OK 76.98为一款适合焊接诸如T91/P91等改性9 Cr钢的低氢焊条。该焊条适用于管道和板材的全位置焊接。在此所列的机械性能参数为750°C热处理两小时之后测得。
Typical Tensile Properties
PWHT 755°C 2h | |||||
Elongation | Tensile Strength | Yield Strength | 保护气体 | Stress Relieved Temperature | Stress Relieved Testing Time |
21 % | 820 MPa | 720 MPa | ISO | - | - |
Stress relieved | |||||
Elongation | Tensile Strength | Yield Strength | 保护气体 | Stress Relieved Temperature | Stress Relieved Testing Time |
- | - | - | ISO | 760 °C | 3 hr |
PWHT 755°C 2h | |||||
Elongation | Tensile Strength | Yield Strength | 保护气体 | Stress Relieved Temperature | Stress Relieved Testing Time |
- | - | - | AWS | - | - |
夏比V型缺口冲击性能
PWHT 755°C 2h | ||||
Impact Value | Testing Temperature | 保护气体 | Stress Relieved Testing Temp | Stress Relieved Testing Time |
50 J | 20 °C | ISO | - | - |
Stress relieved | ||||
Impact Value | Testing Temperature | 保护气体 | Stress Relieved Testing Temp | Stress Relieved Testing Time |
- | 20 °C | ISO | 760 °C | 3 hr |
焊缝金属分析
Mn | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
0.8 % | - | - | - | - | - | - | - |
Mo | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | 1 % | - | - | - | - | - | - |
C | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | 0.1 % | - | - | - | - | - |
Nb | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | - | 0.06 % | - | - | - | - |
Si | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | - | - | 0.35 % | - | - | - |
V | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | - | - | - | 0.24 % | - | - |
Ni | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | - | - | - | - | 0.7 % | - |
Cr | |||||||
Mn | Mo | C | Nb | Si | V | Ni | Cr |
- | - | - | - | - | - | - | 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 |
56 sec | 0.66 kg | 71.4 | 70-100 A | 0.90 kg/h | 21 V | 2.5 x 350 mm |
68 sec | 0.60 kg | 45.5 | 90-135 A | 1.20 kg/h | 22 V | 3.2 x 350 mm |
85 sec | 0.64 kg | 22.6 | 130-200 A | 1.90 kg/h | 23 V | 4.0 x 450 mm |