OK 63.85 is a basic coated niobium-stabilised 18Cr12Ni2.8Mo electrode for welding steels of similar composition. It has very good resistance against intergranular corrosion. The rather high ferrite content in combination with the basic coating provides a good hot cracking resistance. It has the best hot cracking resistance of the E318 type electrodes. Ferrite may transform to brittle phases at elevated temperatures. To avoid excessive embrittlement of the welds the maximum working temperature is limited to 400?C.Typical Tensile Properties
| As welded |
| 保护气体 | Elongation | Tensile Strength | Yield Strength |
| ISO | - | - | - |
| AWS | 35 % | 640 MPa | 490 MPa |
夏比V型缺口冲击性能
| As welded |
| Impact Value | Testing Temperature | 保护气体 |
| 65 J | 20 ?C | AWS |
| 45 J | -120 ?C | AWS |
焊缝金属分析
| Mn |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| 1.6 % | - | - | - | - | - | - | - | - |
| Mo |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | 2.7 % | - | - | - | - | - | - | - |
| C |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | 0.04 % | - | - | - | - | - | - |
| Nb |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | - | 0.55 % | - | - | - | - | - |
| Si |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | - | - | 0.5 % | - | - | - | - |
| Ferrite FN |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | - | - | - | 5 % | - | - | - |
| Ni |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | - | - | - | - | 13.0 % | - | - |
| Cr |
| Mn | Mo | C | Nb | Si | Ferrite FN | Ni | N | Cr |
| - | - | - | - | - | - | - | - | 17.9 % |
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 |
| 45 sec | 0.66 kg | 81 | 50-80 A | 1.0 kg/h | 22 V | 2.5 x 300 mm |
| 58 sec | 0.64 kg | 43 | 65-120 A | 1.5 kg/h | 23 V | 3.2 x 350 mm |
| 64 sec | 0.64 kg | 28 | 75-160 A | 2.0 kg/h | 24 V | 4.0 x 350 mm |
