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YAWATA H-250C (For Metal to Metal Moderate Abrasion)
Classification : DIN 8555 :E 1-UM-250
Approvals : TIS
Applications : Surfacing of shafts, rollers, couplings and crane wheels.
YAWATA H-250C is a low hydrogen type electrode with excellent weldability. It is suitable for surfacing worn machine parts since deposited metal has the hardness of about 250 Vickers and is easily machined. It is also suitable for depositing buffer layer in multi-layer welding due to its high crack resistance.
DIN 8555 :E 1-UM-250
|
C
|
Si
|
Mn
|
Cr
|
Cr+Mn+Mo+Ni
|
|
|
Req.
|
≤0.40
|
N.S.
|
N.S.
|
N.S.
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≤5.0
|
|
Typ.
|
0.13
|
0.41
|
0.94
|
0.66
|
2.1
|
Typ. = Typical results
N.S. = Not Specified
| Tensile Strength N/mm2 (kgf/mm2) |
Elongation % |
Charpy 2V-notch ที่ 0oC, J (kgf.m) |
|
| Req. | ≥XX | ≥XX | Not specified |
| Typ. | 660 (67) | 26 | 150 (15) |
|
Vicker(Hv)
|
Rockwell C (HRC)
|
Shore
|
Heat Treatment
|
|
249
|
22
|
36
|
As welded; preheat, interpass 150๐C
|
|
237
|
20
|
34
|
As welded; preheat, interpass 300๐C
|
|
229
|
18
|
33
|
Tempered at 500๐C
|
|
224
|
17
|
32
|
Tempered at 600๐C
|
| Diameter /Length (mm) |
3.2/350 | 4.0/400 | 5.0/450 | |
| Welding position | Current (A) | |||
| All | 80-150 | 120-180 | 170-240 | |
1. Use dry electrodes only. Damp electrodes should be re-dried at 300～350℃ for 60 minutes before use.
2. Preheating at more than 150℃ is required to surface low alloy steels, high carbon steel, etc.
2. Preheating at more than 150℃ is required to surface low alloy steels, high carbon steel, etc.
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