Low Alloy Steel

ROYAL PRIME 91T-8

AWS/ASME: A5.36 E91T8-A2-K2-H8

ROYAL PRIME 91T-8 is a self-shielded flux cored wire designed for high-strength low alloy steels.
Delivers excellent impact toughness at low temperatures.
Designed for structural steel, offshore platforms, and heavy equipment fabrication.
High productivity in out-of-position welding (all-position electrode).
No shielding gas required – ideal for field erection and windy environments.
Hydrogen-controlled formulation (H8) reduces risk of cold cracking.

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

C	Mn	Si	Ni	Mo	Fe
0.05 – 0.12	1.0 – 1.6	0.2 – 0.6	1.5 – 2.5	0.3 – 0.6	Balance

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -40 °C)	Diffusible Hydrogen (ml/100 g)
Typical Values	650 – 720	570 – 600	20 – 24	40 – 60	6 – 8

3. Recommended Welding Parameters — A5.36 E91T8-A2-K2-H8

Welding Position	Current (A)	Voltage (V)	Shielding Gas	Gas Flow (L/min)
Flat / Horizontal	180 – 350	24 – 32	Self-shielded	Not required
Vertical / Overhead	120 – 280	22 – 30	Self-shielded	Not required

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