AWS A 5.18 ER70S-G
JIS Z3316 YGT50
▶︎ Characteristics
It is designed for welding of mild steel and 490N/mm2 grade steel. Commonly used is butt or fillet welding. LKT-50 is an all-position welding rod for TIG welding. It is especially suitable for the root pass of pipe welding. Use DC(-) polarity.
▶︎ Applications:
It is suitable for welding of high pressure piping for shipbuilding, petrochemistry and nuclear power plant, etc.
▶︎ Notes on Usage:
1. Use 99.997% purity of Ar as shielding gas.
2. Clean the surface of base metal to prevent contamination.
▶︎ Classification:
AWS A 5.18 ER70S-G
JIS Z3316 YGT50
▶︎ Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S | Cu | Ti |
| 0.083 | 1.26 | 0.85 | 0.015 | 0.005 | 0.015 | Bal. |
▶︎ Typical mechanical properties of weld metal
| YP N/mm2 | TS N/mm2 | EL % | IV -30 ºC J |
| 440 | 550 | 33 | 62 |
▶︎ Sizes and Weight per pack.
| Welding Wire Diameter (mm) | 1.6 | 2.0 | 2.4 | 2.6 | 3.2 | 4.0 |
| Welding Wire Length (mm) | 915 | 915 | 915 | 915 | 915 | 915 |
| Welding Wire Weight per Box (kg) | 5 | 5 | 5 | 5 | 5 | 5 |
