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.

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Technical Data

Product Specifications

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

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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