品牌:瑞典伊萨
直径:2.0-5.0
产地:瑞典
长度:350-450
起订:5公斤
供应:5000公斤
发货:1天内
OK 74.78是一款适合焊接低温应用所用高强度钢的LMA焊条。其在温度低至-40°C条件下具有优良的缺口韧性。非常适合用于要求硬度达到约250 HV的强制成形焊接和轨道堆焊。OK 74.78极低的药皮含水量非常适合无法进行预热的应用。
Typical Tensile Properties
| As welded | |||||
| Elongation | Tensile Strength | Yield Strength | 保护气体 | Stress Relieved Temperature | Stress Relieved Testing Time |
| 24 % | 650 MPa | 600 MPa | ISO | - | - |
| Stress relieved | |||||
| Elongation | Tensile Strength | Yield Strength | 保护气体 | Stress Relieved Temperature | Stress Relieved Testing Time |
| - | - | - | AWS | 620 °C | 1 hr |
夏比V型缺口冲击性能
| As welded | ||||
| Impact Value | Testing Temperature | 保护气体 | Stress Relieved Testing Temp | Stress Relieved Testing Time |
| 90 J | -40 °C | ISO | - | - |
| 70 J | -50 °C | ISO | - | - |
| Stress relieved | ||||
| Impact Value | Testing Temperature | 保护气体 | Stress Relieved Testing Temp | Stress Relieved Testing Time |
| - | -50 °C | AWS | 620 °C | 1 hr |
焊缝金属分析
| Mn | |||||
| Mn | Mo | C | Si | Ni | Cr |
| 1.60 % | - | - | - | - | - |
| Mo | |||||
| Mn | Mo | C | Si | Ni | Cr |
| - | 0.35 % | - | - | - | - |
| C | |||||
| Mn | Mo | C | Si | Ni | Cr |
| - | - | 0.05 % | - | - | - |
| Si | |||||
| Mn | Mo | C | Si | Ni | Cr |
| - | - | - | 0.35 % | - | - |
| Ni | |||||
| Mn | Mo | C | Si | Ni | Cr |
| - | - | - | - | 0.03 % | - |
| Cr | |||||
| Mn | Mo | C | Si | Ni | Cr |
| - | - | - | - | - | 0.03 % |
熔敷数据
| Fusion time per electrode at 90% I max | kg weld metal/kg electrodes | Number of electrodes/kg weld metal | 安培 | 熔敷率 | 电压 V | 直径 |
| 55 sec | 0.62 kg | 73.0 | 75-100 A | 0.90 kg/h | 22 V | 2.5 x 350 mm |
| 86 sec | 0.65 kg | 32.0 | 105-140 A | 1.30 kg/h | 23 V | 3.2 x 450 mm |
| 97 sec | 0.65 kg | 20.5 | 140-190 A | 1.80 kg/h | 23 V | 4.0 x 450 mm |
| 100 sec | 0.68 kg | 14.0 | 190-260 A | 2.60 kg/h | 24 V | 5.0 x 450 mm |
| 103 sec | 0.69 kg | 10 | 240-340 A | 3.6 kg/h | 24 V | 6.0 x 450 mm |
