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- E BK 307-16
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Stainless Steel Welding Electrode E BK 307-16
E BK 307 -16, is a lime titania stainless steel electrode which may be from the deposited metal of 19%Cr. 9% Ni and 5% Mn stainless steel .with a preferred structure of austenite, Excellent weldability and scale, and corrosion resistance up to 900°C. Extreme high elongation and impact values make this electrode an excellent choice for critical welding applications
Applications
Application Welding of 14% Mn steel, steel armour, Hardenable steel . Joining of wear plates of each other and to their supports . Welding of die steels, alloy steels, stainless chromium steels, non magnetic steels and cast steels with unknown impurities. Especially recommended for thick sections.
Classification
AWS
AWS A 5.4: ~E 307-16 EN
EN ISO
ISO 3581-A: E 18 8 Mn R 53
DIN
------------Typical Weld Metal Analysis %
| C | Mn | Si | Mo | Cr | Ni | P | S | Fe |
| 0.10% |
5% |
1.5% | 0.98% | 19% | 8-10% | <0.025% | <0.015% | Bal. |
Mechanical Properties (As Welded)
| RP0,2
(N/mm2) |
Rm
(N/mm2) |
A
(%) |
Impact Energy +20°C -196°C |
| 650 | >790 |
>24 |
>30 >70 |
General Information
Welding process
Covered Electrode (SMAW)
Alloy Type
High alloyed steel
Re-drying Temperature
300°C/2hours
Welding Position
All, except vertical down.
Cleaning
Remove all cracks and fatigued metal by grinding.
Welding Parameters
| Diameter & Length (mm) |
Current (A) |
| 2.5x300 |
70~80 |
| 3.2x300 |
90~120 |
| 4.0x350 |
120~150 |
Instruction:
Electrode to be held perpendicular to the workpiece.
Preheating is necessary when joining high carbon steel ( 150 -250°C).
keep a short arc: Allow the welded area to cool down slowly.
Weld with low heat input. Preheat crack-sensitive steels.
Use a stainless steel chipping hammer and brush.
Preferred DC power supply, electric current should not be high.
Remove all traces of oil or grease.
Depending on the tempering temperature used.
The die-steel can be preheated up to 250-550°C.
Chromium steel (13-17% Cr) is preheated up to 200-300°C.
Manganese steel (14%) should be cold-welded