AWS A5.4 E312-16
Description:
AWS E312-16 welding electrode is a kind of Lime titania type cover used for welding high carbon steels, tool steels, dissimilar steels and Cr29Ni9 cast steels, duplex stainless steels as well as problem steels.
Instruction:
1. The electrodes should be baked under 200-250º C for an hour before welding.
2. Direct current had better be used and the current should not be too strong.
Chemical Composition of Deposited Metal (%)
Chemical Composition |
C |
Mn |
Si |
S |
P |
Cr |
Ni |
Mo |
Cu |
Guarantee Value |
≤0.15 |
0.5-2.50 |
≤0.90 |
≤0.030 |
≤0.040 |
28.0-32.0 |
8.0-10.5 |
≤ 0.75 |
≤0.75 |
Typical Value |
0.085 |
1.92 |
0.78 |
0.012 |
0.028 |
28.71 |
9.95 |
0.16 |
0.20 |
|
Mechanical Properties of Deposited Metal
Test Item |
R m (MPa) |
A(%) |
Guarantee Value |
≥660 |
≥22 |
Typical Value |
785 |
26 |
|
Reference Current (AC, DC+)
Electrode Diameter(mm) |
φ2.0 |
φ2.5 |
φ3.2 |
φ4.0 |
φ5.0 |
Welding Current (A) |
40~80 |
50~100 |
70~130 |
100~160 |
140~200 |
|