Products
YAWATA L-60 (For 590N/mm2Â High Tensile Strength Steel)
Classification :Â AWS A 5.5Â : E8016-G,Â
JIS Z 3211 : E5916-N1M1U,
EN 499 : E 50 2 1Ni B 1 2 H5
Approvals :Â -
Application : Welding of SM 570, SPV 450 and  590 N/mm2 high tensile strength steels (WEL-TEN 590) for penstocks, storage tanks, pressure tanks, pressure vessels, bridges, off-shore structures and machinary.
YAWATA L-60 is an extra low hydrogen type electrode with high resistance to moisture absorption. Weldability in all positions, mechanical properties and X-ray quality are excellent. Deposited metal shows satisfactory crack resistance due to its extremely low diffusible hydrogen content.
AWS A 5.5Â : E8016-G,Â
JIS Z 3211 : E5916-N1M1U,
EN 499 : E 50 2 1Ni B 1 2 H5
Â
| Â |
C
|
SiH
|
Mn
|
P
|
S
|
CrH
|
Mo
|
Ni
|
VH
|
CuH
|
|
Req.  Â
|
N.S.
|
0.30-0.60
|
≥1.00
|
N.S.
|
N.S.
|
์N.S.
|
≥0.20
|
≥0.50
|
N.S.
|
N.S.
|
|
Typ.  Â
|
0.07
|
0.49
|
1.09
|
0.010
|
0.010
|
0.09
|
0.23
|
0.69
|
0.00
|
0.11
|
Typ. = Typical results
N.S. = Not Specified
H = Alloy requirement of "G" group, minimum of at least one of the element listed in this table
C.L. = Combined Limit for Mn + Ni + Cr + Mo + V
Â
| Â | Tensile Strength N/mm2 (kgf/mm2) |
Yield Strength N/mm2 (kgf/mm2) |
Elongation % |
Charpy 2V-notch ที่ -49oC, J (kgf.m) |
Diffusible H2 Content  |
| Req.  | ≥550 | ≥460 | ≥19 | N.S. | ≤ 10 ml/100g |
| Typ.  | 640 | 540 | ≥29 | @ -10oC, ≥ 170 |  ≤ 5 ml/100g |
| Diameter /Length (mm) |
3.2/350 | 4.0/400 | 5.0/450 | |
| Welding position | Current (A) | |||
| F | 110-140 | 140-190 | 190-250 | |
| V, OH | 90-130 | 120-170 | 140-190 | |
< AC, DC+ >
1. Use dry electrodes only. Damp electrodes should be re-dried at 300～350℃ for 60 minutes.
2. Preheating in accordance with typr of steel, plate tickness, retraint, etc., i.e. at 50 - 100℃ for a 35 mm. thick plate, is necessary to prevent cracks.
3. Welding with excessively high heat input, i.e. more than 55 kJ/cm for a 35 mm thick plate, should be avoided to assure strength and toughness of weld.
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2. Preheating in accordance with typr of steel, plate tickness, retraint, etc., i.e. at 50 - 100℃ for a 35 mm. thick plate, is necessary to prevent cracks.
3. Welding with excessively high heat input, i.e. more than 55 kJ/cm for a 35 mm thick plate, should be avoided to assure strength and toughness of weld.
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