OK 73.68为一款2.5％
镍合金化LMA
焊条，适合用于焊接温度低至-60°C条件下具有冲击强度要求的低
合金钢。焊缝金属成分相当优异，在立向上焊时仍可获得低温冲击性能。OK 73.68的焊缝金属还具有优良的耐海水和耐硫酸烟雾性能。
Typical Tensile Properties
As welded
Elongation Tensile Strength Yield Strength 保护气体 Stress Relieved Temperature Stress Relieved Testing Time
28 ％ 615 MPa 540 MPa ISO - -
Stress relieved
Elongation Tensile Strength Yield Strength 保护气体 Stress Relieved Temperature Stress Relieved Testing Time
28 ％ 600 MPa 500 MPa 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
105 J -60 °C ISO - -
65 J -80 °C ISO - -
Stress relieved
Impact Value Testing Temperature 保护气体 Stress Relieved Testing Temp Stress Relieved Testing Time
85 J -60 °C AWS 620 °C 1 hr
焊缝金属分析
Mn
Mn Mo C Si Ni Cr
1 ％ - - - - -
Mo
Mn Mo C Si Ni Cr
- 0.01 ％ - - - -
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
- - - - 2.4 ％ -
Cr
Mn Mo C Si Ni Cr
- - - - - 0.02 ％
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 70.0 70-110 A 0.90 kg/h 23 V 2.5 x 350 mm
81 sec 0.62 kg 32.0 105-150 A 1.40 kg/h 23 V 3.2 x 450 mm
88 sec 0.65 kg 21.0 140-190 A 2.00 kg/h 23 V 4.0 x 450 mm
104 sec 0.65 kg 13.5 190-270 A 2.50 kg/h 27 V 5.0 x 450 mm
