Kobatek 381
gENERAL DESCRIPTION
Kobatek 381 deposits a Cr/Ni/Mo based stainless steel weld metal. It is designed for welding large, high strength steel components requiring fast multi-layer deposits with crack resistance. It is ideal for repairing difficult-to-weld steels and for putting down buffer layers before filling up with hardenable deposits. It can be used as a buffer layer on high manganese Hadfield steel and for surfacing where some resistance to impact and battering is required under corrosive conditions.
Mechanical Properties, Typical, All Weld Metal
| Yield Strength | : | 58 – 62 | (kg/mm²) | ||
|---|---|---|---|---|---|
| Tensile Strength | : | 76 – 82 | (kg/mm²) | ||
| Elongation (L=5d) | : | 20 – 25 | (%) | ||
| Hardness | : | 220 – 260 | (HB) |
Approvals and Certificates
Certificates
|
GOST |
TSEK |
Application Areas
- Press cylinders in plastic and food industries
- Earth moving equipments
- Hydraulic cylinders
- Injection moulds
- Extrusion screws
- Turbine blades
- Valve seats for superheated steam
- Heat exchangers
- Coal washing screens
- Wear plates
- Bucket tooth
- Dies, gears, shafts, tools
Welding Parameters / Packing and Diameter Informations
Current Type and Polarity : DC (+) / AC
| Diameter x Length (mm) |
Procedure – A Current (Amper) |
Procedure – B Current (Amper) |
Weight (kg/box) |
|---|---|---|---|
| 2.50 x 350 |
90 – 120 | 70 – 80 | 5 |
| 3.25 x 350 |
130 – 150 | 110 – 120 | 5 |
| 4.00 x 350 |
180 – 210 | 120 – 160 | 5 |
PROCEDURE – A
High Amperage Welding
High amperage welding for heavy sections and large parts, maximum deposition rates.
PROCEDURE – B
Low Amperage Welding
Low amperage welding for small sections and parts which must not be overheated, minimum dilution and low heat input.
