Flux

ROYAL FLUX B62

AWS/ASME: A5.17 F7A5-EM12K

ROYAL FLUX B62 is a fused basic flux engineered for submerged arc welding with EM12K wires.
Provides high tensile strength and excellent low-temperature impact toughness.
Basicity index ≥ 1.8, offering superior resistance to hot cracking.
Suitable for multi-pass welding of thick sections with low hydrogen content.
Ensures good slag detachability and smooth weld bead appearance.
Designed for pressure vessels, pipelines, offshore structures, bridges, and heavy fabrication.

1. Typical Chemical Composition of Weld Metal

C	Mn	Si	S	P	Fe
0.07 – 0.12	1.00 – 1.40	0.20 – 0.40	≤ 0.020	≤ 0.020	Balance

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -50 °C)
Typical Values	600 – 660	500 – 560	24 – 30	60 – 85

3. Recommended Welding Parameters — AWS A5.17 F7A5-EM12K

Welding Position	Current (A)	Voltage (V)	Polarity	Flux Consumption (kg/kg Wire)
Flat / Horizontal	400 – 1000	28 – 44	AC / DCEP	0.9 – 1.1

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