Low Alloy Steel

ROYAL PRIME 111T-1

AWS/ASME: A5.29 E111T1-K3MJ-H4

ROYAL PRIME E111T1-K3MJ-H4 is a high-performance flux-cored wire for:Welding low alloy steels requiring ultra-high strength (>111 ksi / 760 MPa).High arc stability with minimal spatter and smooth bead formation.Designed for heavy structural steel, offshore platforms, pipelines, and pressure vessels.Low hydrogen characteristics (H4) reduce the risk of cracking in thick or restrained sections.

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

C	Mn	Si	Ni	P	S	Cr	Mo
0.03-0.15	1.20 – 2.25	0.20 – 0.80	1.75– 2.65	≤0.03	≤0.03	0.20-0.60	0.20-0.65

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -20 °C)
Typical Values	770 – 830	710 – 780	20 – 24	40 – 55

3. Recommended Welding Parameters — A5.29 E111T1-K3MJ-H4

Welding Position	Current (A)	Voltage (V)	Shielding Gas	Gas Flow (L/min)	Polarity
Flat / Horizontal	250 – 400	30 – 36	100% CO₂ or Ar + 20–25% CO₂ (mix)	15 – 25	DCEP
Vertical / Overhead	200 – 360	28 – 34	100% CO₂ or Ar + 20–25% CO₂ (mix)	15 – 25	DCEP

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