| SFA/AWS A5.5 |
| E9018-D1 |
| EN ISO 18275-A |
| E 55 4 MnMo B 3 2 H5 |
| 测试温度(焊态) | -20 °C |
| 结果(焊态) | 90 J |
| 测试温度(焊态) | -50 °C |
| 结果(焊态) | 60 J |
| 伸长率(焊态) | 24 % |
| 屈服强度(焊态) | 600 MPa |
| 抗拉强度(焊态) | 650 MPa |
| 电流类型 CA/CD/CC (+)(-) | AC, DC+ OCV 65 V |
| 元素 | C |
| 额定百分比 | 0.06 % |
| 元素 | Si |
| 额定百分比 | 0.4 % |
OK 74.78 is an LMA electrode suitable for welding high tensile steels used in low-temperature applications. Good notch toughness down to -40°C. Very suitable for both the enclosed welding and cladding of rails, when a hardness of about 250 HV is required. The moisture content of the coating is very low, which makes OK 74.78 suitable when preheating cannot be applied.
