat input should be below. the increasing hardness of weld metal after operations including its exposure to impact and friction. Good bond on steel, cast steel, and manganese steel. Smooth deposit with very low friction coefficient.
AWS
A 5.13: E FeMnCr
EN ISO
-------------------
DIN
8555: E 7-UM-250-KTypical Weld Metal Analysis %
| C | Mn | Cr | Fe |
| 1% | 16% | 16% | Bal. |
Mechanical Properties (As Welded)
| Abrasion Resistance |
Impact Resistance |
Deposit Layers |
||
| Medium |
Very High |
Multiple |
||
| Yield Strength RP0,2 (N/mm2) |
Tensile Strength Rm (N/mm2) |
A (%) |
||
| 410 MPa (59 ksi) |
Ksi (MPa) 128 (1172) |
40% |
||
| HARDNESS |
57 - 62 HRC |
| HARDNESS, AS DEPOSITED |
250 HB |
| WORK HARDNESS |
550 HB |
General Information
Welding process
Covered Electrode (SMAW)
Alloy Type
: Austenitic Manganese Steel
Re-drying Temperature
At Require
Welding
Position
PA, PB, PC
Cleaning
Remove all cracks and fatigued metal by grinding.
Polarity
AC or DC, reverse polarity (electrode positive)
Welding parameters
| Diameter & Length (mm) |
Current (A) |
| 2.5x300 |
70~80 |
| 3.2x300 |
90~120 |
| 4.0x350 |
120~150 |
Instruction:
Weld with low heat input.
Electrode to be held perpendicular to the workpiece.
Preferred DC power supply, electric current should not be high.
Use weaving beads (do not stringer )