Stainless Steel Electrodes
ES 312 A5.4: E 312 –17 / EN 1600: E 29 9 R 12
Description
ES 312 is a rutile coated electrode. It gives a filler metal of the Cr-Ni type. Due to its high tensile and impact resistance, it is used for the joining and build up welding of steels with a high tendency to cracking. It is especially developed for maintenance and repair welding. Re-drying is 300°C min. 2 h.
Typical Chemical Composition (%)
| Si | Mn | Cr | C | Ni |
|---|---|---|---|---|
| 0.90 | 0.80 | 29.0 | 0.10 | 10.0 |
Typical Mechanical Properties
| Yeild Strength | Tensile Strength | Elongation 5x D | Impact (ISO-V) |
|---|---|---|---|
| 600 N / mm² | 800 N / mm² | % 25 | + 20 °C – 50 j |
Applications
Unalloyed steels, high carbon steels ( 1.4085 - G - 70 Cr 29 ), high alloyed steels, Cr-Mn steels, tool steels spring steels, high speed steels, cast pieces and air hard enable armour steel plates that have poor weld anility can be welded with E S 312 It is used for repair welding of sprockets and wheel shaft. Weld metal is resistant to corrosions, cracks and rust. Joining of unalloyed or low alloyed steels with stainless steels and build up welding of gears and shafts are among its application areas. Generally, there is no preheating requirement before welding. If preheating is necessary, prea heating temperature might be less than that required for other electrodes. ES 312 should not be used for the welding of parts that are continuously operating at temperatures exceeding 350°C. Inter pass temperature should be controlled in multi pass applications.
Sizes Available & Recomennded Currents
| Diam. (mm) | Length (mm) | Current (Amperes) | Arc Voltage | Wire Feed |
|---|---|---|---|---|
| 2.50 | 350 | 55 - 85 | ||
| 3.25 | 350 | 80 - 120 | ||
| 4.00 | 350 | 115 - 170 | ||
| 5.00 | 350 | 160 - 230 |
Welding Current
AC min. 50 V / DC ( + )
Welding Positions
 Flat |
 Horizontal |
 Vertical Up |
 Overhead |
 Fillet |