Description

YAWATA Welding Electrodes FT-51 / L-55 — Mild-Steel Stick Rods (TIS)

YAWATA welding electrodes are flux-covered stick rods for welding mild steel with an arc (SMAW) welder. Two main types: FT-51 for general structural and shipbuilding work (TIS 49-2528 standard), and L-55, a low-hydrogen rod for high-strength work that welds both vertical and flat and carries tensile loads up to 490 N. Supplied by BOWMAP Industry & Tooling, Samut Prakan.

Specifications

Brand	YAWATA
Type	Flux-covered electrode (SMAW stick rod)
FT-51	Mild steel, structures, shipbuilding — TIS 49-2528 standard
L-55	Low hydrogen, for high-strength work
L-55 capability	Welds vertical and flat; tensile up to 490 N
Best for	Mild steel, steel structures, shipbuilding, general work
Use for	Standard arc (stick) welders

Use cases

• Welding steel structures and general mild-steel work (FT-51)
• Shipbuilding and large structures
• Work needing high strength and durability (L-55)
• Vertical and flat welding where weld quality matters
• Maintenance and production using arc welders

Compatibility

Use with an arc (stick) welder, and set the current to suit the rod size and material thickness. Flux-covered rods leave a slag over the bead that shields it from air and gives a clean weld. For the low-hydrogen L-55, keep rods dry and bake them per the instructions before use to avoid moisture that can make the weld brittle.

Availability

In stock at the BOWMAP warehouse in Samut Prakan, ready for same-day pickup or next-day delivery across Bangkok and the surrounding provinces. Contact us for bulk pricing on large orders.

Related products

• BrazeTec silver brazing rods / sheet / flux
• Auto-darkening welding helmets
• Gas cutting / welding sets
• Weld-stain remover

FAQ

How do FT-51 and L-55 differ?

FT-51 is a general mild-steel electrode (TIS 49-2528) for structures and shipbuilding. L-55 is a low-hydrogen rod that gives a stronger, more durable weld, welds both vertical and flat, and carries tensile loads up to 490 N — for high-strength work.

Why keep low-hydrogen rods dry?

Low-hydrogen rods (L-55) are moisture-sensitive. Damp flux introduces hydrogen into the weld, which can make it brittle and crack. Store the rods dry and bake them per the instructions before high-strength work.

What does the flux coating do?

The flux coating shields the molten metal from air as it melts, giving a well-shaped bead with good penetration. Once melted it floats up as slag over the weld, and it also steadies the arc and reduces spatter.