描述
特点
LKE-7018-H4R is a low hydrogen type electrode for the welding of 490N/mm² grade high tensile steel. It is designed for single and multiple pass applications. The welding can be done with good appearance, stable arc and low spatter. With excellent mechanical properties, impact value at temperature of -40°C and low diffusible hydrogen.
应用：
It is suitable for welding of low alloy steels, medium carbon steels, heavy steel plates, cast steels, aluminum killed steel of LPG and especially for welding of steels with poor weldability.
使用说明：
1.Dry the electrodes at 350-400°C for 1-2 hours before use.
2.Keep the arc as short as possible to prevent moisture pick-up.
3.Take the back-step method to prevent blowholes at the arc starting.
分类：
AWS A5.1 E7018-H4R
EN 2560-A E 42 4 B 4 2 H5
Welding position:
焊接金属的典型化学成分（wt%）
| C | 锰 | Si | P | S |
| 0.070 | 1.10 | 0.50 | 0.02 | 0.004 |
焊接金属的典型机械性能
| YP N/mm² | TS N/mm² | EL % | IV -40℃ J |
| 490 | 560 | 29 | >47 |
Sizes and recommended current range (AC or DC+)
| Diameter (mm) | 2.6 | 3.2 | 4.0 | 5.0 | |
| Length (mm) | 350 | 350 | 450 | 450 | |
| 安培数 | F | 80-100 | 130-150 | 160-190 | 200-240 |
| V&OH | 70-100 | 90-150 | 130-160 | 170-200 | |
| Weight per pack (kg) | 4/5 | 5 | 5 | 5 | |
| Weight per carton (kg) | 20 | 20 | 20 | 20 | |
