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瑞典伊萨ESAB焊条OK68.81 /E312-17不锈钢电焊条
OK Autrod 13.91瑞典伊萨耐磨焊丝OK Autrodur 56 GM堆焊焊丝盾构机刀盘耐磨焊丝MSG-6-GZ-C-60G耐磨合金焊丝
陕西西安骏焊专业销售瑞典伊萨进口铝镁焊丝 气保耐磨实芯药芯焊丝 不锈钢气保焊丝 镍基焊条镍基焊丝 低合金焊条焊丝 高强钢焊条焊丝 铜焊条焊丝 铸铁焊条焊丝 耐磨焊条焊丝等进口焊条焊丝
OK 68.81
SMAW
Type Rutile-acid
OK 68.81 is a high-alloyed electrode which deposits a ferritic-austenitic duplex weld metal with approx. 40% ferrite. Resistant to stress corrosion and highly insensitive to dilution. Good scaling resistance up to 1150?C. OK 68.81 is used for joining dissimilar steels, steels with reduced weldability and buffer layers prior to hardfacing. Applications: rolls, forging dies, hot-work tools, dies for plastics and so on.
Welding current, A
DC+, AC OCV 60 V
Classifications
Approvals
Typical all weld metal composition
Typical properties all weld metal
SFA/AWS A5.4
E312-17
EN 1600
E 29 9 R 3 2
Werkstoff Nr.
1.4337
C
0,12
Si
0,7
Mn
0,8
Cr
29,0
Ni
9,8
Mo
<0,5
Cu
<0,3
Redrying temperature, ?C
350
Redrying time, hours
2
Yield stress, MPa
610
Tensile strength, MPa
790
Elongation, %
22
Elongation, %
22
Ferrite content
FN 50-80
Weld metal hardness, a w
220-240 HV
Machinability
Fair
Charpy V
Test temps, ?C
Impact values, J
+20
30
Diameter, mm
2,0
2,5
3,2
4,0
5,0
Length, mm
300
300
350
350
350
Arc voltage, V
22
24
25
26
28
Welding current, A
40-60
50-85
60-125
80-175
150-240
N. Kg weld metal/kg electrodes
0,64
0,64
0,62
0,62
0,65
B. No. of electrodes/kg weld metal
123,0
78,0
42,0
26,0
16,5
H. Kg weld metal/hour arc time
0,7
0,9
1,3
2,0
3,2
T. Burn-off time, secs/electrode
41
48
65
66
68
