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OK 83.28
SMAW
Type Basic
OK 83.28 is a chromium-alloyed electrode for hardfacing and cladding tracks, shafts, rolls, rails and rail crossing sections, details in rolling mills, e.g. grooved rollers and clutches and big cog wheels of cast steel. Another application is joining of hardenable steels.
Welding current, A
AC, DC+ OCV 70 V
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | | DB | 20.039.01 | |
| Sepros | UNA 485155 | |
| | Redrying temperature, °C
200
Redrying time, hours
2
Weld metal hardness, a w
~30 HRC
Tempering resistance
Temp°C.HRC(1h).HRC(24h)
100.33.33
300.33.33
400.34.34
500.35.28
600.27.17
700.18
Machinability
Good
Metal-to-metal wear resistance
Very good
Impact resistance
Very good
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| Diameter, mm | 2,5 | 3,2 | 4,0 | 5,0 | 6,0 | | Length, mm | 350 | 450 | 450 | 450 | 450 | | Arc voltage, V | 20 | 21 | 22 | 23 | 23 | | Welding current, A | 60-90 | 100-140 | 140-190 | 190-260 | 230-320 | | N. Kg weld metal/kg electrodes | 0,64 | 0,66 | 0,66 | 0,68 | 0,68 | | B. No. of electrodes/kg weld metal | 69,0 | 34,0 | 23,0 | 15,0 | 10,5 | | H. Kg weld metal/hour arc time | 0,7 | 1,2 | 1,7 | 2,8 | 3,7 | | T. Burn-off time, secs/electrode | 75 | 88 | 92 | 86 | 92 |
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