Carbon Steel

ROYAL PRIME 9-12MJ

AWS/ASME: A5.20 E71T-9/12MJ

ROYAL PRIME E71T-9/12MJ is a flux cored wire designed for: Welding carbon steels and structural steels in all positions. Excellent arc stability with smooth bead appearance. High mechanical properties suitable for general structural fabrication, shipbuilding, bridges, and offshore applications. Deposits welds with low hydrogen content, reducing risk of cracking.

1. Typical Chemical Composition of Weld Metal (% by weight)

C	Mn	Si	S	P	Cr	Ni	Mo	Cu
≤ 0.18	1.2 – 2.00	0.2 – 0.90	≤ 0.030	≤ 0.030	≤0.20	≤0.50	≤0.30	≤0.35

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -30 °C)
Typical Values	510 – 670	420 – 480	26 – 30	35 – 55

3. Recommended Operating Parameters (FCAW)

Diameter (mm)	Current (A)	Voltage (V)	Shielding Gas	Polarity
1.2	140 – 250	24 – 30	100% CO₂ / Ar+CO₂ (75/25)	DCEP
1.6	180 – 300	26 – 32	100% CO₂ / Ar+CO₂ (75/25)	DCEP

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