- Applications
- Bond welding of dissimilar metals such as stainless steel, carbon steel and low alloy steel.
Welding of stainless clad steel.
- Characteristics
-
- - It is a lime-titania type electrode, has an excellent usability and weldability. Chemical composition of all-weld metal is
29%Cr-9%Ni.
- - Owing to the austenite structure containing large contents of ferrite, W 312 has a good crack resistibility.
- - It is used for welding dissimilar metals and under laying welding of hardsurfacing.
- Notes on Usage
-
- - Keep the arc as short as possible and use currents as low as possible.
- - Dry the electrodes at 250~300℃(482~572℉) for 60~90 minutes before use.
- - Preheat the base metal at over 200℃(392℉) to prevent cracking in welding of high alloyed steel, having good hardenability such as tool steel.
- Sizes Available and Recommended Currents ( AC or DC ± )
-
Sizes Available and Recommended Currents ( AC or DC ± )
Dia. (mm) |
2.0 |
2.6 |
3.2 |
4.0 |
5.0 |
Length (mm) |
250 |
300 |
350 |
350 |
350 |
Current (A) |
F |
30~50 |
50~80 |
70~115 |
100~150 |
140~190 |
V-up & OH |
25~45 |
45~75 |
60~110 |
90~140 |
- |
- Typical Chemical Composition of All-Weld Metal (wt%)
-
Typical Chemical Composition of All-Weld Metal (wt%)
C |
Mn |
Si |
P |
S |
Cr |
Ni |
0.10 |
1.49 |
0.40 |
0.022 |
0.010 |
29.2 |
9.5 |
- Typical Mechanical Properties of All-Weld Metal
-
Typical Mechanical Properties of All-Weld Metal
T.S (MPa) |
EL (%) |
802 |
27 |
- Welding positions