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 ***oid 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 |