Description: AFM E8018-B3L is similar to AFM E9018-B3, except that the carbon content is reduced to .05 maximum. This classification replaces E9018-B3L under AWS A5.5-81. The strength designations and room-temperature strength requirements after postweld heat treatment have been reduced to reflect the fact that commercial products have been producing marginal tensile strength results in classification tests over many years. The base metals with which this classification is generally used have lower strength requirements than were reflected by the former electrode classification. The lower carbon in the weld metal will improve ductility and lower hardness, but will also reduce the high-temperature strength and creep resistance of the weld metal.
Applications: AFM E8018-B3L is used for welding 2 1/4% Cr-1% Mo steels. It is used to weld thin wall A335-P22 Pipe for use in the ˇ°as-weldedˇ± condition. Common applications include cast steels, boiler and heat exchanger tubes, cast and forged steels.
Typical Weld Metal Chemistry (%): |
(C) |
Carbon |
0.04 |
| (Cr) |
Chromium |
2.33 |
| (Mn) |
Manganese |
0.79 |
(Mo) |
Molybtenum |
1.06 |
(P) |
Phosphorus |
0.012 |
(S) |
Sulfer |
0.011 |
(Si) |
Silicon |
0.46 |
Typical Mechanical Properties:
- Tensile Strength, psi 93,000
- Yield Strength, psi 78,000
- Elongation in 2ˇ±, (%) 25
- Reduction in Area, (%)
Recommended Current Ranges (AC or DC+): |
| Dia |
3/32 |
1/8 |
5/32 |
3/16 |
| MM |
2.4 |
3.2 |
4.0 |
4.8 |
| Flat |
60-100 |
90-130 |
130-190 |
190-250 |
V & O |
60-90 |
80-120 |
110-170 |
N/A |
Standard Packaging: 10# hermetically sealed package; 50# master carton. Also available in 50# HSC.
|
