伊萨焊材.价格：0.00元/公斤 最小起订量：5 公斤 供货总量：5000 公斤 发货期限：自买家付款之日起1天内发货 有效期至：长期有效
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
|
