Products

YAWATA L-59 (For 490N/mm²High Tensile Strength Steel)

Classification : AWS A 5.1 : E7016, JIS Z 3211 : E4916U

Approvals : ABS, BV, NK

Application : Welding of 490 N/mm² high tensile strength steels for ships, structures, pressure vessel industry, shipbuilding and bridges.

Property

YAWATA L-59 is a low hydrogen type electrode for all positions welding. Smooth arc, easy slag removal and provide good weld appearance. High performance X-ray quality and excellent mechanical properties.

Classification

AWS A 5.1 : E7016

JIS Z 3211 : E4916U

ISO 2560 : E 51 5 B 26 (H)
EN 499 : E 42 2 B 12 H5

Chemical Composition

	C	Si	Mn	P	S	Cr	Mo	Ni	V	C.L.
Req.	≤0.15	≤0.75	≤1.60	≤0.035	≤0.035	≤0.20	≤0.30	≤0.30	≤0.08	≤1.75
Typ.	0.08	0.54	1.10	0.007	0.009	0.09	≤0.01	0.09	≤0.01	1.10

Req. = Requirement
Typ. = Typical results
N.S. = Not Specified
C.L. = Combined Limit for Mn + Ni + Cr + Mo + V

Mechanical Properties

	Tensile Strength N/mm² (kgf/mm²)	Yield Strength N/mm² (kgf/mm²)	Elongation %	Charpy 2V-notch ที่ -49^oC, J (kgf.m)	Diffusible H₂ Content
Req.	≥430	≥430	≥17	-20^oC= ≥27 (AWS A5.1) -29^oC/-30^oC = ≥27 (AWS A5.1) -29^oC/-30^oC = ≥47 (ISO 2560-A) -49^oC/-50^oC = ≥47 (ISO 2560-A)	≤ 10 ml/100g
Typ.	580	490	≥31	@ -20^oC, ≥ 170 @ -49^oC, ≥ 134	≤ 5 ml/100g

Recommended Size and Power Range

Diameter/ Length (mm)	2.6/300	3.2/350	4.0/400	5.0/450
Welding Position	Current (A)
F	70-10	100-140	150-190	190-240
V-up, OH	60-90	80-120	110-150	130-170

Recommendations for Use

1. Use dry electrodes only. Damp electrodes should be re-dried at 300～350℃ for 60 minutes.
2. Backstep method should be applied to prevent blowholes and pits at arc starting and arc length should be kept as short as possible during welding.
3. All water, rust and oil in groove should be completely removed to prevent cracks and blowholes.